At present, in the case of pump fast optimization, there is a problem of rapid, accurate and effective prediction of cavitation performance. In “A Cavitation Performance Prediction Method for Pumps PART1 -Proposal and Feasibility” [1], a new cavitation performance prediction method is proposed, and the feasibility of this method is demonstrated in combination with experiments of a mixed flow pump. However, whether this method is applicable to vane pumps with different specific speeds and whether the prediction results of this method are accurate is still worthy of further study. Combined with the experimental results, the research evaluates the sensitivity and accuracy at different flow rates. For a certain operating condition, the method has better sensitivity to different flow rates. This is suitable for multi-parameter multi-objective optimization of pump impeller. For the test mixed flow pump, the method is more accurate when the area ratios are 13.718% and 13.826%. The cavitation vortex flow is obtained through high-speed camera, and the correlation between cavitation flow structure and cavitation performance is established to provide more scientific support for cavitation performance prediction. The method is not only suitable for cavitation performance prediction of the mixed flow pump, but also can be expanded to cavitation performance prediction of blade type hydraulic machinery, which will solve the problem of rapid prediction of hydraulic machinery cavitation performance.

目前，在泵快速优化的情况下，存在快速、准确、有效预测空化性能的问题。在“泵的汽蚀性能预测方法第 1 部分 - 建议和可行性”中” [1]，提出了一种新的空化性能预测方法，并结合混流泵的实验证明了该方法的可行性。但是，该方法是否适用于不同比转速的叶片泵，该方法的预测结果是否准确，仍有待进一步研究。结合实验结果，研究评估了不同流速下的灵敏度和准确度。对于一定的工况，该方法对不同的流速有较好的灵敏度。这适用于泵叶轮的多参数多目标优化。对于测试混流泵，当面积比为13.718%和13.826%时，该方法更准确。空化涡流是通过高速摄像机获得的，建立空化流动结构与空化性能的相关性，为空化性能预测提供更科学的支持。该方法不仅适用于混流泵的汽蚀性能预测，还可以扩展到叶片式水力机械的汽蚀性能预测，解决水力机械汽蚀性能的快速预测问题。