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首页> 外文期刊>Acta astronautica >Effects of slot injection on detonation wavelet characteristics in a rotating detonation engine
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Effects of slot injection on detonation wavelet characteristics in a rotating detonation engine

机译：槽注射对旋转爆轰发动机中爆轰小波特性的影响

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摘要

Two-dimensional numerical simulations are performed to investigate the effects of spatially discrete slot injection of reactants on the features of detonation wavelets in a rotating detonation engine (RDE). The detonation dynamics is described by a model based on the reactive Euler equations coupled with two-step, induction-reaction kinetics. By varying injection conditions and the chemical sensitivity of the reactive mixture, a parametric study is carried out to examine the influence of the injection-slot area ratio a on the detonation wavelet patterns and different flow features inside an RDE combustion chamber. The simulation results demonstrate that the injection conditions, i.e., stagnation temperature and pressure, have a similar influence on slot-ozzle rotating detonation wavelets (RDWs) as compared with the mini-nozzle RDWs reported in a previous study. The corresponding mass flow rate and inhomogeneity generated due to the presence of slot injection, however, play a key factor in the self-sustained rotating detonation and its frontal structure.
机译：进行二维数值模拟，以研究空间离散槽注入反应物对旋转爆轰发动机（RDE）中的爆轰小波特征的影响。基于与两步，诱导反应动力学偶联的反应性欧拉方程的模型描述了爆震动力学。通过改变注射条件和反应混合物的化学灵敏度，进行参数研究，以检查注射槽面积比A对RDE燃烧室内的爆炸小波图案的影响和不同的流动特征。仿真结果表明，与先前研究中报道的迷你喷嘴RDW相比，注射条件，即停滞温度和压力，对槽旋转爆震小波（RDW）具有类似的影响。然而，由于槽注射的存在而产生的相应质量流速和不均匀性起到自持续旋转爆轰的关键因素及其正面结构。

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