Hypersonic wave drag reduction performance of cylinders with repetitive laser energy depositions

被引：1
作者：
Fang, J. [1 ]
Hong, Y. J. [1 ]
Li, Q. [1 ]
Huang, H. [1 ]
机构：
[1] Acad Equipment Command & Technol, Beijing 101416, Peoples R China
来源：
3RD INTERNATIONAL PHOTONICS AND OPTOELECTRONICS MEETINGS (POEM 2010) | 2011年 / 276卷
关键词：
D O I：
10.1088/1742-6596/276/1/012021
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
It has been widely research that wave drag reduction on hypersonic vehicle by laser energy depositions. Using laser energy to reduce wave drag can improve vehicle performance. A second order accurate scheme based on finite-difference method and domain decomposition of structural grid is used to compute the drag performance of cylinders in a hypersonic flow of Mach number 2 at altitude of 15km with repetitive energy depositions. The effects of frequency on drag reduction are studied. The calculated results show: the recirculation zone is generated due to the interaction between bow shock over the cylinder and blast wave produced by energy deposition, and a virtual spike which is supported by an axis-symmetric recirculation, is formed in front of the cylinder. By increasing the repetitive frequency, the drag is reduced and the oscillation of the drag is decreased; however, the energy efficiency decreases by increasing the frequency.
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页数：7
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