火箭发动机气体-颗粒两相流双流体模型研究

Research on two-fluid model of gas-particle flow inrocket motors

探讨了两相流双流体模型中颗粒相压强、两相界面压强以及两相界面速度等若干关键问题,从理论上推导了双流体模型的控制方程,并讨论了颗粒相控制方程的双曲性。把LU隐式时间格式和Van-Leer矢通量分裂格式应用到两相流双流体模型中,并对一维等截面传热摩擦管道和轴对称JPL喷管中气固两相流进行了计算,计算结果与文献结果吻合良好,所建数学模型正确,所用数值计算方法可靠。

Several key problems such as pressure of particle phase, interfacial pressure and interfacial velocity in two-fluid model of two-phase flow were discussed. The governing equations of twofluid model were theoretically deduced, and the hyperbolic of the particle phase governing equations was examined. LU implicit time format and Van-Leer flux vector splitting format were applied in twofluid model. Gas-particle flows in the one-dimension prismatic lance with heating and friction and in the axisymmetric JPL nozzle were calculated individually. The calculation results accord well with the correspondent results in reference. It is proven that the model is effective and correct, and the numerical calculation method is reliable.