摘要
为了研究旋转爆轰燃烧室内复杂的波系结构,特别是爆轰波多波传播模式的影响因素,采用两步诱导-放热总包反应模型,对简化的二维旋转爆轰波进行数值模拟。在不考虑环形爆轰燃烧室曲率的情况下,研究了进口总温和周向尺寸对单波及多波流场结构的影响。结果表明,一定范围内进口总温的增加会使得爆轰波的波头数目增加,且双波流场结构中存在双波对撞和双波同向两种传播形式,双波同向传播和三波同向传播之间则稳定存在着两组双波对撞流场,且有对应的温度范围;对于双波对撞模式,持续减小周向尺寸能够使得流场结构转变成单波模式;周向尺寸的增加则会使得双波对撞向双波同向传播模式转变。
In order to research the complex wave structures of the rotating detonation combustor,especially the factors of multiple detonation waves propagation mode,the two-dimensional simplified rotating detonation waves were simulated by solving numerically the reactive Euler equations with a two-step induction-reaction overall kinetic model. Under the condition of ignoring the curvature of the annular detonation combustor,the effects of circumferential size and total temperature on the flow field structure of single and multiple rotating detonation waves(RDW)were investigated. The present numerical results show that the number of the detonation wave front increases for the increasing stagnation temperature within a certain range. For the two waves propagation process,there are two different propagation modes: two-waves collision and two-waves co-propagation. Between the two-waves co-propagation and the three-waves co-propagation,there also exists stably double two-collision propagation mode,which has a corresponding temperature range. For the collision mode,the two-waves collision mode can transform into the one-wave mode with the decrease of circumferential size and the increasing circumferential size results into the generation of the two-waves co-propagation mode.
引文
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