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为了深入研究旋转爆轰发动机工作过程,采用高精度高分辨率迎风通量分裂格式(AUSMPW+)、氢氧7组分8反应化学动力学模型,求解三维带化学反应的Euler方程。对旋转爆轰发动机工作过程进行了数值模拟,分析了采用预爆轰管点火过程的流场特征以及整个发动机推力、推力偏心距、侧向力随时间的变化规律。计算结果表明:切向预爆轰管紧贴喷注入口时,点火过程仅产生一道单向爆轰波,能成功点燃旋转爆轰发动机;在本文给定的计算条件下,旋转爆轰发动机平均推力约180N,旋转爆轰波传播频率约为14285Hz;旋转发动机正常工作过程中,推力偏心矩、侧向力随时间周期性变化。
In order to further study the working process of rotary detonation engine, Euler equation of three-dimensional chemical reaction was solved by high-resolution high-resolution upwind fluxes fission format (AUSMPW +) and hydrogen-oxygen 7-component reaction kinetic model. The working process of the rotary detonation engine was numerically simulated. The characteristics of the flow field, the thrust, thrust eccentricity and lateral force variation with the time of the pre-detonation tube were analyzed. The calculation results show that when the tangential pre-detonation tube is close to the injection inlet, only one unidirectional detonation wave is generated during the ignition process, which can successfully ignite the rotary detonation engine. Under the calculation conditions given in this paper, the average of the rotary detonation engine Thrust about 180N, rotary detonation wave propagation frequency of about 14285Hz; rotating engine during normal operation, thrust eccentric moment, lateral force changes periodically with time.