A Supersonic Boundary Layer Transition Control Method Based on Synthetic Dual Jet Exciters

Abstract

The invention provides a supersonic boundary layer transition control method based on a novel synthetic dual-jet exciter. The novel synthetic dual-jet exciter is installed on the surface of a supersonic vehicle or at an air inlet and any other areas in which boundary layer transition needs to be controlled. In the flight process of the supersonic vehicle, the novel synthetic dual-jet exciter is started, and the interior of the boundary layer can be disturbed by disturbance waves and jet vortexes produced by the novel synthetic dual-jet exciter. The boundary layer can be corrected by the disturbance waves, and an upcast motion of the hairpin vortex head and up-spray and down-sweep motions of streamwise vortexes can be suppressed by the jet vortexes, so that 'wave control' and 'vortex control' of supersonic boundary layer transition can be effectively realized; and therefore, active control of the boundary layer transition is realized. The disturbance waves and vorticity forming the jetsimultaneously act on the boundary layer, the control ability of the synthetic jet on flow of the supersonic boundary layer is improved, and effective control of low-momentum synthetic jet on the supersonic boundary layer transition can be realized.

Description

technical field [0001] The invention relates to a boundary layer flow control method, in particular to a supersonic boundary layer transition control method based on a synthetic double-jet actuator. Background technique [0002] The existence of the boundary layer and its separation from the object surface are the origin of the frictional resistance and shape resistance of the object moving in the fluid. The shape design, flight stability and aerodynamic control of aircraft in the aerospace field, the drag and noise reduction of surface and underwater ships, submarines, and torpedoes, the shape design and motion stability of transportation tools such as high-speed trains, automobiles, and ships, The wind engineering design of bridges, tunnels, and buildings, and the flight of neutron bullets, shells, and missiles in national defense weapons will all be affected by the flow state and stability of the boundary layer. Boundary layer flow control can enhance / weaken flow stabili...

AI Technical Summary

Problems solved by technology

Steady jet and wall suction are active control methods, which can broaden the control range, but require fluid supply and pipeline systems, making the structure complex and bulky

Wall cooling and wall heating can effectively improve the flow stability of the boundary layer under certain working conditions, but their structure is complex, energy consumption is high, control speed is slow, and the load requirements of the aircraft are high

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