Issw 22 Detonation Diffraction
Issw 22 Detonation Diffraction
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Issw 22 爆炸衍射
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
R. Akbar
中科院分区：
文献类型：
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作者：
J. Shepherd;E. Schultz;R. Akbar
我们对比了爆轰和激波绕射问题的凸和凹的角落。爆轰与冲击波的区别在于存在与反应区相关的固有长度尺度。该反应区的范围取决于化学系统的性质和爆震波的速度。反应前沿厚度对波速的依赖性导致爆轰的衍射与冲击波有本质的不同。冲击波以自相似的方式在凹面和凸面的拐角处传播，但爆炸不会。爆炸偏离自相似性最显著地表现在凸角周围的衍射。在某些条件下，爆轰可能会退化为一个弱冲击波，然后是低速火焰。凹拐角附近的衍射也偏离自相似性，但该行为受冻结和平衡流的限制。
We contrast the problems of detonation and shock diffraction over convex and concave corners. Detonations are distinguished from shock waves by the presence of an intrinsic length scale associated with a reaction zone. The extent of this reaction zone depends on both the nature of the chemical system and the detonation wave speed. The dependence of the reaction front thickness on wave speed causes the diffraction of detonations to be essentially different from shock waves. Shock waves diffract in a self-similar manner around both concave and convex corners, but detonations do not. The departure of detonations from self-similarity is manifested most dramatically in diffracting around convex corners. Under certain conditions, a detonation can fail by degenerating into a weak shock followed by a low-speed flame. Diffraction around concave corners also departs from self-similarity but the behavior is bounded by the limits of frozen and equilibrium flow.