论文部分内容阅读
为了研究在脉冲控制方式下,准直流横向放电等离子体对超燃冲压发动机燃烧室燃料喷流流场的影响,构建了脉冲控制下准直流横向放电等离子体模型,分析了不同脉冲控制频率下等离子体对凹腔喷流流场特征结构、燃烧室总压损失、喷流下游掺混效率的影响。结果表明:脉冲控制模式下,等离子体能够有效控制喷流上游分离激波位置与强度、幅度,导致凹腔流场参数周期性波动,使得燃料与主流的掺混效率提高,与定常控制方式相比脉冲控制方式能够减小压力损失。
In order to study the influence of impinging lateral discharge plasma on the fuel jet flow field in the scramjet combustor under impulsive control mode, a pulse-controlled lateral discharge plasma model of collimated flow was constructed. The effects of plasma at different pulse control frequencies The effects of cavities jet flow characteristics, total pressure loss in the combustion chamber, and mixing efficiency downstream of the jet were studied. The results show that the plasma can effectively control the location, intensity and amplitude of the upstream shock wave in the pulse control mode, causing periodic fluctuations of the flow field parameters in the cavity. The mixing efficiency of the fuel and the mainstream is improved. Compared with the steady control mode Than the pulse control can reduce the pressure loss.