DSI (diverterless supersonic inlet) capable of being adjusted by deformation

A technology of deformation adjustment and air inlet, which is applied in the field of shape memory, can solve the problem that the flight condition of DSI air inlet cannot provide the best aerodynamic shape, and achieve the effect of improving aerodynamic layout, improving aerodynamic efficiency, and improving flight performance

Inactive Publication Date: 2019-09-20
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the present invention is that the existing DSI inlet can not provide the best aerodynamic shape for specific flight conditions

Method used

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  • DSI (diverterless supersonic inlet) capable of being adjusted by deformation
  • DSI (diverterless supersonic inlet) capable of being adjusted by deformation
  • DSI (diverterless supersonic inlet) capable of being adjusted by deformation

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Embodiment Construction

[0036] In an aircraft, the section of air intake from the inlet of the aircraft to the inlet of the engine is called the engine inlet, and the DSI inlet is a new type of inlet, which is called supersonic inlet without boundary layer in Chinese. Airway, used in F-35 and other aircraft. As a two-dimensional inlet, the DSI inlet has no boundary layer partition, and there is a bulge at the inlet, which acts as a boundary layer partition. At the same time, the forward-swept lip changes the The pressure distribution of the air inlet makes the central pressure of the air inlet high, the pressure near both sides is low, and the pressure near the fuselage is the lowest. Works in conjunction with the forward-swept lip to function as the existing air intake. The DSI air intake has the characteristics of simple structure, light weight, low resistance, and invisibility. However, due to the difficulty of design, it requires extremely high levels of aerodynamics and computer technology. Cur...

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Abstract

The invention provides a DSI (diverterless supersonic inlet) capable of being adjusted by deformation and relates to the technical field of shape memory. The DSI capable of being adjusted by deformation comprises a bump, wherein the bump comprises skin, negative-Poisson-ratio honeycomb and driving devices, wherein the skin is connected with the negative-Poisson-ratio honeycomb, and the negative-Poisson-ratio honeycomb is connected with the driving devices; the skin is made of a shape memory material, and the shape memory material comprises a glassy state and a rubbery state, and the mutual switching between the glassy state and the rubbery state is driven by external motivation; and when the shape memory material is in the rubbery state, the driving devices drive the negative-Poisson-ratio honeycomb and the skin to deform. According to the DSI capable of being adjusted by deformation, by means of the skin made of the shape memory material and the negative-Poisson-ratio honeycomb connected with the skin, the appearance of the bump can be changed according to actual flight conditions, and improvement of flight performance of an airplane is facilitated.

Description

technical field [0001] The invention relates to the technical field of shape memory, in particular to a deformable and adjustable DSI inlet. Background technique [0002] In the aircraft, the DSI inlet (supersonic inlet without boundary layer) adopts a fixed bulge to simulate the first and second adjustable inclined plates in the conventional inlet, which can realize the compression of the airflow, and purpose of simplifying the structure, etc. However, the shape of the existing DSI inlet is determined by a fixed value pre-calculated by the computer according to computational fluid dynamics. The shape of the inlet is designed in consideration of various flight conditions, so that the aircraft can fly under various flight conditions. The optimal solution under certain conditions, but for specific flight conditions, the existing DSI inlet can not provide the best aerodynamic shape. [0003] It can be seen that the existing DSI inlet needs to be further improved. Contents o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C7/042F02C7/057F02C7/24
CPCF02C7/042F02C7/057F02C7/24
Inventor 冷劲松刘彦菊孙健杜林喆
Owner HARBIN INST OF TECH
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