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Three-dimensional numerical study on rotating detonation engines using reactive Navier-Stokes equations

机译：旋转爆轰发动机基于反应纳维-斯托克斯方程的三维数值研究

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Three-dimensional simulations on the rotating detonation engine (RDE) are conducted by solving the Navier-Stokes equations in stoichiometric hydrogen/air mixtures. Free-slip wall and non-slip wall boundary conditions are considered. The emphasis is placed on the effects of the viscosity, mass diffusion and thermal conduction on the detonation wave in the RDE, especially in the boundary layer. The simulation results show that the detonation wave propagates with a lower velocity in the Navier-Stokes solutions compared with that in the Euler solutions. This is mainly due to the effects of mass diffusion and thermal conduction. Meanwhile, the two effects above reduce the pressure of the detonation wave in the mainstream. Moreover, the detonation wave height is higher in the Navier-Stokes solutions than that in the Euler solutions. The temperature behind the detonation wave near the walls is much higher than that inside the chamber due to the existence of the boundary layer. Therefore, the viscosity, mass diffusion and thermal conduction impact the detonation velocity, pressure, the detonation wave height and temperature in the RDE. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：通过求解化学计量氢/空气混合物中的Navier-Stokes方程，对旋转爆震发动机（RDE）进行了三维模拟。考虑了自由滑墙和防滑墙的边界条件。重点放在粘度，质量扩散和热传导对RDE中爆炸波的影响上，尤其是在边界层中。仿真结果表明，与欧拉解法相比，纳维尔-斯托克斯解法的爆轰波传播速度更低。这主要是由于质量扩散和热传导的影响。同时，以上两种效果降低了主流爆轰波的压力。此外，在Navier-Stokes解决方案中，爆炸波的高度比在Euler解决方案中更高。由于边界层的存在，靠近壁的爆震波后面的温度比室内的温度高得多。因此，粘度，质量扩散和热传导会影响RDE中的爆轰速度，压力，爆轰波高度和温度。 （C）2019 Elsevier Masson SAS。版权所有。

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