CN111238762A - Nozzle ground test platform for icing wind tunnel - Google Patents
Nozzle ground test platform for icing wind tunnel Download PDFInfo
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- CN111238762A CN111238762A CN202010146375.4A CN202010146375A CN111238762A CN 111238762 A CN111238762 A CN 111238762A CN 202010146375 A CN202010146375 A CN 202010146375A CN 111238762 A CN111238762 A CN 111238762A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention is suitable for the technical field of icing wind tunnels, and provides a nozzle ground test platform for an icing wind tunnel, which comprises a water supply system, an air supply system and a nozzle assembly, wherein the air supply system comprises a first air supply system and a second air supply system, the first air supply system is connected with the nozzle assembly, and the first air supply system provides air flow for the nozzle assembly; the water supply system comprises a pressure regulating water tank, the second path of air supply system is connected with the pressure regulating water tank, and the water supply system provides water flow to the nozzle assembly. Therefore, the purpose of fine adjustment of the water pressure can be achieved by adjusting the air pressure of the second air supply system.
Description
Technical Field
The invention belongs to the technical field of icing wind tunnels, and particularly relates to a nozzle ground test platform for an icing wind tunnel.
Background
The icing wind tunnel of 3 m × 2 m is one of the main devices for developing icing tests in the wind tunnel, and comprises 1000 independent atomizing nozzles for generating icing mist required by the tests. The nozzle ground test platform for the icing wind tunnel is mainly used for calibrating a single nozzle in a spraying system, and aims to calibrate parameters such as the average water droplet diameter, the spraying cone angle, the consistency and the like of the nozzle one by one before initial installation so as to guarantee the cloud and mist uniformity of a wind tunnel test section; and secondly, in the use of the wind tunnel, the nozzle is periodically detected, and a damaged nozzle corroded due to long-term use is replaced, so that the good quality of a wind tunnel cloud and fog field is ensured.
The nozzle ground test platform for the icing wind tunnel is based on the icing wind tunnel of 3 m multiplied by 2 m, and the working conditions of water spraying and air pressure are required to be completely simulated.
The working state of the spraying system is divided into a test standby stage and a test measuring stage. Wherein, the test standby stage mainly makes the water supply system and the air supply system reach the pressure values required by the test; the test measurement stage is to perform particle size measurement analysis on the cloud mist generated by the nozzle during the test. The test measurement stage is short in time, and the spraying system is mainly in a test standby stage, so that the water supply system and the air supply system are required to be in a constant pressure state.
Disclosure of Invention
The invention aims to provide a nozzle ground test platform for an icing wind tunnel, and aims to solve the technical problem that the pressure of a water supply system and a gas supply system is difficult to accurately control in the prior art.
The invention is realized in such a way that a nozzle ground test platform for an icing wind tunnel comprises a water supply system, an air supply system and a nozzle assembly, wherein the air supply system comprises a first air supply system and a second air supply system, the first air supply system is connected with the nozzle assembly, and the first air supply system provides air flow for the nozzle assembly; the water supply system comprises a pressure regulating water tank, the second path of air supply system is connected with the pressure regulating water tank, and the water supply system provides water flow to the nozzle assembly. Therefore, the purpose of fine adjustment of the water pressure can be achieved by adjusting the air pressure of the second air supply system.
Still include the main structure body, the top of main structure body includes X to track and Y to the track, and Z is to the lift track install X is to on the track, nozzle assembly installs Z is to the orbital end that goes up and down. Therefore, the movement of the nozzle assembly in three XYZ directions can be achieved.
The nozzle assembly comprises a nozzle and a nozzle frame, the nozzle frame comprises an upper connecting body and a lower connecting body, the upper connecting body is used for being connected with the tail end of the Z-direction lifting track, and the lower connecting body is used for being connected with the nozzle. Through the setting of this nozzle bracket, provide the general interface that is suitable for multiple different grade type nozzle, conveniently change the nozzle of different grade type and test.
First air supply system of all the way includes that many first branches, the energy storage jar of 1 st are aerifyd, many first branches include 1 st solenoid valve and spray tube, through many first branches are to the energy storage jar of 1 st is aerifyd.
In each first branch, the diameters of the throats in the spray pipes are unequal, so that the air supply speed can be conveniently limited, the 1 st electromagnetic valve corresponding to the large-size throat can be opened when the air pressure is too low, so that the air supply is accelerated, and the 1 st electromagnetic valve corresponding to the small-size throat is only opened for supplying air when the air pressure difference is not large, so that the state of stable air supply flow balance is achieved.
The second gas supply system comprises a plurality of second branches and a 2 nd energy storage tank for gas charging, the second branches comprise a 2 nd electromagnetic valve and a spray pipe, and the 2 nd energy storage tank is charged with gas through the second branches.
In each second branch, the diameters of the throats in the spray pipes are unequal, so that the air supply speed can be conveniently limited, the 4 th electromagnetic valve corresponding to the large-size throat can be opened when the air pressure is too low, so that the air supply is accelerated, and only the 4 th electromagnetic valve corresponding to the small-size throat is opened for supplying air when the air pressure difference is not large, so that the state of stable air supply flow balance is achieved.
Have slider, air inlet, residual air discharge port, fill mouth of a river, delivery port in the pressure regulating jar, the air inlet the residual air discharge port is located one side of slider, fill the mouth of a river the delivery port is located the opposite side of slider, be provided with the film on the slider, through the slider separates compressed air in with the pressure regulating jar with water to can reach fine setting hydraulic purpose through adjusting atmospheric pressure.
And the air inlet is connected with the air outlet of the 2 nd energy storage tank.
The water capacity of the pressure regulating water tank is set to be large capacity, so that pressure fluctuation at the moment of opening the electromagnetic valve can be compensated.
Compared with the prior art, the invention has the technical effects that:
1. the aim of fine adjustment of the water pressure can be achieved by adjusting the air pressure, and the stable adjustment of the water pressure is realized;
2. the nozzle assembly can move in the three directions of XYZ, so that the test is convenient;
3. the arrangement of the nozzle frame provides a universal interface suitable for various nozzles of different types, and the nozzles of different types can be conveniently replaced for testing;
4. in each first branch and each second branch, the diameters of throats in the spray pipes are unequal, so that the air supply speed can be conveniently limited, when the air pressure is too low, the electromagnetic valve corresponding to the large-size throat can be opened to accelerate air supply, and when the air pressure difference is not large, the electromagnetic valve corresponding to the small-size throat is only opened to supply air, so that a state of stable air supply flow balance is achieved, and stable adjustment of the air pressure and the water pressure 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 of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a nozzle ground test platform for an icing wind tunnel according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a structural body;
FIG. 3 is a schematic structural view of a nozzle assembly;
FIG. 4 is a system workflow diagram;
fig. 5 is a schematic structural view of the pressure-regulating water tank.
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 drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that when an element is referred to as being "fixed" or "disposed" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting 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.
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 order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the structural schematic diagram of the nozzle ground test platform for the icing wind tunnel is shown, and the nozzle ground test platform for the icing wind tunnel comprises a structural main body 1, a water supply system 2, an air supply system 3, an air pumping and exhausting system, a nozzle assembly 5, a pressure control monitoring system and a cloud and mist test device 4;
during the test, the water supply system 2 provides water flow to the nozzle assembly 5, the air supply system 3 provides air flow to the nozzle assembly 5, and the water supply system 2 and the air supply system 3 are provided with corresponding pressure measurement control systems;
the pressure control monitoring system is used for adjusting and controlling the water pressure of the water supply system 2 and the air pressure of the air supply system 3, a PLC (programmable logic controller) is used for carrying out centralized control, and an industrial personal computer is used for carrying out real-time monitoring and control on water pressure data and air pressure data;
the air extraction and exhaust system is used for preventing air backflow in the nozzle ground test platform for the icing wind tunnel from influencing a cloud and mist measurement area, so that the exhaust flow of the air extraction and exhaust system is required to be larger than the air injection quantity of the nozzle assembly 5;
the cloud testing device 4 includes a PDI measuring instrument and a malvern measuring instrument, and is configured to measure parameters such as the particle size of the generated cloud droplets. The cloud and mist testing equipment 4 needs a supporting device, so that the cloud and mist testing equipment 4 can be conveniently installed and measured.
As shown in fig. 2, which is a schematic structural diagram of a structural body, the structural body 1 is the core of a spray table, and is a test development and measurement area, and all the matching systems are unfolded around the structural body 1.
The structure main body 1 adopts a frame structure, an aluminum profile is used as a framework, the wall surface is composed of optical glass with excellent light transmission performance, and the optical glass enters the room through a glass door;
the top of the structure body 1 comprises an X-direction rail 6 and a Y-direction rail 7, a Z-direction lifting rail 8 is arranged on the X-direction rail 6, the nozzle assembly 5 is arranged at the tail end of the Z-direction lifting rail 8, and the X-direction rail 6, the Y-direction rail 7 and the Z-direction lifting rail 8 can realize the movement of the nozzle assembly 5 in three directions of XYZ;
as shown in fig. 3, which is a schematic structural view of the nozzle assembly 5, the nozzle assembly 5 includes a nozzle (not shown) and a nozzle holder 5-1, and the nozzle holder 5-1 includes an upper connecting body 9 and a lower connecting body 10, wherein the upper connecting body 9 is used for connecting with the end of the Z-direction lifting rail 8, and the lower connecting body 10 is used for connecting with the nozzle; an air supply pipe 11 and a water supply pipe 12 are arranged in the Z-direction lifting track 8, the air supply pipe 11 and the water supply pipe 12 are connected with the upper connector 9, internal channels are arranged in the upper connector 9 and the lower connector 10, and water flow and air flow in the air supply pipe 11 and the water supply pipe 12 can be guided to the nozzles. Through the setting of this nozzle bracket, provide the general interface that is suitable for multiple different grade type nozzle, conveniently change the nozzle of different grade type and test.
Fig. 4 shows a system work flow chart.
For an air supply system, air is divided into a first path of air supply system 3-1 and a second path of air supply system 3-2 after passing through an air compressor, a stop valve and a filter, in the first path of air supply system 3-1, a 1 st energy storage tank is inflated in a 1 st electromagnetic valve and spray pipe mode, specifically, the 1 st energy storage tank is inflated in a 1 st electromagnetic valve and spray pipe mode of a plurality of first branches, the 1 st electromagnetic valve and spray pipe shown in fig. 4 comprises three first branches, wherein throat diameters in the spray pipes in each first branch are unequal; the diameters of the throats in the spray pipes in each first branch are set to be unequal, the diameters are mainly used for limiting air supply speed, the 1 st electromagnetic valve corresponding to the large-size throat can be opened when air pressure is too low, air supply is accelerated, and only the 1 st electromagnetic valve corresponding to the small-size throat is opened for air supply when air pressure is not large in difference, so that a state that air supply flow is balanced and stable is achieved.
The 1 st energy storage tank is provided with a pressure sensor for detecting the gas pressure in the 1 st energy storage tank, preferably, the pressure sensor is a pressure gauge; the 1 st energy storage tank is also provided with a 2 nd electromagnetic valve, and the 1 st energy storage tank is communicated with the atmosphere through the 2 nd electromagnetic valve.
When detecting that the gas pressure in the 1 st energy storage tank is too low, opening the 1 st electromagnetic valve to enable compressed air to be charged into the 1 st energy storage tank, and when the gas pressure in the 1 st energy storage tank is too high, closing the 1 st electromagnetic valve and opening the 2 nd electromagnetic valve to discharge the pressure.
When the gas pressure in the 1 st accumulator tank reaches the set value, a spray starting command is waited. Air passes through the air outlet of the 1 st energy storage tank, passes through the air flow meter and the 3 rd electromagnetic valve and then reaches the nozzle.
In the second gas supply system 3-2, the 2 nd energy storage tank is charged in a 4 th electromagnetic valve and nozzle adding mode, specifically, the 2 nd energy storage tank is charged in a 4 th electromagnetic valve and nozzle adding mode of a plurality of second branches, the 4 th electromagnetic valve and nozzle adding mode shown in fig. 4 comprises three second branches, wherein the diameters of throats in the nozzles in each second branch are unequal; the diameters of the throats in the spray pipes in each second branch are set to be unequal, the air supply speed is limited, the 4 th electromagnetic valve corresponding to the large-size throat can be opened when the air pressure is too low, so that air supply is accelerated, and only the 4 th electromagnetic valve corresponding to the small-size throat is opened for air supply when the air pressure difference is not large, so that a stable state of air supply flow balance is achieved.
The 2 nd energy storage tank is also provided with a pressure sensor for detecting the gas pressure in the 2 nd energy storage tank, preferably, the pressure sensor is a pressure gauge; the 2 nd energy storage tank is also provided with a 5 th electromagnetic valve, and the 2 nd energy storage tank is communicated with the atmosphere through the 5 th electromagnetic valve.
When the gas pressure in the 2 nd energy storage tank is detected to be too low, the 5 th electromagnetic valve is opened to enable the compressed air to be charged into the 2 nd energy storage tank, and when the gas pressure in the 2 nd energy storage tank is detected to be too high, the 4 th electromagnetic valve is closed, and the 5 th electromagnetic valve is opened to release the pressure.
The gas outlet of the No. 2 energy storage tank is connected with the gas inlet of the pressure regulating water cylinder, so that the aim of fine adjustment of water pressure can be achieved by regulating the gas pressure of the second gas supply system.
For a water supply system, firstly, tap water is fed into a water softener to be softened, the softened water is stored in a pure water tank, a water outlet of the pure water tank is sequentially connected with a stop valve, a water pump, a one-way valve, a filter, a 6 th electromagnetic valve and a pressure regulating water tank, and water is pumped to the pressure regulating water tank through the water pump to fill the pressure regulating water tank with water.
As shown in fig. 5, which is a schematic structural diagram of a pressure regulating water cylinder, an air inlet 13 is arranged on the pressure regulating water cylinder, and the air inlet 13 is connected with an air outlet of a 2 nd energy storage tank; the pressure regulating water vat is also provided with a residual gas discharge port 14, and when water is filled into the pressure regulating water vat, gas above the water surface can return to the pure water tank through the residual gas discharge port 14; the pressure regulating water vat is also provided with a water outlet 16, and the water outlet 16 is connected with the nozzle through a water flowmeter and an 8 th electromagnetic valve; the pressure regulating water cylinder is also provided with a water filling port 15, and water pumped by the water pump fills the pressure regulating water cylinder with water through the water filling port 15.
The pressure regulating water cylinder is also provided with a slide block 18, the slide block 18 is provided with a film 7, the air inlet 13 and the residual air discharge port 14 are positioned on one side of the slide block 18, and the water filling port 15 and the water outlet 16 are positioned on the other side of the slide block 18, so that the slide block 18 separates compressed air from water, and the aim of fine adjustment of water pressure can be achieved by regulating air pressure.
Meanwhile, the water capacity of the pressure regulating water cylinder is set to be large, so that the pressure fluctuation at the opening moment of the 8 th electromagnetic valve can be compensated.
When the water quantity of the pressure regulating water tank is less than the set value, the 6 th electromagnetic valve is opened, the water pump replenishes water for the pressure regulating water tank, and when the water quantity reaches the set upper limit value, the water pump and the 6 th electromagnetic valve are closed, and water replenishing is stopped. The working water pressure of the water supply system is controlled by a second air supply system 3-2 of the air supply system, the second air supply system 3-2 enters a pressure regulating water cylinder after pressure and flow regulation, and compressed air and water are separated by a slide block with a film, so that the aim of fine adjustment of the water pressure can be achieved by regulating the air pressure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A nozzle ground test platform for an icing wind tunnel is characterized by comprising a water supply system, an air supply system and a nozzle assembly, wherein the air supply system comprises a first air supply system and a second air supply system, the first air supply system is connected with the nozzle assembly, and the first air supply system provides air flow for the nozzle assembly; the water supply system comprises a pressure regulating water tank, the second path of air supply system is connected with the pressure regulating water tank, and the water supply system provides water flow to the nozzle assembly.
2. The nozzle ground test platform for the icing wind tunnel according to claim 1, further comprising a structural body, wherein the top of the structural body comprises an X-direction rail and a Y-direction rail, a Z-direction lifting rail is installed on the X-direction rail, and the nozzle assembly is installed at the tail end of the Z-direction lifting rail.
3. The nozzle ground test platform for the icing wind tunnel according to claim 2, wherein the nozzle assembly comprises a nozzle and a nozzle holder, the nozzle holder comprises an upper connecting body and a lower connecting body, the upper connecting body is used for being connected with the tail end of the Z-direction lifting track, and the lower connecting body is used for being connected with the nozzle.
4. The nozzle ground test platform for the icing wind tunnel according to claim 1, wherein the first path gas supply system comprises a plurality of first branches and a 1 st energy storage tank for gas charging, the plurality of first branches comprise a 1 st electromagnetic valve and a spray pipe, and the 1 st energy storage tank is charged through the plurality of first branches.
5. The nozzle ground test platform for the icing wind tunnel according to claim 4, wherein the diameters of the throats in the nozzles in each first branch are not equal.
6. The nozzle ground test platform for the icing wind tunnel according to claim 1, wherein the second air supply system comprises a plurality of second branches and a 2 nd energy storage tank for inflation, the plurality of second branches comprise a 2 nd electromagnetic valve and a spray pipe, and the 2 nd energy storage tank is inflated through the plurality of second branches.
7. The nozzle ground test platform for the icing wind tunnel according to claim 6, wherein the diameters of the throats in the nozzles in each second branch are not equal.
8. The nozzle ground test platform for the icing wind tunnel according to claim 6, wherein the pressure regulating water cylinder is internally provided with a slide block, an air inlet, a residual air discharge port, a water filling port and a water outlet, the air inlet and the residual air discharge port are positioned on one side of the slide block, the water filling port and the water outlet are positioned on the other side of the slide block, the slide block is provided with a film, and compressed air and water in the pressure regulating water cylinder are separated through the slide block.
9. The nozzle ground test platform for the icing wind tunnel according to claim 8, wherein the air inlet is connected with an air outlet of the 2 nd energy storage tank.
10. The nozzle ground test platform for the icing wind tunnel according to claim 1, wherein the water capacity of the pressure regulating water cylinder is set to be large.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010146375.4A CN111238762A (en) | 2020-03-05 | 2020-03-05 | Nozzle ground test platform for icing wind tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010146375.4A CN111238762A (en) | 2020-03-05 | 2020-03-05 | Nozzle ground test platform for icing wind tunnel |
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| CN111238762A true CN111238762A (en) | 2020-06-05 |
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| CN202010146375.4A Pending CN111238762A (en) | 2020-03-05 | 2020-03-05 | Nozzle ground test platform for icing wind tunnel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112798213A (en) * | 2021-04-08 | 2021-05-14 | 中国空气动力研究与发展中心低速空气动力研究所 | Hot air supply rapid adjusting system and air supply method for icing wind tunnel |
| CN113447407A (en) * | 2021-08-17 | 2021-09-28 | 中国空气动力研究与发展中心低速空气动力研究所 | Particle size measuring method |
| CN114354152A (en) * | 2021-12-08 | 2022-04-15 | 北京航空航天大学 | Nozzle performance test equipment |
| CN117483131A (en) * | 2023-11-03 | 2024-02-02 | 哈尔滨理工大学 | Spraying system and method in controllable low-temperature environment |
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| CN117483131A (en) * | 2023-11-03 | 2024-02-02 | 哈尔滨理工大学 | Spraying system and method in controllable low-temperature environment |
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Application publication date: 20200605 |