高速涡轮泵额定工况空化特性及压力脉动预测

Characteristics of Cavitation and Prediction of Pressure Fluctuation at Rated Condition in High-Speed Turbopump

本文通过SSTk-ω湍流模型和ZGB空化模型对某种涡轮泵进行了空化流场计算,得到了其水力性能曲线和空化性能曲线,对设计工况下涡轮泵内部流场和压力脉动特性进行了分析。结果表明,涡轮泵易在三个位置发生空化,诱导轮前后的压力脉动主要由诱导轮叶片通过频率决定,蜗壳内部压力脉动受动静干涉影响较大。

This paper used SST k —ω turbulence model and ZGB cavitation model to simulate cavitation flow field in a turbopump.Its hydraulic performance curves and cavitation performance curves were obtained and the inner flow distribution and pressure fluctuation characteristics in this turbopump were analyzed under the design point.Results show that there are three cavitation regions,and the pressure fluctuation in the front of inducer and behind the inducer is determined by the inducer blade passing frequency.Rotor-stator interaction impacts the pressure fluctuation in the volute.