Numerical Study on Critical Wedge Angle of Cellular Detonation Reflections
查看参考文献20篇
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文摘
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The critical wedge angle (CWA) for the transition from regular reflection (RR) to Mach reflection (MR) of a cellular detonation wave is studied numerically by an improved space-time conservation element and solution element method together with a two-step chemical reaction model. The accuracy of that numerical way is verified by simulating cellular detonation reflections at a 19.3° wedge. The planar and cellular detonation reflections over 45°–55° wedges are also simulated. When the cellular detonation wave is over a 50° wedge, numerical results show a new phenomenon that RR and MR occur alternately. The transition process between RR and MR is investigated with the local pressure contours. Numerical analysis shows that the cellular structure is the essential reason for the new phenomenon and the CWA of detonation reflection is not a certain angle but an angle range. |
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来源
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Chinese Physics Letters
,2010,27(2):024701-1-024701-4 【核心库】
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DOI
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10.1088/0256-307x/27/2/024701
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关键词
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Angling
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Reflectance
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Simulation
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Elements
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地址
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1.
LTCS and College of Engineering Peking University, Beijing, 100871
2.
LHD, Institute of Mechanics Chinese Academy of Sciences, Beijing, 100190
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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0256-307X |
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学科
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物理学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:3890770
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