Experimental Investigation on Airfoil Shock Control by Plasma Aerodynamic Actuation

来自 Semantic Scholar

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131

作者：

SUN Quan，CHENG Bangqin，LI Yinghong，CUI Wei，JIN Di，LI Jun

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摘要：

An experimental investigation on airfoil (NACA64-215) shock control is performed by plasma aerodynamic actuation in a supersonic tunnel (Ma = 2). The results of schlieren and pressure measurement show that when plasma aerodynamic actuation is applied, the position moves forward and the intensity of shock at the head of the airfoil weakens. With the increase in actuating voltage, the total pressure measured at the head of the airfoil increases, which means that the shock intensity decreases and the control effect increases. The best actuation effect is caused by upwind-direction actuation with a magnetic field, and then downwind-direction actuation with a magnetic field, while the control effect of aerodynamic actuation without a magnetic field is the most inconspicuous. The mean intensity of the normal shock at the head of the airfoil is relatively decreased by 16.33%, and the normal shock intensity is relatively reduced by 27.5% when 1000 V actuating voltage and upwind-direction actuation are applied with a magnetic field. This paper theoretically analyzes the Joule heating effect generated by DC discharge and the Lorentz force effect caused by the magnetic field. The discharge characteristics are compared for all kinds of actuation conditions to reveal the mechanism of shock control by plasma aerodynamic actuation.

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关键词：

Practical, Theoretical or Mathematical, Experimental/ aerodynamics aerospace components flow control shock wave effects supersonic flow/ normal shock intensity mean intensity downwind-direction actuation magnetic field upwind-direction actuation actuation effect control effect airfoil head total pressure actuating voltage pressure measurement schlieren measurement supersonic tunnel plasma aerodynamic actuation airfoil shock control voltage 1000 V/ A4740K Supersonic and hypersonic flows A4740N Shock-wave interactions A4785 Applied fluid mechanics A4762 Flow control E2130 Fluid mechanics and aerodynamics (mechanical engineering) E2210 Mechanical components/ voltage 1.0E+03 V