论文部分内容阅读
将常用于水翼、螺旋桨等的空化模型应用于离心泵空化流数值计算,以比转速为94的离心泵为研究对象,在不同流量系数下,分别进行了空化性能的数值计算和试验研究.比较了计算和试验得到的空化性能曲线,发现各流量系数下模拟均能捕捉到较低空化数时扬程系数的下降,而且与试验结果较为一致.此外,还对设计工况下叶轮流道空泡和总压系数分布规律以及叶片压力系数分布规律进行了分析.对数值预测结果的分析表明:使用Kunz空化模型进行离心泵空化流数值计算能够较为真实地反映离心泵的空化性能.
The cavitation model, which is commonly used in hydrofoil, propeller and so on, is applied to the numerical calculation of cavitation flow in centrifugal pump. Centrifugal pump with revolving speed of 94 is taken as the research object. Under different flow coefficients, Experimental results show that when the flow rate is lower than that of the lower cavitation number, the lift coefficient is reduced and the results are in good agreement with the experimental results.Furthermore, The law of the distribution of cavitation bubble and total pressure coefficient and the distribution rule of the pressure coefficient of blade were analyzed.The numerical results show that the numerical calculation of centrifugal flow in cavitation flow using Kunz cavitation model can more accurately reflect the centrifugal pump Cavitation performance.