论文部分内容阅读
发展了一种用时间推进方法求解叶轮机械内部不可压流动的计算程序。在这个程序中， 使用分布体力方法简化湍流粘性的求解过程， 根据Ｂａｌｄｗ ｉｎ－Ｌｏａｍ ｘ 两层代数湍流模型确定粘性应力的大小。程序中还使用局部时间步长和多重网格数值技术加速收敛。火箭燃料主泵前诱导轮内部流场的实例计算表明， 采用这一计算程序能够正确预测叶轮机械内部不可压流场。
A computational program to solve the incompressible flow in the impeller is developed by using the time advance method. In this program, the distributed body force method is used to simplify the solution of turbulent viscosity. The magnitude of viscous stress is determined according to Baldw in-Loam x two-layer algebraic turbulence model. The program also uses local time-step and multi-grid numerical techniques to accelerate convergence. An example calculation of the internal flow field of the inducer before rocket fuel main pump shows that this calculation program can correctly predict the incompressible flow field inside the impeller.