| 环形射流初始压力对激波聚焦起爆的影响分析 |
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| 引用本文： | 曾昊,何立明,章雄伟,李海鹏,陈鑫.环形射流初始压力对激波聚焦起爆的影响分析[J].航空动力学报,2010,25(9):1964-1970. |
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| 作者姓名： | 曾昊 何立明 章雄伟 李海鹏 陈鑫 |
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| 作者单位： | 空军工程大学,工程学院,西安,710038 |
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| 基金项目： | 空军工程大学 学术基金(XS0901009) |
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| 摘 要： | 为了研究射流入射压力对环形激波聚焦爆震起爆的影响,以氢气和空气混合物为例,对不同射流入射压力下环形激波聚焦爆震起爆过程进行了数值模拟,结果表明,当环形射流入射强度足够大时,其形成的激波聚焦能够形成高温、高压区域,从而直接起爆爆震波;爆震管推力壁对激波具有反射加强作用,有助于爆震波的形成;环形射流入射压力存在一个临界值,低于此值时,则不能起爆爆震波.
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| 关 键 词： | 脉冲爆震发动机 爆震起爆 爆震波 环形激波 数值模拟 |
| 收稿时间： | 2009/12/17 0:00:00 |
| 修稿时间： | 2010/5/25 0:00:00 |
Investigation on the influence of jet pressure on detonation initiation via imploding annular shock waves |
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| ZENG Hao,HE Li-ming,ZHANG Xiong-wei,LI Hai-peng and CHEN Xin.Investigation on the influence of jet pressure on detonation initiation via imploding annular shock waves[J].Journal of Aerospace Power,2010,25(9):1964-1970. |
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| Authors: | ZENG Hao HE Li-ming ZHANG Xiong-wei LI Hai-peng and CHEN Xin |
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| Affiliation: | The Engineering Institute,Air Force Engineering University,Xi'an 710038,China;The Engineering Institute,Air Force Engineering University,Xi'an 710038,China;The Engineering Institute,Air Force Engineering University,Xi'an 710038,China;The Engineering Institute,Air Force Engineering University,Xi'an 710038,China;The Engineering Institute,Air Force Engineering University,Xi'an 710038,China |
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| Abstract: | In order to investigate the influence of jet pressure on detonation initiation via imploding annular shock waves,detonation initiation with different jet pressures was simulated with hydrogen-air mixture.The results indicate that,when jet pressure is high enough,imploding annular shock waves can form high pressure and high temperature region that lead to direct initiation;thrust wall can strengthen reverberation shock,which contributes to initiate detonation;when the jet pressure is lower than its critical value,detonation can not be initiated. |
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| Keywords: | pulse detonation engine detonation initiation detonation wave annular shock waves numerical simulation |
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