【摘要】 为分析工作液压力及流速、安装高度对液体射流泵空化流动的影响，应用Realizable k-ε湍流模型结合SchnerrSauer空化模型，对面积比为4的液体射流泵进行研究，并通过与试验数据进行对比，验证了模型的有效性。计算结果表明：射流泵工作液压力及射流速度从196 kPa、22.60 m/s提高至462 kPa、33.87 m/s，初生流量比到极限流量比的工况范围明显减小，从0.234降至0.108；射流泵安装高度从3.0 m降低到-2.0 m时，初生流量比从1.250增加至1.713，极限流量比从1.435增加至1.907。较大的工作液压力及流速会加快空化初生到极限空化的发展过程，实际应用时可通过降低射流安装高度减免空化发生。研究成果可为分析液体射流泵空化影响因素，减免空蚀破坏提供依据。更多还原

【Abstract】 The Realizable k-ε turbulence model and Schnerr-Sauer cavitation model were used to analyze the effects of working fluid pressure,flow rate and installation height on cavitation characteristics of liquid jet pump. The liquid jet pump with area ratio of 4 was studied,and the validity of the model was verified by comparing with the hydraulic test data of jet pump. The calculation results show that the working pressure and jet velocity of the liquid jet pump increase from 196 kPa and 22.60 m/s to 462 kPa and 33.87 m/s,and the operating range of incipient cavitation flow ratio to limit flow ratio decreases obviously from 0.234 to 0.108. When the installation height of jet pump decreases from 3.0 m to-2.0 m,the incipient cavitation flow ratio increases from 1.250 to 1.713,and the limit flow ratio increases from 1.435 to 1.907. Large working pressure and flow velocity will accelerate the development process of cavitation from incipient cavitation to ultimate cavitation. Cavitation can be reduced by lowering the jet mounting height in practical application. The research results can provide a basis for analyzing cavitation factors and reducing cavitation damage of liquid jet pump.更多还原