Effect of concentrated energy deposition on the aerodynamic drag of a blunt body in hypersonic flow
Effect of concentrated energy deposition on the aerodynamic drag of a blunt body in hypersonic flow
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DOI：
10.1063/1.2565663
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发表时间：
2007-03
影响因子：
4.6
通讯作者：
K. Satheesh;G. Jagadeesh
中科院分区：
文献类型：
--
作者：
K. Satheesh;G. Jagadeesh
本文报道了高超声速气流中60°半角钝锥结构上游电弧放电能量沉积效应的实验结果。在高超声速激波风洞中，以空气和氩气为试验气体，进行了阻力测量和高速纹影流动显示研究，在氩气环境中进行的能量沉积实验中，观察到了约50%的非定常阻力减小（最大减小）。这些研究还表明，放电对流场的影响在氩气环境中比在空气中更明显，这证实了热效应是主要负责与放电的流动变化。还观察到，高超声速流与放电丝的相互作用导致非定常流场的发展。
Experimental results on the effect of energy deposition using an electric arc discharge, upstream of a 60° half angle blunt cone configuration in a hypersonic flow stream is reported. Investigations involving drag measurements and high speed Schlieren flow visualization have been carried out in a hypersonic shock tunnel using air and argon as the test gases; and an unsteady drag reduction of about 50% (maximum reduction) has been observed in the energy deposition experiments done in argon environment. These studies also show that the effect of discharge on the flow field is more pronounced in argon environment as compared to air, which confirms that thermal effects are mainly responsible for flow alteration with discharge. It has also been observed that the interaction of the hypersonic flow with the discharge filament results in the development of an unsteady flow field.