为分析悬臂斜坡构型对超燃燃烧室內燃料的掺混效果以及射流的穿透深度改进效果的影响,采用数值方法对不同三维尺寸的悬臂斜坡喷注器的流场情况进行模拟研究。结果表明:斜坡压缩角增大对流场的掺混效果影响不大但可以增加射流穿透深度,同时也带来更大的总压损失;后掠角度的增加可增强掺混,但也造成总压损失的增加和穿透深度的减小;悬臂宽度在一定范围内适当减小可有效增加近场的穿透深度以及远场的掺混效率,减小总压损失。

In order to analyze the impact of cantilevered ramp configuration on the mixing effect of the fuel in scramjet combustor and the improvement effect of penetration depth of jet, the numerical method was used to simulate the flow field of a cantilever ramp injector with different dimensions. The results show that the increase of the ramp compression angle has little impact on mixing effect, but it can increase the jet penetration depth and bring about a greater total pressure loss; The increase of the angle of sweepback can enhance the blending, but also increases the total pressure loss and decreases the penetration depth; The appropriate reduction of cantilever width within a certain range can effectively increase the penetration depth of near field and the mixing efficiency of far field, and reduce the total pressure loss.