摘要
本文应用三维Navier-Stokes方程和κ-ε两方程湍流模型以及全空化模型,对一台喷水推进混流泵叶轮内的空化流动进行数值模拟。介绍了空化流动的模拟方法,并计算了混流泵的空化性能指标,有效地预测了叶片上空化发生的区域和空化流动的发展情况。文中还对两种进口相对流动角作了数值计算,结果表明小的相对流动角可以提高混流泵的空化性能,但却使扬程有所下降。
In this paper,numerical simulation of cavitation phenomenon in a mixed-flow waterjet pump has been performed by calculating the full cavitation model and Navier-Stokes equation with k-εturbulence model.The results show cavitation zones on the leading edge-suction side of the machine as expected.Simulations at diffrent suction specific speeds were performed for the waterjet pump and showed the proper trends of changes in cavity strength and sizes.The cavitation behavior of the mixed-flow pump has been investigated by changed the inlet angle.The results shows that small inlet angle could improve cavitation performance but with some head rise degradation.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第z1期165-168,共4页
Journal of Engineering Thermophysics
关键词
喷水推进混流泵
全空化模型
数值计算
空化性能
mixed-flow waterjet pump
full-cavitation model
numerical simulation
cavitation performance
