A high-pressure gas control device for ejector testing

Abstract

The present invention discloses an ejector test high-pressure gas control device, comprising a sealed housing and two flow regulating cones, wherein a high-pressure gas main flow pipeline is provided inside the sealed housing, an external high-pressure gas supply end is connected to the high-pressure gas main flow pipeline, and the high-pressure gas main flow pipeline is connected to an outer high-pressure gas supply pipeline and an inner high-pressure gas supply pipeline, respectively. Two flow regulating cones are respectively installed at the intersection of the high-pressure gas main flow pipeline, the outer high-pressure gas supply pipeline and the inner high-pressure gas supply pipeline, and the control end of each flow regulating cone is located outside the sealed housing. By adjusting the control end of the flow regulating cone, the throttling area between the regulating end of the regulating cone and the outer high-pressure gas supply pipeline or the inner high-pressure gas supply pipeline can be continuously changed, thereby realizing continuous regulation of the high-pressure gas flow rate. The device has the advantages of precise flow distribution, small size, and high control accuracy, and can be placed inside the intake and exhaust test engine nacelle bracket.

Description

Technical Field

[0001] The invention relates to a wind tunnel test device, in particular to an ejector test high-pressure gas control device. Background Art

[0002] To improve economic efficiency, civil aviation is continuously striving to enhance engine fuel efficiency. The most effective method for improving engine fuel efficiency is to increase the engine's bypass ratio. Increasing the engine's bypass ratio inevitably increases engine size, exacerbating the adverse impact of the nacelle on the aircraft's aerodynamic characteristics. If the engine-aircraft integration is not properly designed, the reduction in fuel consumption per unit time for the individual engine will be offset by the interference of the nacelle, potentially resulting in higher fuel consumption than the original, unmodified, low-bypass ratio engine.

[0003] Ejector nacelle intake and exhaust wind tunnel testing technology is widely used in today's aviation technology. The ejector nacelle is a device that simulates the flow of air into and out of the engine nacelle. When activated, the device controls the flow of high-pressure air supplied to the ejector, simulating the nacelle's internal and external inlet flows and outlet pressure ratios. Using an aircraft model equipped with the ejector nacelle, the effects of the nacelle's intake and exhaust on the overall aircraft's aerodynamic characteristics are studied, providing technical support for engine-aircraft integrated design.

[0004] The intake and exhaust of the engine nacelle alters the flow field on the aircraft's wings, control surfaces, and fuselage, significantly impacting the aircraft's aerodynamic and handling characteristics. With Chinese civil aircraft design units placing increasing emphasis on ejector nacelle intake and exhaust testing, the development of advanced ejector nacelle wind tunnel testing technology is urgent. To meet the requirements of engine nacelle intake and exhaust testing during aircraft development, a high-pressure gas control device for ejector testing is required. Summary of the Invention

[0005] In view of the above shortcomings, the purpose of the present invention is to provide an ejector test high-pressure gas control device, which can accurately and separately control the inner and outer contents of the ejector nacelle in the ejector nacelle intake and exhaust wind tunnel test.

[0006] The technical solution adopted by the present invention is: an ejector test high-pressure gas control device, including a sealed shell, and also including two flow regulating cones, a high-pressure gas main flow pipeline is opened inside the sealed shell, the external high-pressure gas supply end is connected to the high-pressure gas main flow pipeline, the high-pressure gas main flow pipeline is respectively connected to the outer high-pressure gas supply pipeline and the inner high-pressure gas supply pipeline, and two flow regulating cones are respectively installed at the intersection of the high-pressure gas main flow pipeline and the outer high-pressure gas supply pipeline and the inner high-pressure gas supply pipeline, and the control end of each flow regulating cone is located outside the sealed shell. By adjusting the control end of the flow regulating cone, the throttling area between the regulating end of the regulating cone and the outer high-pressure gas supply pipeline or the inner high-pressure gas supply pipeline can be continuously changed, thereby realizing continuous adjustment of the high-pressure airflow rate.

[0007] The present invention also has the following technical features:

[0008] 1. The profile of the adjusting end of the adjusting cone is a gradually changing curved surface.

[0009] 2. The control end of the flow regulating cone is provided with a flow scale.

[0010] 3. High-pressure sealing devices are installed on the outside of the sealed shell and at the connections between the outer high-pressure air supply pipeline, the inner high-pressure air supply pipeline, and the two flow regulating cones.

[0011] Advantages and beneficial effects of the present invention: The present invention converts one high-pressure air intake line into two lines, and can accurately control the gas flow of the two lines respectively. It has the advantages of precise flow distribution and high control accuracy, and can be placed inside the intake and exhaust test engine nacelle bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the structural principle diagram of the device;

[0013] Figure 2 This is the flow regulating cone structure diagram of this device;

[0014] Among them are 1. sealing shell, 2. flow scale, 3. main flow pipeline of high-pressure gas, 4. flow regulating cone of outer duct, 5. flow regulating cone of inner duct, 6. outer duct high-pressure gas supply pipeline, 7. inner duct high-pressure gas supply pipeline, 8. high-pressure sealing ring. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Example 1

[0017] like Figure 1A high-pressure gas control device for ejector testing is shown, comprising a sealed housing and two flow regulating cones. A high-pressure gas main flow line is defined within the sealed housing, with an external high-pressure gas supply end connected to the main flow line. The main flow line is connected to an outer high-pressure gas supply line and an inner high-pressure gas supply line, respectively. Two flow regulating cones are installed at the intersection of the main flow line, the outer high-pressure gas supply line, and the inner high-pressure gas supply line. The control end of each flow regulating cone is located outside the sealed housing. Adjusting the control end of the flow regulating cone continuously changes the throttling area between the regulating end of the regulating cone and the outer high-pressure gas supply line or the inner high-pressure gas supply line, thereby achieving continuous regulation of the high-pressure gas flow rate. The regulating end of the regulating cone has a gradually changing curved surface. A flow scale is provided on the control end of the flow regulating cone. High-pressure sealing rings are installed on the exterior of the sealed housing at the junctions with the outer high-pressure gas supply line, the inner high-pressure gas supply line, and the two flow regulating cones.

[0018] This device can convert one high-pressure air intake line into two, and can precisely control the gas flow of each line. By rotating the control end of the flow control cone with a standard hexagonal wrench, the rotation stroke of the flow control cone is recorded by the flow scale, and the gas flow through the inner and outer high-pressure gas flow channels can be calculated by the scale. In this embodiment, the high-pressure gas flow channel has a maximum cross-sectional area of ​​452.389mm 2 , maximum working pressure 6MPa, high pressure air supply flow control range is 0~3kg / s, control accuracy is ±1g / s.

[0019] The present invention is of great significance to the ejector nacelle intake and exhaust wind tunnel test, and is a key equipment for the ejector nacelle intake and exhaust wind tunnel test. The invented high-pressure gas flow control device has been successfully applied to a semi-model ejector nacelle intake and exhaust wind tunnel test. The device is connected to the high-pressure gas supply pipeline embedded in the wing of the aircraft model. The gas enters the high-pressure gas main flow pipeline, and then passes through the internal flow regulating cone and the external flow regulating cone of the device, enters the external high-pressure gas supply pipeline and the internal high-pressure gas supply pipeline of the nacelle, and finally enters the internal nozzle and the external nozzle of the ejector nacelle to enter the wind tunnel. The flow regulating cone can accurately control the high-pressure gas flow in the circulation pipeline, thereby controlling the internal or external gas flow and pressure ratio of the ejector nacelle.

Claims

1. An ejector test high-pressure gas control device, comprising a sealed housing, characterized in that: It also includes two flow regulating cones. A high-pressure gas main flow pipeline is opened inside the sealed shell. The external high-pressure gas supply end is connected to the high-pressure gas main flow pipeline. The high-pressure gas main flow pipeline is connected to the outer high-pressure gas supply pipeline and the inner high-pressure gas supply pipeline respectively. Two flow regulating cones are installed at the intersection of the high-pressure gas main flow pipeline, the outer high-pressure gas supply pipeline and the inner high-pressure gas supply pipeline. The control end of each flow regulating cone is located outside the sealed shell. By adjusting the control end of the flow regulating cone, the throttling area between the regulating end of the regulating cone and the outer high-pressure gas supply pipeline or the inner high-pressure gas supply pipeline can be continuously changed, thereby realizing continuous adjustment of the high-pressure airflow rate.

2. The ejector test high-pressure gas control device according to claim 1, wherein: The profile of the adjusting end of the adjusting cone is a gradually changing curved surface.

3. A high-pressure gas control device for ejector testing according to claim 1 or 2, characterized in that the control end of the flow regulating cone is provided with a flow scale.

4. The ejector test high-pressure gas control device according to claim 3, wherein: High-pressure sealing devices are installed on the outside of the sealing shell and at the connection points between the outer high-pressure air supply pipeline, the inner high-pressure air supply pipeline and the two flow regulating cones.

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