点火位置对激光等离子体减阻效能的影响
Fang Juan1, Hong Yanji2, Huang Hui2, Li Qian2, Liu Zhun1
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摘要: 利用激光等离子体减小高超声速飞行器波阻是一种新概念减阻方式，点火位置是研究减阻效能的重要参数。基于有限体积法和分区结构网格划分的高分辨力数值方法， 在气流马赫数为6.5、飞行高度为30 km条件下，计算了不同点火位置对减小高超声速飞行器波阻的影响。研究结果表明：利用激光等离子体可以有效地减小高超声速钝头体飞行器波阻；点火位置到驻点的距离与飞行器直径之比为2时，减阻效果最好，且数值模拟与理论计算结果吻合较好。Abstract: It is a new concept to reduce the wave drag of hypersonic vehicles by laser plasma, where the ignition location is an important research parameter. A second-order accurate scheme based on finite volume method and domain decomposition of structural grid is used to compute the influence of ignition location on drag reduction at Mach number of 6.5 and flight height of 30 km. The results show that laser plasma can effectively reduce hypersonic blunt body vehicle’s drag. When the ratio of the distance between ignition location and stagnation point to vehicle diameter is 2, the reduction effect is the best, and the results of numerical simulation and theory are consistent．
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Key words:
- drag reduction /
- ignition location /
- laser plasma /
- wave drag /
- hypersonic vehicle
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