可压稀相两相流场的数值模拟

Numerical simulation compressible dilute two-phase flow

针对可压两相流动 ,在阻力系数中考虑了可压缩性及颗粒聚积所造成的影响 ,用TVD格式对沙层、平板及JPL喷管内的气固稀相两相流进行了数值模拟 ,所获结果和已有的实验数据及有关文献吻合很好。在JPL喷管中 ,随着质量分数的增加 ,由于气体和颗粒间的相互作用逐渐增强 ,气相的温度增大 ,马赫数减小 ,但压力变化很小。而随着颗粒直径的增加 。

In compressible two phase flow, drag coefficient including the influence of compressibility and particle accumulation was accounted for. The computation uses TVD algorithm for both gas and particle, numerical computation of dilute gas particle two phase turbulent flow over sand bed, a flat plate and in JPL nozzle were performed. The calculations agree well with the experimental data. In JPL nozzle, with increasing loading ratio, the interaction becomes strong, the gas temperature is increased, and the Mach number is decreased, but the influence of the loading ratio on the pressure is very small. With increasing particle diameter, the gas axial temperature is decreased.