The Numerical Study on Active Control of Vortex Plasma Jet Flow in The Rotor Blade Tip

Abstract In order to improve the flow characteristics of the rotor tip vortex, a jet flow is generated by the tip plasma exiter, which interferes with the formation and evolution and development of the blade tip vortex. To achieve the purpose of improving blade vortex interference noise. In this paper, a numerical method is used to establish a rotor blade tip jet flow calculation method. The characteristics of the tip vortex wake are analyzed in the hovering state which after the jet flow is loaded, and a law of the development and evolution of the tip vortex with different jet flow parameters is given. The result show that the tip vortex vorticity of the loaded tip jet flow is weakened, and the induced vortex generated by the jet flow cracks the baseline wake vortex, reducing The strength of the weak rotor tip vortex is reduced, with the increase of the jet flow hoel diamenter, the tip vortex weakens; the jet flow velocity is deflected downward, and the vertical component of the jet flow will offset the rotational velocity formed by the tip vortex, weakening the tip vortex vorticity, with the increase of jet flow declination angle, the weakening degree of tip vortex vorticity is stronger, with the increse of jet flow velocity, the tip vortex is weakened, the jet flow velocity reaches 100m/s, and the wake angle ψ=45° vorticity peak weakened by 31%, wake angle ψ=90° vorticity peak weakened by 22%.