文中通过数值模拟研究平衡流与非平衡流的差异和适用情况,为两相流数值模拟中选择合理的计算模型提供相应的参考。采用高雷诺数条件下的k-ε湍流模型、双流体模型以及全流速SIMPLE方法分别对发动机内的两相平衡流与非平衡流进行模拟研究。计算结果表明,平衡流与非平衡流计算得到的两相流场在喷管的扩张段存在差异,且差异随着膨胀比的增加而更加明显,因此当喷管扩张比较大时按非平衡流计算更准确。

To provide corresponding reference for choosing reasonable calculation model in numerical simulation of two-phase flow, the difference and suitable situation of equilibrium flow and non-equilibrium flow were studied through numerical simulation. The ke turbulence model under high Reynolds number, two-fluid model and full-speed SIMPLE method were used to simulate equilibrium flow and nonequilibrium flow in solid rocket motors. Calculation results show that the difference existing in the expansion nozzle segment, and the difference is more obvious with increase of expansion ratio. We can conclude that the simulation result of two-phase is more accurate when the expansion ratio of nozzle is relatively large.