Rectangular Section Hypersonic Variable Geometry Inlet and Its Design Method and Working Mode

Abstract

The invention discloses a hypersonic variable-geometry air inlet channel with a rectangular section and belongs to the field of pneumatic design of aerospace aircrafts. A seam through which a lip mask adjustable side plate penetrates and moves is formed in the front body of an aircraft; one end of the lip mask adjustable side plate is linked with the leading edge of a lip mask with a rectangular section through a rotating motion pair and the other end of the lip mask adjustable side plate is connected with a side plate actuating barrel arranged in the front body of the aircraft; the side plate actuating barrel controls the lip mask adjustable side plate to rotate with single freedom degree. The invention further provides a design method and a work mode of the hypersonic variable-geometry air inlet channel with a rectangular section. By adjusting the sweep angle of the lip mask adjustable side plate, the adjustment of the air inlet channel from idle state to starting state and the increasing and decreasing of mach number flow rate capture rate of the air inlet channel are realized; the hypersonic variable-geometry air inlet channel with a rectangular section is simple in structure and easy to control; the work efficiency of the propulsion system of a suction type hypersonic aircraft is greatly increased.

Description

technical field [0001] The invention relates to a rectangular-section hypersonic variable-geometry inlet, a design method and a working method, and belongs to the field of aerodynamic design of aerospace vehicles. Background technique [0002] For hypersonic air-breathing aircraft, the excellent aerodynamic performance of the inlet in the design state cannot guarantee that it can work normally and stably in all key operating states. Especially for a hypersonic air-breathing aircraft operating in a wide Mach number range, when it is in a non-design working state, can the intake duct start normally and provide sufficient airflow quality for the engine with less resistance and flow loss? The required air flow rate will be an important criterion for evaluating the comprehensive aerodynamic performance of the intake port. [0003] The air inlet variable geometry technology refers to the use of the air inlet's own mechanical device or additional fluid, electromagnetic and other m...

AI Technical Summary

Problems solved by technology

For a hypersonic air-breathing vehicle, the complexity and control difficulty of the variable geometry device will greatly affect the working efficiency of the vehicle

[0004] At present, most of the existing technologies of variable geometry inlets that have been proposed only focus on solving a single problem, such as the low capture rate of low Mach number flow or the restarting problem of the inlet, and cannot be improved through a set of variable geometry inlets. The airway solves the problems of low Mach number flow capture rate and inlet restart at the same time

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