旋转爆轰波中多波流动模式的数值研究

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.