Variable incidence scramjet engine outboard cowl

Abstract

The invention relates to a variable incidence scramjet engine outboard cowl, which comprises side walls and a fixed lower wall surface; two sides of the fixed lower wall surface are provided with the side walls; a turning axle arranged on a lip of the fixed lower wall surface is hinged with an adjustable lower wall surface under the fixed lower wall surface; and the adjustable lower wall surface deflects around the turning axle by the driving of a drive mechanism, and the deflection position of the adjustable lower wall surface is limited by a limiting and locking mechanism. In the variable incidence scramjet engine outboard cowl, the adjustable lower wall surface deflecting around the lip of the fixed lower wall surface is arranged under the fixed lower wall surface, and the change of aeroperformance of an aerocraft is realized by adjusting the incidence of the adjustable lower wall surface, so that the aerocraft obtains the optimal aeroperformance under different flight regimes.

Description

technical field The invention relates to a technology for configuration design of a hypersonic aircraft with a scramjet engine as a power system, in particular to a high aerodynamic performance outer fairing of a scramjet engine. Background technique A hypersonic vehicle is one that travels in the atmosphere and across the atmosphere at speeds of Mach 5 or higher. When the aircraft flies at hypersonic speed, the wave resistance and frictional resistance increase sharply, which leads to the increase of aerodynamic resistance and the decrease of engine thrust margin, resulting in a serious thrust-drag matching problem. In order to reduce drag and increase lift, and ensure the overall performance of the aircraft, the fuselage and engine are generally designed with a high degree of integration, that is, the front of the fuselage is integrated with the engine inlet, and the rear of the fuselage is integrated with the exhaust nozzle of the engine. One. Hypersonic aircraft power...

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Problems solved by technology

However, for the outer fairing of the engine, especially the research on the configuration design of the outer fairing to improve the aerodynamic performance, no relevant literature or patent has been found.

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