固体燃料冲压发动机高速旋转对进气道稳定工作范围的影响

Effect of High Speed Spinning of Solid Fuel Ramjet on Steady Operation Range of Its Inlet

为了研究高速旋转对固体燃料冲压发动机进气道稳定工作范围的影响,利用计算流体力学软件对所设计的进气道在马赫数为3.0的设计状态进行了数值模拟,获得了进气道在不旋转、转速分别为10 kr/min和30 kr/min的稳定工作范围、流场结构和总体性能。结果表明:转速越高进气道稳定工作范围越窄,但变化较小,对进气道的流场特征和各性能参数的影响较小;高速旋转时进气道的总压恢复系数、出口马赫数比未旋转时略高,流量系数和总压畸变指数基本没有变化。

For investigating influence of high speed spinning of the solid fuel ramjet on steady operation range of its inlet, the designed inlet was simulated numerically by computational fluuid dynamics at Mach number of 3, to obtain steady operation ranges at non-spinning, spin speeds of 10 kr/min and 30 kr/min, flowfield structures and overall performance of the inlet. The simulated results show that range of steady operation decreases with the increasing of spin speed, of which variation is smaller, influences on flow characteristics and performance parameters are smaller; total pressure recovery coefficient of the inlet and Mach number of the outlet at high speed spinning are a little higher than those at non-spinning, mass capture ratio of the inlet and total pressure distortion index of the outlet at high speed spinning are the same as those at non-spinning.