| 激光能量注入控制Ⅳ型激波干扰的数值研究 |
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| 引用本文： | 吴文堂,洪延姬,王殿恺,李倩.激光能量注入控制Ⅳ型激波干扰的数值研究[J].强激光与粒子束,2014,26(2):021008-55. |
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| 作者姓名： | 吴文堂 洪延姬 王殿恺 李倩 |
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| 作者单位： | 1.激光推进及其应用国家重点实验室装备学院, 北京 1 01 41 6 |
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| 基金项目： | 国家自然科学基金项目(91116010) |
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| 摘 要： | 激光能量注入可以控制Ⅳ型激波干扰,有效地减小钝头体压力载荷。基于有限体积法和分区结构网格划分的高分辨率数值方法,在来流马赫数为3.45的条件下,计算了单脉冲激光能量注入和连续激光能量注入对Ⅳ型激波干扰的影响。研究结果表明:单脉冲激光能量注入后一个较短时期内(50~60μs),钝头体表面压力突然升高,随后压力有一个较为明显的下降过程,然后恢复原状态;当注入的连续激光能量较小时,钝头体表面压力略微增大,随着注入能量增大,钝头体表面压力峰值减小;在注入能量到一定程度时,钝头体表面压力峰值减小已不明显。
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| 关 键 词： | 激光能量注入 数值研究 流动控制 激波干扰 |
| 收稿时间： | 2013-06-17; |
Numerical investigation of type Ⅳ shock interaction controlled by laser energy deposition |
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| Wu Wentang,Hong Yanji,Wang Diankai,Li Qian.Numerical investigation of type Ⅳ shock interaction controlled by laser energy deposition[J].High Power Laser and Particle Beams,2014,26(2):021008-55. |
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| Authors: | Wu Wentang Hong Yanji Wang Diankai Li Qian |
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| Affiliation: | 1.State Key Laboratory of Laser Propulsion and Application Academy of Equipment,Beijing 101416,China |
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| Abstract: | The injection of laser energy will change the wave structure and effectively reduce the pressure load on the blunt body surface. A high resolution numerical method based on finite volume method and domain decomposition of structural grid is used to compute the influence of laser single pulse energy and laser continuous energy injected into type Ⅳ shock interaction at Mach number 3.45.The result shows that the pressure on the blunt body surface increases slightly when the injection laser energy with a single pulse is in a relatively short period(50 μs to 60 μs ),then it declines quickly, and it restores to the original state at last. The peak of the pressure on the blunt body surface increases slightly after the injection of a little laser energy with continuous deposition, and then decreases quickly with the increase of the laser energy deposition. It is remarkable that the peak of the pressure decreases slowly and tends to be a constant value even the laser energy deposition increases again. |
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| Keywords: | numerical investigation flow control shock interaction |
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