爆轰波在扩张管内临界传播特性的研究

由于稀疏波的作用，爆轰波在变截面扩张管内传播时会发生衰减。临界条件下，爆轰波恰能在扩张管内维持自持传播的特性，称为爆轰波的临界传播特性。针对Ｃ＿２Ｈ＿２－Ｏ＿２－Ａｒ不同的爆轰气体成份，在不同扩张半角的方形扩张管内，作者研究了临界初压ｐ＿（ｃｒ）、胞格尺寸Ｓ与扩张半角的关系，用Ｗｈｉｔｈａｍ理论与重点火准则分析了爆轰波在扩张管的传播，得到胞格尺寸的计算值与实验值基本相符。

INVESTIGATION ON THE DETONATION WAVE PROPAGATING THROUGH DIVERGENT TUBES UNDER CRITICAL CONDITIONS

Owing to the action of rarefaction,detonation waves are weakened when theytravel through divergent tubes. Under some critical conditions,the detonation can be survival,which corresponds to the critical detonation.The critical initial pressure p_(cr) and the cell size of themixture C_2H_2 O_2 Ar related to the semi-divergent angle were measured in variant divergenttubes. Finally, Whitham theorem and re-ignition criteria are used to analyze the detonation propa-gation in the divergent tube.The calculated cell sizes are in good agreement with the measuredones.