两相正激波松弛流的数值研究

对气、固两相正激波松弛流动进行了数值研究,方程中考虑了压力梯度及非匀速运动引起的附加质量力。给出了完整的计算方法,对三种不同固相容积比、不同固相颗粒直径和不同马赫数分别进行了数值计算,所得计算结果给出了气、固两相的速度、温度、压力、密度、固相容积比及熵值沿流向分布情况。文章对气、固两相参数在松弛区中的变化规律进行了讨论。

A NUMERICAL STUDY ON GAS-SOLID TWO-PHASE RELAXATION FLOW BEHIND A NORMAL SHOCK FRONT

A numerica study of a mixture flow of gas-solid particles behind a normal shock front has been presented. Both the region before the shock front and far downstream region are equilibrium. Across the shock front, where the effects of the shock on the particles are negligible is called frozen How region. In the frozen region. the gas-phase will follow Rankme-Hugoniot relations exactly. The relaxation region is the region from shock front to far downstream region.In the relaxation region, the pressure gradient and the additional body force due to non-steady motion have been considered. From numerical calculation, three values including solid volume ratio, the solid particle diameter and the Mach unmber are given respectively. The velocity, temperature, pressure, density, solid-phase volume ratio and entropy variations along the flow direction are given as well.The variations of both gas-phase and solid-phase parameters have been discussed in detail. Computer program TWSH can be used to complete the whole calculation process.