高超发动机涡轮离心泵的能量和汽蚀性能研究

Research on Power and Cavitation Performance on a High-Speed Engine Turbine Centrifugal Pump

诱导轮的几何形状对于高超发动机涡轮离心泵的能量与汽蚀性能有很大影响。本文中利用RNG k-ε湍流模型和Schnerr-Sauer空化模型对于泵的基本流道、前置两种不同几何结构的变螺距诱导轮进行数值模拟,计算结果表明,通过在泵主叶轮前置变螺距诱导轮,可以显著的改善泵的能量与汽蚀性能前置叶尖直径为常数的变螺距诱导轮离心泵相比前置叶尖直径线性变化的变螺距诱导轮的离心泵,据有更好的汽蚀性能。

Inducer geometry has a significant effect on power and suction performance on a high-speed engine turbine centrifugal pump. In the present work, numerical simulation is performed on a high- speed engine turbine centrifugal pump without and with different variable pitch inducer and the RNG k-ε turbulent model and Schnerr-Sauer cavitation model are adopted to simulate the turbulent flow and mass transfer of working material. The result shows that the power and cavitation performance on a high-speed engine turbine centrifugal pump can be improved markedly by installing a variable pitch inducer before the impeller. The cavitation performance of pump with variable pitch inducer whose leaves diameter is constant is better than the one’s leaves diameter is variable.