关键词: 气体与液体两相旋转爆轰, 守恒元与求解元方法, 非结构化网格, 数值模拟

Abstract: In order to investigate the gasoline/oxygen-enriched air continuously rotating detonation engines(RDE), the conservation elements and solution elements method (CE/SE method) based on the unstructured triangular meshes is used for the simplified 2D simulation of two-phase continuously RDE. The different propagation modes of rotating detonation waves (RDW) were obtained. The influences of total inlet pressure and equivalent ratio were studied and the operating performance of RDE was analyzed. The results show that the evaporation and stripping of droplets delay the combustion of fuel, which leads to the incomplete coupling of detonation peak pressure and peak temperature. The equivalent ratio has a great influence on the propagation mode of rotating detonation waves. A single-wave RDW is easily generated under low equivalent ratio,and a multiple RDW is generated under higher equivalent ratio. The detonation wave pressure and velocity fluctuations of single-wave mode are the smallest, those of double-wave mode are moderate and those of three-wave mode are the largest, but the thrust fluctuation law of propagation mode is opposite to that of pressure fluctuation. The thrust fluctuation of single-wave mode is the largest, followed by double-wave mode, and the thrust fluctuation of three-wave mode is the smallest. The calculated velocity and flow field of the rotating detonation agree well with the experimental results. The numerical research is meaningful for the development of unstructured-mesh CE/SE method. The calculated results have a guidance effect on the experimental research and engineering application of two-phase RDE. Key

Key words: gas-liquidrotatingdetonation, CE/SEmethod, unstructuredmeshes, numericalsimulation