The influence of the inlet swirling flow on the regression rate of the fuel in the combustion chamber of the solid fuel ramjet is investigated in this study using numerical simulations. The finite-volume solver of the compressible turbulent reacting flow is developed to study the flow field where the burning rate is computed using the conjugate heat transfer method for the solid fuel. The correlation is found for the maximum regression rate versus an imposed inlet swirl when the linear distribution of the circumferential velocity is applied at the inlet stream. Although the regression rate augmentation is considerable due to the swirling flow field in the combustor, it is shown that the swirl is effective if is applied near the shear layer of the backstep flow in the combustor. The modified swirler with short blades is suggested to be used in solid fuel ramjets to increase the regression rate of the fuel and improve the performance, but with lower pressure loss.

在本研究中，使用数值模拟研究了进气涡流对固体燃料冲压发动机燃烧室中燃料回归速率的影响。开发了可压缩湍流反应流的有限体积求解器，以研究使用固体燃料的共轭传热方法计算燃烧速率的流场。当圆周速度的线性分布应用于进口流时，可以找到最大回归速率与施加的进口涡流之间的相关性。尽管由于燃烧器中的涡流场而使回归速率的增加相当大，但是显示出如果在燃烧器中的后向流的剪切层附近施加涡流，则涡旋是有效的。