Effects of steady flow heating by arc discharge upstream of non-slender bodies
Effects of steady flow heating by arc discharge upstream of non-slender bodies
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DOI：
10.1007/s00193-011-0307-1
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发表时间：
2011-02
期刊：
影响因子：
2.2
通讯作者：
E. Schülein;A. Zheltovodov
中科院分区：
文献类型：
--
作者：
E. Schülein;A. Zheltovodov
在马赫数为5的路德维格管装置上，研究了锥头和球形钝体上游的低压直流弧光放电对定常能量添加的影响。结果包括阻力测量和阴影图流动显示。本文分析了弓形激波/加热尾迹相互作用产生的流场结构，以及弓形激波强度和加热功率对减阻效果的影响。结果表明，存在一个最佳的加热速率，提供最大的能量添加效率，并根据试验条件和模型几何形状显示出高达70%的显著减阻效果。
The influence of steady energy addition into the flow by a low-voltage DC-arc discharge located upstream of conically nosed and spherically blunted bodies was investigated experimentally in the Ludwieg-Tube Facility at Mach 5. The results include drag force measurements and shadowgraph flow visualizations. The flow-field structure, arising due to the bow-shock/heated-wake interaction, as well as the bow-shock intensity and heating power effects on the drag reduction is analyzed in this paper. The results demonstrate the existence of an optimum heating rate, providing a maximum effectiveness of energy addition and showing distinct drag reductions up to 70% dependent on test conditions and model geometries.