The presence of solid particles in the flow of hypersonic wind tunnels damages the appearance of the experiment models in the wind tunnel and influences the accuracy of experimental results. The design of a highly efficient gas–solid separator was therefore undertaken. Particle trajectory imaging methods were used to measure trajectories under different conditions. The flow field and particle movement characteristics for different head angles (HAs) and separation tooth angles (STAs), inlet velocities, and the exhaust gas outlet pressures in the separator, were calculated using simulations based on the discrete phase model. The particle separation efficiency, pressure loss, and flow loss resulting from different structural parameters were also studied. In line with experimental observations, the characteristic angle of particle movements in the separator and the separation efficiency of the separator were found to increase with decreasing HA and with increasing STA. Separation efficiency improves with increasing inlet velocity and with increasing negative pressure of the exhaust gas outlet; however, the corresponding pressure loss and the flow rate of the waste gas also increased.

高超声速风洞流中存在固体颗粒会破坏风洞中实验模型的外观，并影响实验结果的准确性。因此，进行了高效气固分离器的设计。粒子轨迹成像方法用于测量不同条件下的轨迹。使用基于离散相模型的模拟，计算了分离器中不同的顶角（HAs）和分离齿角（STAs），入口速度以及废气出口压力的流场和颗粒运动特性。还研究了不同结构参数导致的颗粒分离效率，压力损失和流动损失。根据实验观察，发现随着HA的减少和STA的增加，分离器中颗粒运动的特征角和分离器的分离效率均增加。分离效率随着进气速度的增加和排气出口负压的增加而提高。然而，相应的压力损失和废气的流量也增加了。