Novel deformable bulge for DSI air inlet channel of airplane

Abstract

The utility model belongs to the technical field of airplane design, and particularly relates to a novel deformable bulge for a DSI air inlet channel on an airplane, which comprises a flexible bulge surface and a plurality of groups of support springs, the flexible bulge surface is arranged at the air inlet of the DSI air inlet channel, and the air inlet amount of the air inlet is reduced or increased when the flexible bulge surface expands or contracts; the supporting springs are arranged between the inner side face of the flexible bulging face and the aircraft inner structural part, and the flexible bulging face is made of shape memory alloy materials. According to the deformable bulge provided by the utility model, the air inflow of an aircraft under different flight conditions can be adjusted by changing the size of the bulge, so that an engine can exert the maximum effect under any condition. Therefore, the performance of the aircraft is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft design, and particularly relates to a novel deformable bulge used for a DSI air inlet on an aircraft. Background Art

[0002] The bulge air inlet has incomparable advantages over traditional air inlets in terms of weight reduction, space utilization, and stealth performance. However, this type of supersonic bulge air inlet cannot adjust the air intake volume because it does not have an adjustable ramp and other mechanisms. When flying beyond the design speed (especially at low speed), the engine cannot perform at its maximum efficiency. Therefore, it is particularly important to develop a deformable bulge that allows the DSI air inlet to adjust the air intake volume. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a new deformable bulge for a DSI air inlet on an aircraft to solve the problem that the existing DSI air inlet cannot adjust the air intake volume, including a flexible bulge surface and multiple groups of support springs;

[0004] The flexible bulge surface is arranged at the air inlet of the DSI air inlet duct, and its expansion or contraction reduces or increases the air intake volume of the air inlet;

[0005] A plurality of groups of supporting springs are arranged between the inner side surface of the flexible bulge surface and the internal structural parts of the aircraft.

[0006] Furthermore, the flexible bulge surface is made of shape memory alloy material.

[0007] Furthermore, the springs are arranged in three groups and are evenly fixed on the inner side of the flexible bulge surface.

[0008] The deformable bulge provided by the utility model can adjust the air intake of the aircraft under different flight conditions by changing the size of the bulge, so that the engine can play the maximum effect in any situation, thereby achieving the purpose of improving the performance of the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] Among them, 1-flexible bulge surface; 2-air inlet; 3-spring. DETAILED DESCRIPTION

[0011] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0012] refer to Figure 1, The utility model provides a new type of deformable bulge for use on a DSI air inlet on an aircraft, characterized in that it includes a flexible bulge surface and multiple groups of supporting springs;

[0013] The flexible bulge surface is arranged at the air inlet of the DSI inlet duct. Its expansion or contraction reduces or increases the air intake of the air inlet. The flexible bulge surface is made of shape memory alloy material. Its shape gradually stretches as the temperature rises. There are multiple groups of springs 3, and three groups are drawn here. When the aircraft is parked on the ground or flying at a low speed, the surface temperature of the bulge is not high and it is in a compressed state. As the flight speed of the aircraft increases, especially when the speed is 2 to 3 Ma, the surface temperature of the aircraft rises, and the bulge surface made of shape memory alloy gradually stretches, so that the bulge gradually becomes larger and the air intake area is reduced to meet the air intake needs of the aircraft at high speed.

[0014] As an improvement on the solution, multiple groups of support springs, three groups in this embodiment, are evenly fixed on the inner side of the flexible bulge surface, and the other ends are fixed on a frame on the aircraft or a fixable structure, so as to evenly stretch the flexible bulge surface from several points.

[0015] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new type of deformable bulge for a DSI air inlet on an aircraft, characterized in that: It includes a flexible bulging surface and multiple groups of supporting springs; The flexible bulge surface is arranged at the air inlet of the DSI air inlet duct, and its expansion or contraction reduces or increases the air intake volume of the air inlet; A plurality of groups of supporting springs are arranged between the inner side surface of the flexible bulge surface and the internal structural parts of the aircraft.

2. A novel deformable bulge for a DSI air inlet on an aircraft as claimed in claim 1, characterized in that: The flexible bulge surface is made of shape memory alloy material.

3. A novel deformable bulge for a DSI air inlet on an aircraft as claimed in claim 1, characterized in that: The springs are arranged in 3 groups and are evenly fixed on the inner side of the flexible bulge surface.

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