A dual-system ventilation and cooling air intake duct with airbag flow control

Abstract

The present application belongs to the field of aircraft design, and particularly relates to an airbag flow control dual-system ventilation and cooling air inlet. The air inlet is a common inlet for two ventilation and cooling systems arranged in parallel, and the common inlet is a NACA air inlet, which is located on a fuselage bulge with a certain windward surface; the NACA air inlet is connected to two ventilation and cooling pipelines, and the two pipelines are separated by a diverter. On the walls of both sides of the pipeline, there are inflation nozzles, and air is supplied to the airbag through the inflation nozzles. The present application changes the surface shape of the airbag by adjusting the inflation amount of the inflatable airbag, thereby changing the throat area of ​​the two pipelines, and realizing the airflow flow distribution of the two pipelines.

Description

Technical Field

[0001] The present application belongs to the field of aircraft design, and in particular relates to an airbag flow control dual-system ventilation and cooling air inlet. Background Art

[0002] The embedded air inlet has no components protruding from the surface of the aircraft, which can keep the aircraft's aerodynamic surface as "clean" as possible and will not damage the aircraft's aerodynamic performance. Therefore, it is the main form of air inlet for the ventilation and cooling system on the aircraft. There are many cooling systems on the aircraft that require the opening of such ventilation and cooling ports. In some cases, two systems can share the same air inlet, that is, the dual systems are connected in parallel. After the cooling air enters from the same inlet, it is divided into two pipelines and provides cooling air to the two systems respectively. This dual-system ventilation and cooling air inlet can effectively reduce the number of openings in the fuselage, save layout space, save weight, and bring certain drag reduction benefits.

[0003] However, the dual-system flow distribution problem is a difficulty when the systems are used in parallel. How to comprehensively consider the usage scenarios, flow requirements, and flow resistance characteristics of the two systems to meet the flow requirements under different usage conditions while paying the minimum resistance cost is the design goal of this type of air intake. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides an airbag flow control dual-system ventilation and cooling air inlet duct, including a body surface, and a bulge located on the body surface, wherein a NACA air inlet is arranged on the bulge, and the rear end of the NACA air inlet is connected to a first air intake pipe and a second air intake pipe of different sizes in parallel, the side wall of the first air intake pipe has a first air intake airbag, and the side wall of the second air intake pipe has a second air intake airbag.

[0005] Preferably, the NACA air inlet has a windward surface, which is inclined relative to the surface of the bulge and protrudes from the bulge surface to form a common air inlet, and the first air inlet pipe and the second air inlet pipe are arranged at the end of the common air inlet, with the front end located at the highest point of the protruding bulge surface of the windward surface and the rear end extending into the body.

[0006] Preferably, the first air intake pipeline and the second air intake pipeline are separated by a diverter, the windward surface of the front edge of the diverter is an arc-shaped structure, and the first air intake airbag and the second air intake airbag are respectively arranged on the two side walls of the rear part of the diverter.

[0007] Preferably, the two side walls at the rear end of the diverter are respectively provided with a first inflation nozzle and a second inflation nozzle, the first inflation nozzle is used to supply air to the first air inlet airbag, and the second inflation nozzle is used to supply air to the second air inlet airbag.

[0008] Preferably, the first inflation nozzle and the second inflation nozzle protrude from the wall surface by 1-3 mm.

[0009] Preferably, the first inflation nozzle and the second inflation nozzle have a nozzle opening adjustment switch, which is used to change the surface shape of the airbag by adjusting the inflation amount of the first air intake airbag and the second air intake airbag, thereby changing the throat area of ​​the two pipes and realizing the airflow flow distribution of the two pipes.

[0010] Preferably, the first inflation nozzle and the second inflation nozzle also have a deflation function for adjusting the amount of air in the airbag.

[0011] Preferably, the first inflation nozzle and the second inflation nozzle supply and deflate air separately, and the airbags on both sides are independently designed and isolated from each other.

[0012] Preferably, it further comprises an air intake control system, wherein the air intake control system is configured to adjust the working state of the airbag to change between three states: single-side inflation, double-side inflation and double-side non-inflation.

[0013] Preferably, the double-sided inflation state corresponds to a small flow state of the dual systems, in order to reduce resistance and reduce resistance entering the dual systems, while also ensuring the normal operation of the dual-sided systems.

[0014] The present application opens a NACA air inlet on the bulge on the surface of the fuselage to provide cooling air for two systems at the same time. This air intake method effectively reduces the number of fuselage openings, effectively utilizes the limited windward area on the fuselage, saves layout space, and saves weight; the throat area on both sides is changed by airbags, which is simple and feasible with a wide adjustment range; the airbags on both sides are inflated by nozzles, and the inflation volume on both sides is controlled according to different states, and the structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preferred embodiment of the airbag flow control dual-system ventilation and cooling inlet duct of the present application.

[0016] Figure 2 This application Figure 1 Schematic diagram of the NACA air inlet structure of the illustrated embodiment.

[0017] Figure 3 This application Figure 1 A schematic diagram of the inflatable airbag of the illustrated embodiment is shown in FIG.

[0018] Figure 4 This application Figure 3 The inflated airbag of the illustrated embodiment is shown in a top view when unfolded.

[0019] Figure 5 This application Figure 3 A partially enlarged schematic diagram of the inflatable airbag of the illustrated embodiment is shown in FIG.

[0020] Among them, 1-body surface, 2-bulge, 3-NACA air inlet, 4-first air inlet pipeline, 5-second air inlet pipeline, 6-diverter, 7-first air inlet airbag, 8-second air inlet airbag, 9-first inflation nozzle, 10-second inflation nozzle. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0022] In order to control the dual-channel flow of the dual-system ventilation and cooling intake duct, this application proposes to control the flow on both sides by controlling the throat area. The specific measures are: the throat area on both sides is changed by controlling and adjusting the profile of the flexible airbags arranged on both sides of the dual-system pipeline diverter. An inflation nozzle is arranged inside the airbag, and the profile of the flexible airbag is changed by inflating and deflating the airbag. The "single-side inflation", "double-side inflation" and "double-side non-inflation" states of the double-side airbags can be controlled according to different usage requirements.

[0023] refer to Figure 1-Figure 5 The ventilation cooling air intake duct of the present application includes a body surface 1 and a bulge 2 located on the body surface 1, a NACA air inlet 3 with a certain windward surface located on the bulge 2, the NACA air inlet 3 is a common inlet for dual systems, and the first air intake pipeline 4 and the second air intake pipeline 5 of the dual systems are located at the rear of the NACA air inlet 3 and are connected to each other through a diverter 6.

[0024] The front edge of the diverter 6 of the present application is semicircular, and flexible inflatable airbags are arranged on the two side walls of the rear part, namely the first air inlet airbag 7 and the second air inlet airbag 8. Figures 2 to 4 In the inflatable first air inlet bag 7 and the second air inlet bag 8, there are inflation nozzles arranged on the walls of both sides of the pipe, namely the first inflation nozzle 9 and the second inflation nozzle 10, through which the first air inlet bag 7 and the second air inlet bag 8 are supplied with air. Figure 5 shown.

[0025] The first inflation nozzle 9 and the second inflation nozzle 10 protrude from the wall by 1-3 mm. The number and aperture can be changed according to the change of inflation amount. The inflation nozzle also has the function of deflation to adjust the air volume in the airbag. The first inflation nozzle 9 and the second inflation nozzle 10 on both sides supply air separately. The airbags on both sides are designed independently and are not connected. Figure 5 shown.

[0026] By adjusting the inflation amount of the first air inlet airbag 7 and the second air inlet airbag 8, the airbag surface shape is changed, thereby changing the throat area of ​​the two pipes, thereby realizing the airflow flow distribution of the two pipes. The working state of the airbag can be adjusted, which is divided into three states: "single-side inflation", "double-side inflation" and "double-side non-inflation". It can be adjusted according to the working scene of double-sided ventilation and cooling. In the double-sided inflation state of the airbag, it corresponds to the small flow state of the dual system. In order to reduce resistance, the resistance entering the dual system is minimized as much as possible, while ensuring the normal operation of the double-sided system. At this time, if quantitative control is required, it is necessary to clarify the relationship between the airbag inflation amount and the deformation amount to strictly control the throat area.

[0027] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An airbag flow control dual-system ventilation and cooling inlet duct, characterized in that: The invention comprises a body surface (1), and a bulge (2) located on the body surface (1), wherein a NACA air inlet (3) is arranged on the bulge (2), and a first air inlet pipeline (4) and a second air inlet pipeline (5) of different sizes connected in parallel are connected at the rear end of the NACA air inlet (3), and a first air inlet airbag (7) is provided on the side wall of the first air inlet pipeline (4), and a second air inlet airbag (8) is provided on the side wall of the second air inlet pipeline (5); The NACA air inlet (3) has a windward surface, the windward surface is inclined relative to the surface of the bulge (2) and protrudes from the surface of the bulge (2), forming a common air inlet, the first air inlet pipeline (4) and the second air inlet pipeline (5) are arranged at the end of the common air inlet, and the front end is located at the highest point of the protruding bulge (2) surface of the windward surface, and the rear end extends into the body.

2. The airbag flow control dual system ventilation cooling inlet duct as claimed in claim 1, characterized in that: The first air intake pipeline (4) and the second air intake pipeline (5) are separated by a flow splitter (6); the front windward surface of the flow splitter (6) is an arc-shaped structure; and the first air intake airbag (7) and the second air intake airbag (8) are arranged on the two side walls of the rear part of the flow splitter (6), respectively.

3. The airbag flow control dual system ventilation cooling inlet duct as claimed in claim 2, characterized in that: A first inflation nozzle (9) and a second inflation nozzle (10) are respectively provided on the two side walls at the rear end of the diverter (6); the first inflation nozzle (9) is used to supply air to the first air inlet airbag (7), and the second inflation nozzle (10) is used to supply air to the second air inlet airbag (8).

4. The airbag flow control dual system ventilation cooling inlet duct as claimed in claim 3, characterized in that: The first inflation nozzle (9) and the second inflation nozzle (10) protrude from the wall surface by 1-3 mm.

5. The airbag flow control dual system ventilation cooling inlet duct as claimed in claim 3, characterized in that: The first inflation nozzle (9) and the second inflation nozzle (10) have a nozzle opening adjustment switch for changing the surface shape of the airbag by adjusting the inflation amount of the first inlet airbag (7) and the second inlet airbag (8), thereby changing the throat area of ​​the two pipes and achieving airflow distribution of the two pipes.

6. The airbag flow control dual system ventilation cooling inlet duct as claimed in claim 3, characterized in that: The first inflation nozzle (9) and the second inflation nozzle (10) also have an air-release function, and are used to adjust the amount of air in the airbag.

7. The airbag flow control dual system ventilation cooling inlet duct as claimed in claim 3, characterized in that: The first inflation nozzle (9) and the second inflation nozzle (10) supply and deflate air independently, and the airbags on both sides are independently designed and isolated from each other.

8. The airbag flow control dual system ventilation cooling inlet duct as claimed in claim 3, characterized in that: It also includes an air intake control system, which is configured to adjust the working state of the airbag to change between three states: single-side inflation, double-side inflation, and double-side non-inflation.

9. The airbag flow control dual system ventilation cooling inlet duct as claimed in claim 8, characterized in that: The double-sided inflation state corresponds to a small flow state of the double systems, in order to reduce resistance and reduce the resistance entering the double systems, while also ensuring the normal operation of the double-sided systems.

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