CN110498047B - Precooler head, precooler and environment control system - Google Patents
Precooler head, precooler and environment control system Download PDFInfo
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- CN110498047B CN110498047B CN201910707826.4A CN201910707826A CN110498047B CN 110498047 B CN110498047 B CN 110498047B CN 201910707826 A CN201910707826 A CN 201910707826A CN 110498047 B CN110498047 B CN 110498047B
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 6
- 239000013618 particulate matter Substances 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 51
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
- F28F11/02—Arrangements for sealing leaky tubes and conduits using obturating elements, e.g. washers, inserted and operated independently of each other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
- B64D2013/0603—Environmental Control Systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/50—On board measures aiming to increase energy efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention provides a precooler seal head, a precooler with the precooler seal head and an environment control system with the precooler. The precooler head is installed at a precooler outlet for cooling high-temperature gas introduced from upstream equipment, and includes a casing and a fan disposed in the casing. The housing has an inlet end configured to connect to the body of the precooler and an outlet end configured to connect to the downstream conduit of the precooler; the fan includes a plurality of fixedly disposed centrifugal blades configured to create a rotating airflow as the air flows through the fan. According to the precooler end socket, the precooler and the environment control system provided by the invention, hot air flow can be quickly and uniformly mixed when being discharged from the precooler, and the temperature sensor at the downstream of the precooler can accurately sense the temperature of the air flow on the premise of not occupying extra space and increasing the weight at the outlet of the precooler.
Description
Technical Field
The invention relates to the field of aircrafts and aircraft maintenance and manufacturing, in particular to a precooler seal head, a precooler comprising the precooler seal head and an environment control system comprising the precooler.
Background
Among the constituent systems of an aircraft, an aircraft environmental control system, which is one of important onboard systems, is responsible for providing a comfortable air environment for onboard personnel by controlling parameters such as temperature, humidity, flow rate, pressure, etc. of air in a cabin, thereby providing a sufficiently comfortable living and working environment for crew members and passengers. The most main air source of the environment control system is bleed air from an aircraft engine, and high-temperature compressed air led out from the engine can be supplied to downstream equipment after being cooled and adjusted to a proper temperature value through a precooler, so that the air consumption requirements of a downstream air conditioning system, a wing and an engine anti-icing system and the like are ensured. Precoolers are usually made up of a main body section for gas heat exchange and a header for connection of the transition body section to a high pressure conduit. A temperature sensor is typically installed downstream of its hot-side outlet to provide closed-loop control of the outlet temperature.
Along with the continuous improvement of engine technology, the temperature of bleed air rises, and the precooler used by the current civil aircraft is generally a cross-flow heat exchanger, the temperature distribution of the outlet is extremely uneven, the temperature of the outlet can be distributed between 100 ℃ and 400 ℃, and the measurement of the average temperature of the outlet is adversely affected.
The current methods for solving this problem mainly include the following three categories, which are specifically described as follows:
1. the temperature sensor arranged at the downstream of the precooler is far away from the outlet of the precooler, and the average temperature is measured after the gas is uniformly mixed, so that the scheme has more accurate measurement on the temperature, but has higher requirement on the arrangement of a downstream pipeline, thereby having higher production and manufacturing cost;
2. the scheme has high requirement on the space of the outlet of the precooler, and the plurality of sensors are ensured to be arranged in enough space and can increase the weight by arranging the plurality of sensors;
3. the ground bench test is combined with CFD flow field simulation, a point which is approximate to the average outlet temperature is selected as a measuring point of the outlet temperature value, the bench test needs to be carried out, the investment time is long, and the selected point cannot meet the average temperature values under different bleed air flows at the same time, so that the measurement deviation is large under different conditions.
In addition, the airplane can face various severe meteorological conditions in use, and the accumulation of pollutants such as sand and dust in the environment control equipment can be often found in the maintenance of the airplane, so that the abrasion of a valve moving mechanism of the airplane is accelerated, and the service life of the equipment is shortened.
Accordingly, there is a need to provide a precooler head, a precooler including the precooler head, and an environmental control system including the precooler to at least partially address the above-mentioned problems.
Disclosure of Invention
The invention mainly aims to provide a precooler end socket, a precooler with the precooler end socket and an environment control system with the precooler, so that hot air can be quickly and uniformly mixed when being discharged from the precooler, convenience is provided for arrangement of a temperature sensor, the temperature sensor at the downstream of the precooler can accurately sense the temperature of air flow on the premise of not occupying extra space and not increasing the weight at the outlet of the precooler, and the outlet temperature of hot air can be accurately adjusted according to a sensing result so as to meet the air using requirements of systems such as a downstream air conditioner, ice prevention and the like.
In one aspect, the present invention provides a precooler header for mounting on a precooler outlet, the precooler being configured to cool a high-temperature gas introduced from upstream equipment, the precooler header comprising:
a housing having an inlet end configured to connect to the body of the precooler and an outlet end configured to connect to a downstream conduit of the precooler;
a fan disposed within the housing, the fan including a plurality of fixedly disposed centrifugal blades configured to create a rotating airflow as air flows through the fan.
In one embodiment, the vanes have a streamlined design with a curvature such that the airflow passing over the vanes is deflected.
In one embodiment, any two adjacent blades have overlapping portions in projection perpendicular to the direction of flow of the gas in the housing.
In one embodiment, the precooler head further comprises a blowdown zone disposed at the outlet end, the blowdown zone configured to enable particulate matter in the airflow to be thrown by the fan to the blowdown zone.
In one embodiment, the waste region includes an inner side wall of the housing and a first blocking wall disposed at the outlet end of the housing and extending inwardly of the housing in a direction perpendicular to the inner side wall.
In one embodiment, the waste region further comprises a second blocking wall extending from an end of the first blocking wall remote from the inner side wall of the housing towards the inlet end of the housing.
In one embodiment, the dirt discharge area is provided with a dirt discharge outlet in the wall of the housing, and the particles in the dirt discharge area can slide to the dirt discharge outlet under the action of gravity and air pressure and are discharged through the dirt discharge outlet.
In one embodiment, a gap exists between any adjacent two of the vanes in a plane perpendicular to the direction of gas flow within the housing, and the gap can be sized according to the size of the particles to be filtered.
In one embodiment, the projected total area of the plurality of vanes in a plane perpendicular to the direction of gas flow within the housing is adapted to the cross-sectional area of the gas passage.
In one embodiment, each of the blades is the same shape and size, and the plurality of blades are evenly arranged around the center of the fan.
In one embodiment, the fan is mounted within the housing at a location proximate the front end.
According to another aspect of the present invention, there is provided a precooler for cooling high-temperature gas introduced from an upstream apparatus, the precooler including:
a precooler body for gas heat exchange and including a hot-side inlet, a hot-side outlet, a cold-side inlet and a cold-side outlet; and
the precooler head according to any one of the above aspects, the precooler head being mounted at the hot-edge outlet of the precooler body,
wherein the precooler is configured such that hot air exhausted from the engine enters the precooler body via the hot-side inlet and mixes within the precooler body with cold air exhausted via the cold-side inlet and exits the precooler from the hot-side outlet via the precooler head.
In one embodiment, the precooler further comprises an inlet head connected between the engine and the precooler body.
According to a further aspect of the present invention, there is provided an environmental control system for an aircraft, comprising:
a precooler according to either of the two previous aspects;
a temperature sensor disposed downstream of the hot-side outlet of the precooler and configured to sense a temperature of the airflow thereat; and
a control device configured to be communicatively connected with the temperature sensor and capable of controlling the precooler according to a sensing result of the temperature sensor.
In one embodiment, an intake valve is provided at the cold-side inlet of the precooler body, and the control device is configured to control the opening degree of the intake valve in accordance with the sensing result.
According to the precooler end socket, the precooler and the environment control system provided by the invention, gas can be uniformly mixed conveniently, quickly and efficiently when passing through the fixedly arranged centrifugal fan, so that the temperature sensor arranged at the downstream of the precooler can accurately sense the temperature of hot gas flow, and the outlet temperature of hot gas can be accurately adjusted according to the sensing result, thereby meeting the gas use requirements of systems such as a downstream air conditioner, anti-icing system and the like. And such an arrangement is easy to implement, has a low cost, does not occupy additional space, and does not increase the weight at the precooler outlet. Meanwhile, the invention can filter out the particulate matters in the gas, thereby reducing the possibility of faults caused by the pollutants entering downstream equipment.
Drawings
For a better understanding of the above and other objects, features, advantages and functions of the invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals in the drawings refer to like parts. It will be appreciated by persons skilled in the art that the drawings are intended to illustrate preferred embodiments of the invention without any limiting effect on the scope of the invention, and that the various components in the drawings are not drawn to scale.
FIG. 1 is a perspective schematic view of a precooler according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a fan within the outlet head of the precooler in FIG. 1;
FIG. 3 is a schematic view of the blades of the fan of FIG. 2;
FIG. 4 is a top cross-sectional view of the outlet head of the precooler in FIG. 1;
fig. 5 is a schematic diagram of the precooler and its downstream piping in this embodiment.
Detailed Description
Reference will now be made in detail to the present embodiments of the invention, with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment in accordance with the present invention and other ways of practicing the invention will occur to those skilled in the art and are within the scope of the invention.
In a preferred embodiment of the invention, a precooler head for use in an aircraft, a precooler 1 comprising the precooler head and an environmental control system comprising the precooler 1 are provided.
Specifically, the precooler 1 is used to cool high-temperature gas introduced from an upstream apparatus (for example, an engine). As shown in fig. 1, the precooler 1 includes a precooler body 2, and the precooler body 2 is provided with a hot-side inlet 21, a hot-side outlet 22, a cold-side inlet 23 and a cold-side outlet 24, the hot-side outlet 22 is used for receiving hot air from upstream equipment, and the hot air is mixed with cold air entering and exiting through the cold-side inlet 23 and the cold-side outlet 24 in the precooler body 2 so as to be cooled and discharged from the hot-side outlet 22. The flow direction of the cold air is indicated by the wide arrows in fig. 1, and the flow direction of the hot air is indicated by the thin arrows marked D1.
The precooler body 2 is connected with the high-pressure pipelines upstream and downstream through an inlet seal head 4 and an outlet seal head 3 respectively, and in the invention, the term "precooler seal head" refers to the outlet seal head 3 of the precooler 1 in particular.
Referring to fig. 2 to 4, the outlet head 3 of the precooler 1 includes a housing 32 having an inlet end and an outlet end and a fan 31 disposed within the housing 32. The inlet end of casing 32 is connected to precooler body 2 and the outlet end of casing 32 is connected to downstream conduit 6 of precooler 1, so that a passage for gas communication is formed in casing 32. The fan 31 comprises a plurality of fixedly arranged centrifugal blades 311, all blades 311 being arranged substantially in a plane perpendicular to the general gas flow direction D1, such that a rotating gas flow is formed when gas flows through the fan 31. It should be noted that each of the blades 311 has an arc shape (which will be described in detail later) that is concave or convex in the general gas flow direction D1, and thus each of the blades 311 is not a planar structure, and therefore does not completely lie in a plane perpendicular to the general gas flow direction D1.
In the present embodiment, the fan 31 having the fixed centrifugal blades 311 is disposed in the outlet head 3 of the precooler 1, so that the hot air flow can be uniformly mixed conveniently, quickly and efficiently, and the temperature sensor 5 disposed downstream of the precooler 1 can accurately sense the temperature of the hot air flow.
Preferably, as can be seen from fig. 2 and 3, the blades 311 have a concave or convex curvature in the general gas flow direction D1, i.e. the blades 311 are formed as a streamlined design with a curvature, and the plurality of gas flow branches are deflected at the position of the curvature of each blade 311, so that a total rotating gas flow is formed. It should be noted that the "general gas flow direction" mentioned in the present invention refers to the direction D1 as shown in fig. 1 and 4, which is different from the flow direction of the gas flow branch capable of deflecting at the blade 311.
More preferably, referring to fig. 3, in the total gas flow direction D1, any adjacent two vanes 311 have portions 311a and 311b where projections thereof overlap each other at their adjoining. This arrangement allows the gas to pass through the gap between the overlapping portions 311a and 311b, thereby further deflecting the gas flow.
It can be understood that if two adjacent blades 311 in the total gas flow direction D1 do not have a portion overlapping each other, that is, if a gap exists between two adjacent blades 311 in a plane perpendicular to the total gas flow direction D1, a portion of the gas flow can directly pass through the gap along the total gas flow direction D1, and the portion of the gas flow is not deflected, which is not favorable for mixing of the gas flows. The arrangement of this embodiment can avoid this. In addition, the arrangement of this embodiment can also block particles with any diameter, and the particles are thrown into the sewage draining area 35 by the blades 311 (which will be described in detail later).
Of course, in other embodiments, not shown, there may be a small gap between two adjacent vanes in a plane perpendicular to the general gas flow direction, so that a portion of the particles with smaller diameters passes through the gap. Further, the gap between adjacent vanes may be adjusted according to the diameter of the particulate matter to be filtered.
On the other hand, in the present embodiment, the projected total area of all the vanes 311 on the plane perpendicular to the gas flow direction D1 is adapted to the sectional area of the gas passage so that the total area of all the vanes 311 on the plane perpendicular to the gas flow direction D1 reaches the maximum value, which enables more efficient mixing of the gases. Also, the shape and size of each blade 311 are substantially the same, and each blade 311 is arranged to surround the center of the fan 31 uniformly, such an arrangement enables the deflection angles of the branches of each air flow at each blade 311 to be substantially the same, thereby enabling a uniform rotating air flow to be formed. For example, in the present embodiment, the blades 311 have six substantially fan-shaped configurations, and the angle between the center lines of two adjacent blades 311 (the center lines being lines connecting the center points and the centers of the arcs of the fan-shaped configurations) is substantially 60 °.
Preferably, the fan 31 is disposed at an upstream position within the housing 32 in the general gas flow direction D1, i.e., at a position near the front end within the housing 32. This arrangement allows for thorough mixing of the gas as soon as it enters the outlet head 3.
Further, with reference to fig. 4, the outlet head 3 further comprises a drainage area 35 provided at its outlet end. The distance between the dirt discharge area 35 and the fan 31 is set such that particulate matter in the airflow can be thrown by the fan 31 to the dirt discharge area 35. As the waste region 35 can be understood as a sliding groove around the outlet end of the outlet head 3, particles anywhere within the waste region 35 can slide along the sliding groove to the bottom of the waste region 35 under the influence of gravity and gas pressure. More preferably, the waste area 35 may be provided with a waste outlet 36 on the housing 32, through which waste outlet 36 the particulate matter sliding thereto may be discharged.
With continued reference to fig. 4, it can be seen that the inner side wall of the housing 32 is provided at the outlet end with a first blocking wall 33 extending inwardly (i.e. towards the axis of the gas channel) perpendicular to the general gas flow direction D1, the presence of the first blocking wall 33 being such as to block particles thrown thereto, so that the first blocking wall 33 and the housing 32 in fact together define a relatively simple waste area 35. Of course, it is further preferred that a second blocking wall 34 extending in the opposite direction to the general gas flow direction D1 (i.e. towards the inlet end of the outlet head 3) is also provided at the end of the first blocking wall 33 remote from the housing 32, the first blocking wall 33 and the second blocking wall 34 together defining a blow-off area 35 in this embodiment. In other words, the housing 32 has a section of annular wall at the outlet end that is bent back, thereby forming an annular pocket, i.e., the waste area 35, therein.
In another aspect, the present embodiment further provides an environment control system including the precooler 1. The climate control system further comprises a temperature sensor 5 and a control device (not shown). A temperature sensor 5 is provided at the downstream outlet of the precooler 1 and is configured to sense the temperature of the airflow thereat. For example, as shown in fig. 5, the temperature sensor 5 may be mounted on the downstream pipe 6 of the precooler 1.
The control device is communicatively connected to the temperature sensor 5 and is capable of controlling the precooler 1, in particular, the rate of cold air discharge of the precooler body 2, in accordance with the sensing result of the temperature sensor 5. For example, an air inlet valve may be disposed at the cold side inlet 23 of the precooler main body 2, and when the temperature sensor 5 senses that the temperature of the air flow is higher, the control device may control the opening degree of the air inlet valve to increase the speed of discharging the cold air according to the sensing result; when the temperature sensor 5 senses that the temperature of the air flow is low, the control device may appropriately adjust the opening degree of the intake valve small according to the sensing result.
According to the precooler end socket, the precooler and the environment control system provided by the invention, gas can be uniformly mixed conveniently, quickly and efficiently when passing through the fixedly arranged centrifugal fan, so that the temperature sensor arranged at the downstream of the precooler can accurately sense the temperature of hot gas flow, and the outlet temperature of hot gas can be accurately adjusted according to the sensing result, thereby meeting the gas use requirements of systems such as a downstream air conditioner, anti-icing system and the like. The arrangement is easy to realize, the cost is low, the requirements on the number of downstream pipelines and sensors are reduced, extra space cannot be occupied, and the weight of the outlet of the precooler cannot be increased. Meanwhile, the invention can also filter out the particulate matters in the gas, thereby reducing the possibility of the fault caused by the pollutants entering the downstream equipment.
The foregoing description of various embodiments of the invention is provided for the purpose of illustration to one of ordinary skill in the relevant art. It is not intended that the invention be limited to a single disclosed embodiment. As mentioned above, many alternatives and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the above teachings. Thus, while some alternative embodiments are specifically described, other embodiments will be apparent to, or relatively easily developed by, those of ordinary skill in the art. The present invention is intended to embrace all such alternatives, modifications and variances of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention as described above.
List of component reference numbers:
precooler 1
Cold side outlet 24
Inlet head 4
Outlet head 3
Temperature sensor 5
A downstream conduit 6.
Claims (12)
1. A precooler head for mounting on a precooler outlet, the precooler being for cooling high-temperature gas directed from upstream equipment, the precooler head comprising:
a housing having an inlet end configured to connect to the body of the precooler and an outlet end configured to connect to a downstream conduit of the precooler;
a fan disposed within the housing, the fan including a plurality of fixedly disposed centrifugal blades configured to create a rotating airflow as air flows through the fan; and
a waste region disposed at the outlet end, the waste region including an inner side wall of a housing and a first blocking wall disposed at the outlet end of the housing and extending inwardly of the housing in a direction perpendicular to the inner side wall,
wherein the blades have a streamline design with a radian, so that the airflow flowing through the blades is deflected, and projections of any two adjacent blades in a direction perpendicular to the flowing direction of the gas in the shell have overlapped parts.
2. The precooler head of claim 1, wherein the blowdown area is configured to enable particulate matter in the airflow to be thrown by the fan to the blowdown area.
3. The precooler header of claim 1, wherein the blowdown area further comprises a second blocking wall extending from an end of the first blocking wall distal from the inner side wall of the housing toward the inlet end of the housing.
4. A precooler head as claimed in any one of claims 2 to 3 wherein the blowdown area is provided with a blowdown port located on the housing wall, particles in the blowdown area being able to slide to and be discharged via the blowdown port under the influence of gravity and air pressure.
5. The precooler head of any one of claims 2-3, wherein a gap exists between any two adjacent vanes in a plane perpendicular to the direction of gas flow within the housing, and the gap can be sized according to the size of particles to be filtered.
6. The precooler head of claim 1, wherein a projected total area of the plurality of blades in a plane perpendicular to a direction of gas flow within the housing is adapted to a cross-sectional area of the gas passage.
7. The precooler head of claim 1, wherein each of the blades is identical in shape and size, and wherein the plurality of blades are evenly arranged around the fan center.
8. The precooler head of claim 1, wherein the fan is mounted within the housing at a location proximate the front end.
9. A precooler for cooling a high-temperature gas directed from an upstream plant, the precooler comprising:
a precooler body for gas heat exchange and including a hot-side inlet, a hot-side outlet, a cold-side inlet and a cold-side outlet; and
the precooler head of any one of claims 1-8, mounted at the hot-side outlet of the precooler body,
wherein the precooler is configured such that hot gas discharged from the engine enters the precooler body via the hot-side inlet and mixes within the precooler body with cold gas discharged via the cold-side inlet and exits the precooler from the hot-side outlet via the precooler head.
10. The precooler of claim 9, further comprising an inlet head connected between the engine and the precooler body.
11. An environmental control system for an aircraft, comprising:
the precooler according to claim 9 or 10;
a temperature sensor disposed downstream of the hot-side outlet of the precooler and configured to sense a temperature of the airflow thereat; and
a control device configured to be communicatively connected with the temperature sensor and capable of controlling the precooler according to a sensing result of the temperature sensor.
12. The environmental control system according to claim 11, wherein an intake valve is provided at the cold-side inlet of the precooler body, and the control device is configured to control the opening degree of the intake valve in accordance with the sensing result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707826.4A CN110498047B (en) | 2019-08-01 | 2019-08-01 | Precooler head, precooler and environment control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910707826.4A CN110498047B (en) | 2019-08-01 | 2019-08-01 | Precooler head, precooler and environment control system |
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| Publication Number | Publication Date |
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| CN110498047A CN110498047A (en) | 2019-11-26 |
| CN110498047B true CN110498047B (en) | 2023-01-06 |
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| CN114104297A (en) * | 2021-11-19 | 2022-03-01 | 中国商用飞机有限责任公司 | Rotational flow mixing device for air source system heat exchanger |
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| GB695781A (en) * | 1946-12-03 | 1953-08-19 | Garrett Corp | Mechanism for conditioning air for enclosures |
| GB1089311A (en) * | 1965-12-02 | 1967-11-01 | United Aircraft Corp | Improvements in and relating to water separators |
| JP2012135737A (en) * | 2010-12-27 | 2012-07-19 | Shimadzu Corp | Static mixing mechanism |
| JP2018202364A (en) * | 2017-06-09 | 2018-12-27 | 三菱航空機株式会社 | Mixture promotion member and air conditioning system having the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6962193B2 (en) * | 2002-04-09 | 2005-11-08 | Honeywell Interntaional Inc. | Tubular catalytic aircraft precooler |
| US9764846B2 (en) * | 2013-04-03 | 2017-09-19 | Hamilton Sundstrand Corporation | Contamination free reverse flow fitting |
| US10322621B2 (en) * | 2017-02-15 | 2019-06-18 | Hamilton Sundstrand Corporation | Inertial particle separator for air cycle machine |
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2019
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB695781A (en) * | 1946-12-03 | 1953-08-19 | Garrett Corp | Mechanism for conditioning air for enclosures |
| GB1089311A (en) * | 1965-12-02 | 1967-11-01 | United Aircraft Corp | Improvements in and relating to water separators |
| JP2012135737A (en) * | 2010-12-27 | 2012-07-19 | Shimadzu Corp | Static mixing mechanism |
| JP2018202364A (en) * | 2017-06-09 | 2018-12-27 | 三菱航空機株式会社 | Mixture promotion member and air conditioning system having the same |
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