Wind tunnel test model design method and device based on array jet flow control

Abstract

The embodiment of the invention provides a wind tunnel test model design method and device based on array jet flow control, and the method comprises the steps: determining the model scaling size of a wind tunnel test model, the layout and size parameters of an array jet module, and the medium supply pressure and flow parameters of the array jet module and a gas path; based on the model scaling size, the layout and size parameters of the array jet module, the medium supply pressure and flow parameters of the array jet module and the gas path, and the condition of the wind tunnel test cabin, performing integrated layout and structural design of the wind tunnel test model, the array jet module and the gas path; and according to the integrated layout and the structural design, completing joint processing among the wind tunnel test model, the array jet module and the gas circuit, and completing installation and debugging of the wind tunnel test model, the array jet module and the gas circuit.

Description

Technical Field

[0001] This document relates to the field of wind tunnel model technology, and in particular to a design method and apparatus for a wind tunnel test model based on array jet flow control. Background Technology

[0002] In the development of high-speed air-breathing aircraft, challenges such as insufficient mixing efficiency of engine fuel and incoming oxidizer, unstable combustion, or even failure to burn are encountered, severely restricting the wide-range flight capability of air-breathing engines. To address these challenges, extensive research has been conducted on fuel mixing. Commonly used methods include passive flow control techniques such as concave cavities, ramps, struts, and backward steps to improve fuel mixing efficiency. Additionally, vortex generators can be used to control the vortex structure of the flow field to further enhance fuel mixing efficiency.

[0003] Jet control technology is an important means of vortex generation control, characterized by fast response and strong adjustment capabilities. It is a highly promising flow control scheme for air-breathing engines. The jet can significantly alter the flow field structure, increase the compression performance of the incoming flow, and supplement the intake flow after interfering with the inlet flow. Furthermore, the jet can adjust combustion efficiency, flow rate, and air-fuel mixture ratio after interfering with the combustion chamber flow field. Compared to single-jet control, array jet control allows for multi-point jet control at multiple stations along the intake, thereby promoting rapid mixing between fuel and the high-speed incoming flow and greatly enhancing jet control capabilities. The use of array jet control methods is expected to significantly improve fuel mixing efficiency, providing technical support for the development of air-breathing engines.

[0004] The interference flow field of array jets has many influencing parameters and exhibits significant nonlinear characteristics, resulting in a complex influencing mechanism. When using jets to control the inlet flow field, wind tunnel tests are required to obtain basic data, evaluate the characteristics of the array jet interference flow field, and verify numerical simulation methods. Therefore, it is essential to develop a design method for array jet flow control wind tunnel test models. Existing jet control models are typically single-medium, single-orifice devices, which cannot conduct complex time-series control tests of array jets. This project adopts a multi-jet module and model combination approach to obtain a design method and device for array jet flow control wind tunnel test models, providing technical support for array jet wind tunnel tests. Currently, there is an urgent need for a design scheme for array jet flow control wind tunnel test models. Summary of the Invention

[0005] The purpose of this invention is to provide a wind tunnel test model design method and apparatus based on array jet flow control, aiming to solve the above-mentioned problems in the prior art.

[0006] This invention provides a wind tunnel test model design method based on array jet flow control, comprising: Determine the scaled-down dimensions of the wind tunnel test model, the layout and dimensional parameters of the array jet module, and the supply pressure and flow rate parameters of the array jet module and the air path; Based on the scaled-down model size, the layout and size parameters of the array jet module, the supply pressure and flow parameters of the array jet module and the air path, and the conditions of the wind tunnel test chamber, an integrated layout and structural design of the wind tunnel test model, the array jet module and the air path is carried out. Based on the integrated layout and structural design, the joints between the wind tunnel test model, the array jet module, and the air path were processed, and the installation and commissioning of the wind tunnel test model, the array jet module, and the air path were completed.

[0007] This invention provides a wind tunnel test model device based on array jet flow control, which is configured using the wind tunnel test model design method based on array jet flow control as described in any one of claims 1 to 6. The device specifically includes: A wind tunnel test model is provided with an installation area, and the installation area is provided with an installation area mating surface, on which screw holes of the same size are distributed at equal intervals; Multiple array jet modules are provided on both sides with array jet mating surfaces and screw holes for installation with the installation area. They are installed on the mating surface of the installation area of ​​the wind tunnel test model through the array jet mating surfaces and screw holes.

[0008] By employing the embodiments of this invention, and using a combination of test models and array jet modules, along with a unified mating surface and screw hole size for the test model and array jet modules, array jet wind tunnel tests can be conducted, improving the ability to conduct wind tunnel tests with different jet layouts using the same test model. Furthermore, by using a method where the length of the small-sized array jet modules is consistent with that of the large-sized array jet modules after assembly, the ability to conduct array jet tests with various jet layouts and pressure combinations can be achieved at the same jet module installation location. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a flowchart of a wind tunnel test model design method based on array jet flow control according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the wind tunnel test model device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the mating surface and threaded hole of the mounting area in an embodiment of the present invention; Figure 4 This is a schematic diagram of the array jet mating surface according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the first array jet module according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the second array jet module according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the third array jet module according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the fourth array jet module according to an embodiment of the present invention. Detailed Implementation

[0011] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0012] Method Implementation Examples According to embodiments of the present invention, a method for designing a wind tunnel test model based on array jet flow control is provided. Figure 1 This is a flowchart of a wind tunnel test model design method based on array jet flow control according to an embodiment of the present invention, as shown below. Figure 1 As shown, the wind tunnel test model design method based on array jet flow control according to an embodiment of the present invention specifically includes: Step S101: Determine the scaled-down dimensions of the wind tunnel test model, the layout and dimensional parameters of the array jet module, and the supply pressure and flow rate parameters of the array jet module and the air path; wherein, determining the scaled-down dimensions of the wind tunnel test model specifically includes: The model scale of the wind tunnel test model is determined based on the wind tunnel nozzle exit flow field conditions, the wind tunnel test model, the wind tunnel struts used to support the wind tunnel test model, and the maximum blockage degree of the jet flow rate. The maximum blockage degree is no greater than 5%. Specifically, determining the supply pressure and flow rate parameters for the array jet module and the gas path includes: Based on the jet parameter requirements of wind tunnel tests, the jet pressure of different nozzles is obtained, and combined with the jet nozzle conditions of different array jet modules, the supply medium pressure and flow parameters of the array jet module and the gas path are calculated.

[0013] Determining the layout and dimensional parameters of the array jet module specifically includes: Different array jet modules are designed with the same width but different lengths, and the screw holes on the different array jet modules for installation with the wind tunnel test model are designed with the same layout, the same spacing, and the same screw hole size. Among the array jet modules of different lengths, the total length of the smaller-sized array jet modules combined is the same as the length of the larger-sized array jet modules, so as to realize the installation of different array jet modules and different combinations of array jet modules. The air path interface of the array jet module is designed to facilitate the installation of air paths of adjacent modules in different directions, wherein the different directions specifically include: horizontal and vertical. The array jet branch outlet of the array jet module is designed to be connected to the wind tunnel test model by a flexible hose, and the deformation of the hose under ventilation conditions is less than the preset value.

[0014] Step S102: Based on the scaled-down model size, the layout and dimensional parameters of the array jet module, the supply pressure and flow parameters of the array jet module and the gas path, and the conditions of the wind tunnel test chamber, an integrated layout and structural design of the wind tunnel test model, the array jet module, and the gas path is performed. The conditions of the wind tunnel test chamber specifically include: the condition of the wind tunnel test chamber support rods and the gas path interfaces. The integrated layout and structural design of the wind tunnel test model, the array jet module, and the gas path specifically includes: like Figure 3 As shown, the installation area on the wind tunnel test model is provided with an installation area mating surface that satisfies the installation of multiple array jet modules, wherein the installation area mating surface is uniformly arranged with threaded holes of the same size as the array jet modules. The surface of the installation area of ​​the wind tunnel test model after installation is flush with the surface of the array jet module, and maintains airtightness at all locations except for the jet nozzles under test pressure.

[0015] Step S103: Based on the integrated layout and structural design, complete the joint processing between the wind tunnel test model, the array jet module and the air path, and complete the installation and debugging of the wind tunnel test model, the array jet module and the air path.

[0016] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0017] The wind tunnel test model design method based on array jet flow control according to an embodiment of the present invention specifically includes the following processes: Step 1: Based on the flow field conditions at the wind tunnel nozzle exit, determine the scaled-down size of the model by combining the wind tunnel test model and the maximum flow rate blockage of the array jet used in the test, and ensure that the wind tunnel test model, wind tunnel support rods, and maximum flow rate blockage of the jet do not exceed 5%; Step 2: Based on the jet parameter requirements of the wind tunnel test, obtain the jet pressure of different nozzles, and calculate the supply pressure, flow rate and other parameters of the array jet module and gas path by combining the jet nozzle conditions of different array jet modules. Step 3: Based on the scaled-down dimensions of the test model and the conditions of the wind tunnel test chamber support rods, air path interfaces, etc., complete the wind tunnel test model, array jet module, integrated air path layout and structural design; Step 4: Based on the design requirements, complete the processing, installation, and debugging of the wind tunnel test model, array jet module, and air path connectors; The different array jet modules are designed with the same width, and the screw hole layout, spacing, and screw hole size are identical for installation with the test model. For array jet modules of different lengths, the combined length of the smaller-sized modules can match the length of the larger-sized modules, allowing for the installation of different jet modules and combinations of array jet modules under the same length and width constraints. The air passage interfaces of the array jet modules are designed in different directions, such as horizontal and vertical, to facilitate the installation of air passages for adjacent modules. Flexible hoses are used to connect the array jet branch air passage outlets to the model, and the deformation of the hoses under ventilation conditions should be minimized. The wind tunnel test model device is as follows: Figure 2 As shown, after installation, the surface of the wind tunnel test model is flush with the surface of the array jet module, with no protrusions, and under test pressure, except for the jet nozzles, the other positions have good airtightness and no leakage.

[0018] In summary, by adopting a combination of wind tunnel test models and array jet modules, and by using a unified mating surface and screw hole size for the wind tunnel test models and array jet modules, the ability to conduct array jet wind tunnel tests has been realized, especially the ability to conduct wind tunnel tests with different jet layouts using the same test model.

[0019] Device Examples According to embodiments of the present invention, a wind tunnel test model device based on array jet flow control is provided. Figure 2 This is a schematic diagram of a wind tunnel test model device based on array jet flow control according to an embodiment of the present invention, as shown below. Figure 2 As shown, the wind tunnel test model device based on array jet flow control according to an embodiment of the present invention specifically includes: Wind tunnel test models, such as Figure 3 As shown, an installation area is provided (preferably, in the Zhiji application, the safety area is a plate 1), and an installation area mating surface is provided on the installation area, with screw holes of the same size distributed at equal intervals on the installation area mating surface; Multiple array jet modules, such as Figure 4 As shown, array jet mating surfaces and screw holes are provided on both sides for mounting to the installation area. The model is mounted to the installation area mating surface of the wind tunnel test model via these mating surfaces and screw holes. Figure 5-8 As shown, the plurality of array jet modules specifically include: The first jet module 2 has a single oblique jet hole on its surface, a vertically downward pipe joint at its bottom, and array jet mating surfaces and screw holes on both sides for mating with the mating surface of the installation area. The second jet module 3 has a single oblique jet hole on its surface, a horizontal pipe joint at the bottom, and array jet mating surfaces and screw holes on both sides for mating with the mating surfaces of the installation area. The third jet module 4 has a single oblique jet hole on its surface, a vertically downward pipe joint at its bottom, and array jet mating surfaces and screw holes on both sides for mating with the mating surfaces of the installation area. The fourth jet module 5 has two oblique jet holes on its surface, a vertically downward pipe connector at its bottom, and array jet mating surfaces and screw holes on both sides for mating with the mating surfaces of the installation area. The total length of the first, second, and third jet modules, when combined and installed, is the same as the length of the fourth jet module. The surfaces of the combined array of jet modules are flush with the surface of the installation area of ​​the wind tunnel test model.

[0020] In summary, by using a combination of small-sized array jet modules with the same length as large-sized array jet modules, the ability to conduct array jet tests with various jet layouts and pressure combinations can be achieved at the same jet module installation location.

[0021] The embodiments of the present invention are device embodiments corresponding to the above method embodiments. The specific operation of each module can be understood with reference to the description of the method embodiments, and will not be repeated here.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind tunnel test model design method based on arrayed fluidics flow control, characterized by, include: Determine the scaled-down dimensions of the wind tunnel test model, the layout and dimensional parameters of the array jet module, and the supply pressure and flow rate parameters of the array jet module and the air path; Based on the scaled-down model size, the layout and size parameters of the array jet module, the supply pressure and flow parameters of the array jet module and the air path, and the conditions of the wind tunnel test chamber, an integrated layout and structural design of the wind tunnel test model, the array jet module and the air path is carried out. Based on the integrated layout and structural design, the joints between the wind tunnel test model, the array jet module, and the air path were processed, and the installation and commissioning of the wind tunnel test model, the array jet module, and the air path were completed.

2. The method of claim 1, wherein, Determining the scale-down dimensions of the wind tunnel test model specifically includes: The model scale size of the wind tunnel test model is determined based on the wind tunnel nozzle outlet flow field conditions, the wind tunnel test model, the wind tunnel struts used to support the wind tunnel test model, and the maximum blockage of the jet flow rate, wherein the maximum blockage is not greater than 5%.

3. The method of claim 1, wherein, Determining the supply pressure and flow rate parameters of the array jet module and gas path specifically includes: Based on the jet parameter requirements of wind tunnel tests, the jet pressure of different nozzles is obtained, and combined with the jet nozzle conditions of different array jet modules, the supply medium pressure and flow parameters of the array jet module and the gas path are calculated.

4. The method of claim 1, wherein, The details of the wind tunnel test chamber include: the condition of the wind tunnel test chamber support rods and air passage interfaces.

5. The method of claim 1, wherein, Determining the layout and dimensional parameters of the array jet module specifically includes: Different array jet modules are designed with the same width but different lengths, and the screw holes on the different array jet modules for installation with the wind tunnel test model are designed with the same layout, the same spacing, and the same screw hole size. Among the array jet modules of different lengths, the total length of the smaller-sized array jet modules combined is the same as the length of the larger-sized array jet modules, so as to realize the installation of different array jet modules and different combinations of array jet modules. The air path interface of the array jet module is designed to facilitate the installation of air paths of adjacent modules in different directions, wherein the different directions specifically include: horizontal and vertical. The array jet branch outlet of the array jet module is designed to be connected to the wind tunnel test model by a flexible hose, and the deformation of the hose under ventilation conditions is less than the preset value.

6. The method of claim 1, wherein, The integrated layout and structural design of the wind tunnel test model, array jet module, and air path specifically includes: The installation area on the wind tunnel test model is provided with an installation area mating surface that satisfies the installation of multiple array jet modules, wherein the installation area mating surface is uniformly arranged with threaded holes of the same size as the array jet modules. The surface of the installation area of ​​the wind tunnel test model after installation is flush with the surface of the array jet module, and maintains airtightness at all locations except for the jet nozzles under test pressure.

7. A wind tunnel test model device based on arrayed fluidic flow control, characterized by, The device is configured using the wind tunnel test model design method based on array jet flow control as described in any one of claims 1 to 6, and specifically includes: A wind tunnel test model is provided with an installation area, and the installation area is provided with an installation area mating surface, on which screw holes of the same size are distributed at equal intervals; Multiple array jet modules are provided on both sides with array jet mating surfaces and screw holes for installation with the installation area. They are installed on the mating surface of the installation area of ​​the wind tunnel test model through the array jet mating surfaces and screw holes.

8. The wind tunnel model device based on arrayed fluidic flow control of claim 7, wherein, The plurality of array jet modules specifically include: The first jet module has a single angled jet hole on its surface, a vertically downward pipe connector at the bottom, and array jet mating surfaces and screw holes on both sides for mating with the mating surface of the installation area. The second jet module has a single angled jet hole on its surface, a horizontal pipe joint at the bottom, and array jet mating surfaces and screw holes on both sides for mating with the mating surfaces of the installation area. The third jet module has a single angled jet hole on its surface, a vertically downward pipe connector at the bottom, and array jet mating surfaces and screw holes on both sides for mating with the mating surfaces of the installation area. The fourth jet module has two oblique jet holes on its surface, a vertically downward pipe connector at the bottom, and array jet mating surfaces and screw holes on both sides for mating with the mating surfaces of the installation area.

9. The wind tunnel test model device based on array jet flow control according to claim 8, characterized in that, The total length of the first jet module, the second jet module, and the third jet module after assembly is the same as the length of the fourth jet module.

10. The wind tunnel test model device based on array jet flow control according to claim 7, characterized in that, The surfaces of the combined array jet modules are flush with the surface of the installation area of ​​the wind tunnel test model.

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