CN112984556B - Liquid oxygen gas fuel gas generator - Google Patents
Liquid oxygen gas fuel gas generator Download PDFInfo
- Publication number
- CN112984556B CN112984556B CN202110231600.9A CN202110231600A CN112984556B CN 112984556 B CN112984556 B CN 112984556B CN 202110231600 A CN202110231600 A CN 202110231600A CN 112984556 B CN112984556 B CN 112984556B
- Authority
- CN
- China
- Prior art keywords
- wall body
- flow
- liquid oxygen
- medium
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/38—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply comprising rotary fuel injection means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a liquid oxygen gas fuel gas generator, and relates to the technical field of aerospace equipment. The liquid oxygen kerosene fuel gas generator comprises a combustion chamber body and a pintle injection mechanism; the combustion chamber body comprises a wall body and a combustion chamber, the combustion chamber penetrates through the wall body along the axis direction of the wall body, a first opening and a second opening are formed at two ends of the wall body respectively, a flow inlet and a flow outlet are further formed in the wall body, the flow inlet is close to the first opening, the flow outlet is close to the second opening, a plurality of flow guide channels are arranged in the wall body, and each flow guide channel is communicated with the flow inlet and the flow outlet; the pintle jetting mechanism is arranged on the wall body and located at the second opening, the pintle jetting mechanism comprises a jetting end, a first medium channel and a second medium channel, the jetting end faces the combustion cavity, and the first medium channel is connected with the outflow port. The liquid oxygen kerosene fuel gas generator provided by the invention solves the problem that the combustion chamber body is burnt due to overhigh fuel gas temperature, improves the performance of the engine, and has a larger variable thrust adjusting range.
Description
Technical Field
The invention relates to the technical field of aerospace and aviation equipment, in particular to a liquid oxygen gas-fuel gas generator.
Background
The fuel gas generator plays an important role in the fields of aviation and aerospace and is a key device for the operation of an engine system. When the gas generator operates, fuel and oxidant are combusted in the gas generator after passing through the injector to generate high-temperature and high-pressure gas, the high-temperature gas is further expanded through the jet pipe and reaches the turbine blades through the pipeline to drive the turbine pump, power is provided for an engine system, and the normal operation of the whole engine is maintained.
However, when the existing gas generator works, due to the fact that the gas temperature is too high, the situation that the combustion chamber is burnt by the too high temperature can occur seriously, and the performance of the engine is seriously influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the application provides a liquid oxygen coal oil gas generator which is used for solving the problem that a combustion chamber is burnt due to overhigh gas temperature when the existing gas generator works.
In order to achieve the purpose, the liquid oxygen coal oil fuel gas generator comprises a combustion chamber body and a pintle injection mechanism;
the combustion chamber body comprises a wall body and a combustion cavity formed by the wall body in a surrounding mode, the combustion cavity penetrates through the wall body along the axis direction of the wall body, a first opening and a second opening are formed in two ends of the wall body respectively, a flow inlet and a flow outlet are further formed in the wall body, the flow inlet is close to the first opening, the flow outlet is close to the second opening, a plurality of flow guide channels are arranged in the wall body, and each flow guide channel is communicated with the flow inlet and the flow outlet;
the pintle injection mechanism is arranged on the wall body and is positioned at the second opening, the pintle injection mechanism comprises an injection end, a first medium channel and a second medium channel, the injection end faces the combustion cavity, and the first medium channel is connected with the outflow port;
the first medium channel is used for conveying kerosene to the injection end, the second medium channel is used for conveying liquid oxygen to the injection end, and the kerosene and the liquid oxygen are subjected to impact atomization at the injection end.
In a possible embodiment, the flow channels are distributed uniformly in the circumferential direction of the wall.
In one possible embodiment, the inner diameter of the combustion chamber to the first opening is tapered.
In a possible embodiment, an annular flow dividing chamber is further disposed around the wall body, the annular flow dividing chamber is close to the first opening, and the annular flow dividing chamber is communicated with an inlet of each flow guide channel.
In a possible embodiment, the outflow opening is provided as an annular groove, which communicates with the outlet of each of the flow-guiding channels.
In a possible embodiment, the injection end comprises a first medium outlet and a second medium outlet, the first medium outlet is communicated with the first medium flow channel, and the second medium outlet is communicated with the second medium flow channel;
wherein the opening degrees of the first medium outlet and the second medium outlet are changed in proportion.
In one possible embodiment, the opening width of the first medium outlet is set to L, the opening width of the second medium outlet is set to H, and the included angle formed between the injection direction of the first medium outlet and the axial direction of the central rod of the pintle injection mechanism is set to α, and the following conditions are satisfied: l ═ H × sin α.
In one possible embodiment, the pintle injection mechanism comprises a seat assembly, an adjusting needle valve and a central rod;
the seat body component is detachably connected with the wall body;
the central rod is inserted in the seat body assembly;
the adjusting needle valve is sleeved on the central rod in a sliding mode and is close to the injection end, the adjusting needle valve is matched with the wall body and the central rod in an abutting mode respectively, the first medium flow channel is formed between the outer cylindrical surface of the adjusting needle valve and the wall body, and the second medium flow channel is formed between the inner cylindrical surface of the adjusting needle valve and the central rod.
In a possible embodiment, a spiral flow guiding structure is arranged on the central rod.
In a possible embodiment, the pedestal subassembly includes well lid and end cover, well lid with the end cover is followed the axis direction of wall body sets up, just well lid is located the end cover with between the wall body, the end cover with be formed with between the well lid and accept well core rod with the space of adjusting the needle valve, the terminal surface of end cover is provided with spacing hole, spacing hole is used for the axial of adjusting the needle valve is spacing.
Compared with the prior art, the beneficial effects of the application are that:
the application provides a liquid oxygen coal oil gas generator, which comprises a combustion chamber body and a pintle jetting mechanism; the combustion chamber body comprises a wall body and a combustion chamber formed by the wall body in a surrounding mode, the combustion chamber penetrates through the wall body along the axis direction of the wall body, a first opening and a second opening are formed in the two ends of the wall body respectively, a flow inlet and a flow outlet are further formed in the wall body, the flow inlet is close to the first opening, the flow outlet is close to the second opening, a plurality of flow guide channels are arranged in the wall body, and each flow guide channel is communicated with the flow inlet and the flow outlet; the pintle jetting mechanism is arranged on the wall body and positioned at the second opening, the pintle jetting mechanism comprises a jetting end, a first medium channel and a second medium channel, the jetting end faces the combustion cavity, and the first medium channel is connected with the outflow port; the first medium channel is used for conveying kerosene to the jetting end, the second medium channel is used for conveying liquid oxygen to the jetting end, and the kerosene and the liquid oxygen are subjected to impact atomization at the jetting end. The application provides a liquid oxygen kerosene gas generator, during operation, kerosene is by the admission port, through the first medium runner of water conservancy diversion passageway reentrant, from this, and the kerosene is as the coolant of combustion chamber body promptly, can provide thrust for the engine again after the burning, through the cooling of kerosene to the combustion chamber body, has avoided burning the problem of destroying the combustion chamber body because of the gas temperature is too high, improves the performance of engine.
In addition, according to the liquid oxygen kerosene fuel gas generator, the pintle injection mechanism is adopted to inject fuel into the combustion cavity, the adjustable advantage of the pintle injection mechanism is utilized, the combustion efficiency is improved, and the variable thrust adjustment of the engine in a wider range is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 illustrates a front view of a liquid oxygen gas fuel gas generator according to an embodiment of the present application;
FIG. 2 shows a cross-sectional view along A-A of FIG. 1;
FIG. 3 illustrates a cross-sectional view of a combustor body in the liquid oxygen kerosene gas generator provided in FIG. 1;
FIG. 4 shows a cross-sectional view taken along line C-C of FIG. 3;
FIG. 5 shows a left side view of the combustor body provided in FIG. 3;
FIG. 6 shows an enlarged partial schematic view at B in FIG. 2;
FIG. 7 shows a cross-sectional view of a cap in a pintle injection mechanism provided by an embodiment of the present application;
FIG. 8 shows a cross-sectional view of a middle cap in a pintle injection mechanism provided by an embodiment of the present application;
FIG. 9 illustrates a front view of an adjustment needle valve in a pintle injector mechanism of a liquid oxygen kerosene gas generator provided in an embodiment of the present application;
FIG. 10 shows a schematic view in full section of the adjustment needle valve of FIG. 9;
FIG. 11 shows a cross-sectional view of a central rod in a pintle injection mechanism provided by embodiments of the present application.
Description of the main element symbols:
100-liquid oxygen kerosene gas generator; 110-a combustion chamber body; 111-wall body; 1110-an annular flow splitting chamber; 1111-a flow guide channel; 1112-an outflow port; 1113-inlet; 111 a-a first opening; 111 b-a second opening; 112-a combustion chamber; 120-pintle injection mechanism; 120 a-injection end; 121-a seat assembly; 1210-end cap; 1210 a-a limiting hole; 1210 b-an internally threaded hole; 1211-middle cap; 1211 a-a first limit boss; 1211 b-positioning boss; 1211 c-a second limit boss; 1211 d-a shaft hole; 1211 e-liquid oxygen channel; 122-adjusting the needle valve; 1220-a first media flow channel; 1220 a-first media outlet; 1221-a limit tail-bar; 1221 a-mounting holes; 1222-a via hole; 1223-wedge-face; 123-a center pole; 1230-second media flow path; 1230 a-second medium outlet; 1231-a restraining head; 1231 a-hex hole; 1232-external thread; 1233-spiral flow directing structure; 1233 a-helical lobes; 1233 b-helical flow guide groove; 1234-seal groove; 124-flooding plug retainer ring; 125-sealing ring.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example one
Referring to fig. 1 to 6, the liquid oxygen gas fuel gas generator 100 provided in this embodiment may be applied to an engine system in the field of aerospace.
Referring to fig. 1, the liquid oxygen kerosene fuel gas generator 100 provided in the present embodiment includes a combustion chamber body 110 and a pintle injection mechanism 120, wherein the pintle injection mechanism 120 is used for injecting a combustion medium into the combustion chamber body 110, the combustion medium in the combustion chamber body 110 generates high-temperature and high-pressure combustion gas, and the high-temperature and high-pressure combustion gas further expands through a nozzle and reaches turbine blades through a pipeline, so as to drive a turbine pump to work, and provide power for an engine system. That is, the thrust of the engine system can be changed by controlling the injection amount of the pintle injection mechanism 120.
Referring to fig. 2, fig. 3, fig. 4 and fig. 5, the combustion chamber body 110 includes a wall 111 and a combustion chamber 112 surrounded by the wall 111, wherein the combustion chamber 112 is disposed through the wall 111 along an axial direction thereof, and the combustion chamber 112 has a first opening 111a and a second opening 111b formed at two ends of the wall. That is, the first opening 111a is located at one end of the wall 111, and the second opening 111b is located at the other end of the wall 111.
Furthermore, the wall 111 is further provided with a flow inlet 1113 and a flow outlet 1112, the flow inlet 1113 is close to the first opening 111a, the flow outlet 1112 is close to the second opening 111b, and a plurality of flow guide channels 1111 are further disposed in the wall 111, each flow guide channel 1111 is communicated with the flow inlet 1113 and the flow outlet 1112. That is, the guide channel 1111 is disposed along the longitudinal direction of the wall body 111.
In the present embodiment, the inlet 1113 is used for receiving kerosene or liquid oxygen, that is, the kerosene enters from the inlet 1113 and then flows out from the outlet 1112 through the diversion channel 1111, so that when the combustion chamber body 110 performs a combustion operation, the kerosene as a cooling medium exchanges heat with the wall body 111 in the diversion channel 1111 to maintain the temperature of the wall body 111 within a safe range, thereby effectively preventing the combustion chamber body 110 from being burnt due to an excessive temperature.
Optionally, the plurality of flow guide channels 1111 are uniformly distributed along the circumferential direction of the wall body 111, so as to improve the heat exchange efficiency and the heat dissipation effect.
It is understood that the number of the flow guide channels 1111 is determined by the diameter of the wall 111, and the number of the flow guide channels 1111 may be consistent for the wall 111 with different diameters. In some embodiments, the number of the flow guide channels 1111 may be 30, 40, 45, 50 or other numbers, which are only examples and should not be construed as a limitation to the scope of the present application.
Referring to fig. 1, 2, 3 and 6, the pintle nozzle mechanism 120 is disposed on the wall 111, and the pintle nozzle mechanism 120 is located at the second opening 111b, the pintle nozzle mechanism 120 includes a nozzle end 120a, a first medium channel 1220 and a second medium channel 1230, the nozzle end 120a faces the combustion chamber 112, and the first medium channel 1220 is connected to the outlet 1112, that is, kerosene enters the first medium channel 1220 through the outlet 1112.
The first medium channel 1220 is used for conveying kerosene to the injection end 120a, the second medium channel 1230 is used for conveying liquid oxygen to the injection end 120a, and the kerosene and the liquid oxygen are atomized by collision at the injection end 120a, so that the atomization quality is improved, and the combustion efficiency is improved. Meanwhile, the variable thrust adjustment of the engine in a wider range can be realized.
Further, in the present embodiment, the inner diameter of the combustion chamber 112 of the wall 111 to the first opening 111a is gradually reduced to increase the speed of the gas ejected from the first opening 111a, so as to better act on the turbine blade and further improve the power of the engine system.
An annular diversion chamber 1110 is further annularly arranged in the wall body 111, the annular diversion chamber 1110 is close to the first opening 111a, and the annular diversion chamber 1110 is communicated with the inlet of each diversion channel 1111. It can be understood that, kerosene enters from the inlet 1113 and then converges in the annular diversion chamber 1110, and then flows into each diversion channel 1111 from the annular diversion chamber 1110, so that the flow distribution of each diversion channel 1111 is uniform, the heat exchange efficiency is improved, and the heat dissipation effect is good.
Further, the outflow port 1112 is provided as an annular groove, and the annular groove communicates with an outlet of each guide passage 1111. That is, the annular groove serves to collect kerosene flowing out of the outlet of each guide channel 1111.
Referring to fig. 6, in the present embodiment, the injection tip 120a includes a first medium outlet 1220a and a second medium outlet 1230a, the first medium outlet 1220a is communicated with the first medium channel 1220, the second medium outlet 1230a is communicated with the second medium channel 1230, that is, kerosene is ejected from the first medium outlet 1220a, liquid oxygen is ejected from the second medium outlet 1230a, and the ejected kerosene and liquid oxygen collide with each other to be atomized.
Referring to fig. 2 and fig. 6, in detail, the pintle injecting mechanism 120 includes a seat assembly 121, an adjusting needle valve 122, and a central rod 123.
The seat body assembly 121 is detachably connected to the wall body 111, and in some embodiments, the seat body assembly 121 is connected to the wall body 111 by bolts, and the number of the bolts is plural and is distributed along the circumferential direction of the seat body.
The center rod 123 is inserted into the seat assembly 121, one end of the center rod 123 far away from the combustion chamber body 110 is connected to the seat assembly 121, and the other end of the center rod 123 faces the combustion chamber 112 of the combustion chamber body 110.
The adjustment needle 122 is slidably sleeved on the central rod 123, that is, the adjustment needle 122 can only move in an axial direction, and the radial movement thereof is limited.
Referring to fig. 6, 7 and 8, the seat assembly 121 includes a middle cap 1211 and an end cap 1210, the middle cap 1211 and the end cap 1210 are disposed along an axial direction of the wall 111, the middle cap 1211 is disposed between the end cap 1210 and the wall 111, a space for accommodating the central rod 123 and the adjusting needle 122 is formed between the end cap 1210 and the middle cap 1211, a limiting hole 1210a is disposed on an end surface of the end cap 1210, and the limiting hole 1210a is used for adjusting axial limiting of the needle 122.
Referring to fig. 7, 9 and 10, in some embodiments, the number of the limiting holes 1210a is two, the limiting holes are crescent-shaped, two limiting tail rods 1221 are disposed on the corresponding adjusting needle valve 122, the cross section of the limiting tail rods 1221 along the thickness direction is crescent-shaped, and the limiting tail rods 1221 are inserted into the limiting holes 1210 a. The end of the limiting tail rod 1221 far away from the adjusting needle valve 122 is further provided with a mounting hole 1221a connected with an external driving part, and the driving part can drive the adjusting needle valve 122 to move along the axial direction.
Referring to fig. 7 and 11, the end cap 1210 of the seat assembly 121 is further provided with an internal threaded hole 1210b, the internal threaded hole 1210b is located between the two limiting holes 1210a, and an external thread 1232 is provided at an end of the central rod 123 away from the combustion chamber body 110, that is, the central rod 123 is in threaded engagement with the end cap 1210.
Referring to fig. 6 and fig. 11, further, a limiting head 1231 is further disposed at an end of the central rod 123 facing the combustion chamber 112, an outer diameter of the limiting head 1231 is larger than an outer diameter of a shaft of the central rod 123, and a hexagonal hole 1231a is disposed at an end of the limiting head 1231 for facilitating the installation and removal of the central rod 123.
Referring to fig. 6, 7 and 8, the middle cap 1211 of the seat body assembly 121 sequentially includes a first limit boss 1211a, a positioning boss 1211b and a second limit boss 1211c along an axial direction, wherein an outer diameter of the positioning boss 1211b is greater than the first limit boss 1211a and the second limit boss 1211c, that is, the middle cap 1211 is similar to a stepped shaft, the middle cap 1211 is further provided with a stepped shaft hole 1211d along the axial direction, and the shaft hole 1211d is provided for facilitating the adjustment of the needle valve 122 passing through the central shaft 123.
When the middle cover 1211 is installed, the first limit boss 1211a is embedded in the wall body 111, and a first shaft shoulder formed by the first limit boss 1211a and the positioning boss 1211b realizes the positioning of the middle cover 1211 on the wall body 111; the second limit boss 1211c is embedded into the bottom cover, and a second shoulder formed by the second limit boss 1211c and the positioning boss 1211b realizes the positioning of the end cover 1210 on the middle cover 1211.
Furthermore, a liquid oxygen passage 1211e is disposed on the positioning boss 1211b of the middle cap 1211, and the liquid oxygen passage 1211e is communicated with the shaft hole 1211 d.
Near the injection end 120a, the adjusting needle 122 is respectively engaged against the wall 111 and the central rod 123, wherein the adjusting needle 122 is engaged against the wall 111, and when the adjusting needle 122 moves away from the wall 111, the adjusting needle 122 forms an annular first medium outlet 1220a with the wall 111; the adjustment needle 122 engages against a shoulder of the stop head 1231 of the central rod 123, and when the adjustment needle 122 moves away from the wall 111, the adjustment needle 122 and the shoulder of the stop head 1231 form an annular first medium outlet 1220 a.
Referring to fig. 6, 9 and 10, in some embodiments, a wedge 1223 is disposed on a side of the adjusting needle 122 opposite to the wall 111, and the wedge 1223 controls a direction of the kerosene injected from the first medium outlet 1220 a.
Further, a first medium flow passage 1220 is formed between the outer cylindrical surface of the adjustment needle valve 122 and the wall body 111, and a second medium flow passage 1230 is formed between the inner cylindrical surface of the adjustment needle valve 122 and the central rod 123. The first medium flow channel 1220 and the second medium flow channel 1230 are both annular flow channels, the first medium flow channel 1220 is communicated with the outflow port 1112 on the wall body 111, and the second medium flow channel 1230 is communicated with the liquid oxygen channel 1211 e.
The adjustment needle valve 122 has a sleeve-type structure, and the adjustment needle valve 122 is provided with a plurality of peroxide holes 1222 in the circumferential direction. The position of the adjusting needle valve 122, which is provided with the peroxy holes 1222, corresponds to the liquid oxygen channel 1211e, and the peroxy holes 1222 realize the communication between the liquid oxygen channel 1211e and the second medium flow passage 1230.
Alternatively, the plurality of oxygen passing holes 1222 are uniformly distributed along the circumferential direction of the regulating needle valve 122, so that the liquid oxygen more uniformly enters the second medium flow passage 1230.
Referring to fig. 6, 10 and 11, in order to ensure the independence between the first medium flow passage 1220 and the second medium flow passage 1230, the adjusting needle 122 is provided with a flooding plug retainer 124, and the flooding plug retainer 124 is located between the middle cap 1211 and the wall 111. Meanwhile, in order to avoid leakage of the second medium flow passage 1230, a seal ring 125 is disposed between the central rod 123 and the adjusting needle valve 122, a seal groove 1234 for accommodating the seal ring 125 is correspondingly disposed on the central rod 123, and the seal groove 1234 is close to one end of the central rod 123, at which the external thread 1232 is disposed.
Further, a spiral flow guiding structure 1233 is further arranged on the central rod 123, specifically, the spiral flow guiding structure 1233 includes spiral convex teeth 1233a, spiral flow guiding grooves 1233b are formed between the spiral convex teeth 1233a, and the outer diameter of the spiral convex teeth 1233a is larger than the rod body diameter of the central rod 123, so as to realize the radial positioning of the needle valve 122. The spiral guide groove 1233b may generate a swirling flow effect when the liquid oxygen is ejected from the second medium outlet 1230a, so as to enhance the atomization effect of the injection end 120 a.
In the embodiment, the combustion chamber body 110 and the pintle injection mechanism 120 are tightly combined together, so that an integrated design is realized, the overall structure is more compact, and the installation space is saved.
Further, in the present embodiment, the opening degrees of the first medium outlet 1220a and the second medium outlet 1230a are changed in proportion. Optionally, the first media outlet 1220a is smaller than the second media outlet 1230a by an opening degree.
Wherein the opening width of the first medium outlet 1220a is set to be L, the opening width of the second medium outlet 1230a is set to be H, and the included angle formed between the jetting direction of the first medium outlet 1220a and the axial direction of the central rod 123 of the pintle injector mechanism is set to be α, and the following conditions are satisfied: l ═ H × sin α. Wherein, different alpha values can be selected and set according to different Momentum ratios TMR (Total Momentum ratio).
Thus, by driving the regulating needle valve 122 to move in the axial direction, the opening degrees of the first medium outlet 1220a and the second medium outlet 1230a may be changed in proportion.
In the liquid oxygen kerosene gas generator 100 provided by the embodiment, when the liquid oxygen kerosene gas generator 100 works, the kerosene passes through the flow guide channel 1111 and then enters the first medium flow channel 1220, so that the kerosene is used as a cooling medium for the combustion chamber body 110, thrust can be provided for the engine after combustion, the combustion chamber body 110 is cooled by the kerosene, the problem that the combustion chamber body 110 is burnt due to overhigh gas temperature is avoided, and the performance of the engine is improved.
Meanwhile, in the liquid oxygen kerosene fuel gas generator 100 provided by the embodiment, the pintle injection mechanism 120 is adopted to inject fuel into the combustion chamber 112, and the combustion efficiency is improved by utilizing the adjustable advantage of the pintle injection mechanism 120, so that the variable thrust adjustment of the engine in a wider range is realized.
Therefore, the liquid oxygen kerosene gas generator 100 provided by the present embodiment at least includes the following advantages:
1. in the liquid oxygen kerosene fuel gas generator 100 provided by the embodiment, the kerosene is used as a cooling medium to cool the combustion chamber body 110, so that the liquid oxygen kerosene fuel gas generator 100 can adapt to a severe working environment, ablation and local overheating are avoided, and the reliability is improved.
2. The structure is compact, the space is saved, the pintle injection mechanism 120 and the combustion chamber body 110 are combined together through an integrated design, and the material is saved while the function is ensured to be realized.
3. By adopting the pintle injection mode of the pintle injection mechanism 120, the thrust of the gas generator can be adjusted in a large range, and meanwhile, the working efficiency can be ensured in variable working conditions, so that the variable thrust adjustment of the engine in a larger range is realized.
4. By adjusting the design of the wedge 1223 of the needle valve 122, the liquid oxygen and kerosene passages have a fixed geometric relationship and can be adjusted proportionally. And simultaneously, different alpha angles are selected and designed under different conditions to obtain good injection effect.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A liquid oxygen gas fuel gas generator is characterized by comprising a combustion chamber body and a pintle jetting mechanism;
the combustion chamber body comprises a wall body and a combustion chamber formed by the wall body in a surrounding mode, the combustion chamber penetrates through the wall body along the axis direction of the wall body, a first opening and a second opening are formed in two ends of the wall body respectively, a flow inlet and a flow outlet are further formed in the wall body, the flow inlet is close to the first opening, the flow outlet is close to the second opening, a plurality of flow guide channels are arranged in the wall body, each flow guide channel is communicated with the flow inlet and the flow outlet, the flow outlet is arranged to be an annular groove, and the annular groove is communicated with an outlet of each flow guide channel;
the pintle injection mechanism is arranged on the wall body and is positioned at the second opening, the pintle injection mechanism comprises an injection end, a first medium channel and a second medium channel, the injection end faces the combustion cavity, and the first medium channel is connected with the outflow port;
the first medium channel is used for conveying kerosene to the injection end, the second medium channel is used for conveying liquid oxygen to the injection end, and the kerosene and the liquid oxygen are subjected to impact atomization at the injection end.
2. A liquid oxygen kerosene gas generator according to claim 1, wherein a plurality of said flow guide channels are evenly distributed along the circumference of said wall.
3. The liquid oxygen kerosene gas generator of claim 1, wherein an inner diameter of said combustion chamber to said first opening is tapered.
4. A liquid oxygen kerosene gas generator as recited in claim 1, wherein an annular flow diversion chamber is further provided annularly within said wall body, said annular flow diversion chamber being adjacent to said first opening, said annular flow diversion chamber communicating with an inlet of each of said flow diversion passages.
5. The liquid oxygen kerosene fuel gas generator according to claim 1, wherein said injection end includes a first medium outlet and a second medium outlet, said first medium outlet communicating with said first medium flow passage, said second medium outlet communicating with said second medium flow passage;
wherein the opening degrees of the first medium outlet and the second medium outlet are changed in proportion.
6. A liquid oxygen kerosene gas generator according to claim 5, wherein the opening width of said first medium outlet is set to L, the opening width of said second medium outlet is set to H, and the angle formed between the injection direction of said first medium outlet and the axial direction of the central rod of said pintle injection mechanism is set to α, and the following conditions are satisfied: l ═ H × sin α.
7. The liquid oxygen kerosene fuel gas generator according to any one of claims 1-6, wherein said pintle injection mechanism comprises a seat assembly, an adjustment needle valve, and a central rod;
the seat body component is detachably connected with the wall body;
the central rod is inserted in the seat body assembly;
the adjusting needle valve is sleeved on the central rod in a sliding mode and is close to the injection end, the adjusting needle valve is matched with the wall body and the central rod in an abutting mode respectively, the first medium flow channel is formed between the outer cylindrical surface of the adjusting needle valve and the wall body, and the second medium flow channel is formed between the inner cylindrical surface of the adjusting needle valve and the central rod.
8. The liquid oxygen kerosene fuel gas generator of claim 7, wherein said central rod is provided with a helical flow guide structure.
9. The oxyhydrogen kerosene gas generator according to claim 7, wherein the base assembly comprises a middle cover and an end cover, the middle cover and the end cover are disposed along an axial direction of the wall body, the middle cover is disposed between the end cover and the wall body, a space for accommodating the center rod and the adjusting needle valve is formed between the end cover and the middle cover, a limit hole is disposed on an end surface of the end cover, and the limit hole is used for axial limit of the adjusting needle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110231600.9A CN112984556B (en) | 2021-03-02 | 2021-03-02 | Liquid oxygen gas fuel gas generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110231600.9A CN112984556B (en) | 2021-03-02 | 2021-03-02 | Liquid oxygen gas fuel gas generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112984556A CN112984556A (en) | 2021-06-18 |
| CN112984556B true CN112984556B (en) | 2022-05-06 |
Family
ID=76352118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110231600.9A Active CN112984556B (en) | 2021-03-02 | 2021-03-02 | Liquid oxygen gas fuel gas generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112984556B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2291546Y (en) * | 1997-01-10 | 1998-09-16 | 刘树范 | Floating wedge sluice valve |
| US6272847B1 (en) * | 1999-12-01 | 2001-08-14 | Carl C. Dietrich | Centrifugal direct injection engine |
| US6405536B1 (en) * | 2000-03-27 | 2002-06-18 | Wu-Chi Ho | Gas turbine combustor burning LBTU fuel gas |
| CN102518534B (en) * | 2011-12-30 | 2014-01-29 | 中国人民解放军国防科学技术大学 | Heating device of hydrocarbon fuel |
| CA3006361A1 (en) * | 2015-12-04 | 2017-07-06 | Jetoptera, Inc. | Micro-turbine gas generator and propulsive system |
| CN106184742A (en) * | 2016-09-18 | 2016-12-07 | 厦门大学 | A kind of supersonic vehicle air intake duct microchannel cooling system |
| CN111022218B (en) * | 2019-12-31 | 2022-02-15 | 西北工业大学 | Hydrogen peroxide kerosene variable working condition thrust chamber adopting pintle injector |
-
2021
- 2021-03-02 CN CN202110231600.9A patent/CN112984556B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112984556A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7527068B2 (en) | Valve with swirling coolant | |
| US11549429B2 (en) | Engine mixing structures | |
| CN105765305B (en) | Fuel nozzle with fluid lock and purger | |
| US11008932B2 (en) | Engine mixing structures | |
| CN112065567B (en) | Engine combustion system | |
| JP2007093200A (en) | Coking preventive type injector arm | |
| JP4204057B2 (en) | Cooling device for pilot fuel injection valve for gas engine | |
| WO2018168747A1 (en) | Combustor nozzle, combustor, and gas turbine | |
| CN112984556B (en) | Liquid oxygen gas fuel gas generator | |
| US6349697B1 (en) | Direct-fuel-injection-type spark-ignition internal combustion engine and method of controlling the internal combustion engine | |
| CN113551265A (en) | Fuel nozzle and gas turbine | |
| KR101251395B1 (en) | A fuel valve for large two stroke diesel engines | |
| CN115419519B (en) | Variable-thrust needle-bolt type injector | |
| CN114838385B (en) | Self-diverting composite cooling combustion chamber | |
| CN110475963B (en) | Thrust chamber arrangement and method for operating a thrust chamber arrangement | |
| CN112610360B (en) | Liquid rocket engine and pintle injector thereof | |
| CN115387933A (en) | Variable thrust liquid rocket engine with adjustable combustion cavity and combustion cavity adjusting method | |
| EP4348027A1 (en) | Pre-chamber and internal combustion engine | |
| CN113108314A (en) | On-duty fuel nozzle tip, fuel nozzle and gas turbine | |
| CN110005558B (en) | Carbon deposition prevention fuel injection device | |
| KR20160042846A (en) | Cylinder head for a self-igniting internal combustion engine | |
| CN113137635B (en) | On-duty fuel nozzle tip, fuel nozzle, and gas turbine | |
| KR102472925B1 (en) | Pintle Injector | |
| CN114877376B (en) | Dual-channel detonation combustion chamber | |
| US20240183538A1 (en) | Combustor and gas turbine including same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yu Nanjia Inventor after: Han Shudao Inventor after: Zhou Chuang Inventor after: Gong Haojie Inventor after: Zhang Yuanjun Inventor after: Li Tianwen Inventor after: Long Zhiguang Inventor after: Zhao Yaming Inventor after: Zhao Zeng Inventor after: Wang Shuwen Inventor after: Ren Jie Inventor after: Feng Hao Inventor before: Zhang Yuanjun Inventor before: Han Shudao Inventor before: Zhou Chuang Inventor before: Gong Haojie Inventor before: Yu Nanjia Inventor before: Long Zhiguang Inventor before: Li Tianwen Inventor before: Zhao Yaming Inventor before: Zhao Zeng Inventor before: Wang Shuwen Inventor before: Ren Jie Inventor before: Feng Hao |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |