Chapman-Jouguet deflagrations
Chapman-Jouguet deflagrations
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查普曼-茹格爆燃
DOI：
10.1098/rspa.1993.0082
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
J. H. Lee
中科院分区：
文献类型：
--
作者：
R. Chue;J. F. Clarke;J. H. Lee
实验观察到了两种准稳态高速爆燃。首先，它们是在粗糙的管子和含有障碍物的管子中产生并传播的反应波；其次，它们是通过从后者的结构中消除横向波，从已建立的爆轰中产生的爆燃。管子粗糙度、障碍物尺寸和管子直径的变化对爆燃传播速度没有显著影响。相对于流出反应波的产物气体，这些速度接近音速，并且观察到这两种爆燃的传播速度大约是相应的Chapman-Jouguet(CJ)爆速的一半。对由平面CJ爆燃驱动的平面前驱激波构成的构型进行了理论分析。结果与观测结果非常吻合，并支持这样的观点，即至少在这些观测期间，这种冲击和爆燃的组合是由反应混合物的能量控制的。
Two types of quasi-steady high-speed deflagration have been observed experimentally. In the first place they are reaction-waves created in, and propagating through, rough tubes and tubes that contain obstacles; in the second place they are deflagrations created from established detonations by eliminating the transverse waves from the latter’s structure. Changes in tube roughness, obstacle size and tube diameter have no significant influence on the speeds at which the deflagrations propagate. These speeds are close to sonic relative to product gases flowing out of the reaction-waves, and both classes of deflagration are observed to travel at about one-half of the corresponding Chapman-Jouguet (CJ) detonation speed. A theoretical analysis has been carried out on a configuration that consists of a plane precursor shock-wave driven by a plane CJ deflagration. Results agree very well with observations and support the idea that, at least for the duration of these observations, this combination of shock and deflagration is controlled by the energetics of the reacting mixture.