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为研究系列竖井型线的演变规律及其对贯流泵装置内流机理及运行稳定性的影响,在归纳分析竖井型线演变的基础上采用一维水力设计方法设计了4种型体的竖井流道.基于ANSYS CFX对4种不同竖井型体的贯流泵装置进行了三维湍流场的数值计算,定量分析了4种竖井流道的水力性能.引入无因次动量参数分析法对比分析了各竖井流道对泵装置运行稳定性的影响,流量系数K Q在0.317—0.634范围内各方案的泵装置动量参数均随流量系数增大而减小,4种竖井流道对泵装置运行稳定性的影响差异性很小.提出了泵装置多工况性能加权评价指标(M.P.I)定量分析了不同竖井流道对多工况运行时泵装置综合水力性能的影响,该方法可用于不同泵装置水力性能的分析及泵装置方案的优选.为验证数值计算的准确性和可靠性,对泵装置进行了物理模型试验,对比分析结果表明,数值计算的结果是可信的.
In order to study the evolution regularity of series of vertical shaft lines and its influence on the inflow mechanism and operation stability of the axial flow pump unit, based on the analysis of the evolution of the shaft profile, a four-shaped shaft was designed by one-dimensional hydraulic design Flow channel.According to ANSYS CFX, numerical simulation of three-dimensional turbulent flow field was carried out for four kinds of axial flow pump devices with different shaft shapes, and the hydraulic performance of the four kinds of vertical flow channels was quantitatively analyzed.Volumeless momentum parameter analysis The effect of runner flow path on the running stability of the pump device, the flow coefficient KQ in the range of 0.317-0.634, the pump device momentum parameters of all schemes decrease with the increase of the flow coefficient, and the running stability of the four kinds of vertical runners to the pump device (MPI) is proposed to quantitatively analyze the influence of different vertical runners on the comprehensive hydraulic performance of multi-working-time pump device. This method can be used to measure the hydraulic performance of different pump devices Performance analysis and optimization of pump device scheme.In order to verify the accuracy and reliability of the numerical calculation, the physical model test of the pump device was carried out. The results of comparative analysis show that the numerical calculation of the junction It is credible.