轴流泵多目标优化正交试验

发布时间：2018-10-18 16:28

【摘要】：为了整体提高轴流泵的水力优化设计水平,找出影响轴流泵性能的主要几何参数,运用正交试验方法,以扬程、效率、轴功率和压力脉动作为试验评判指标,将综合频率分析法应用到轴流泵多目标优化设计中。基于L_9(3~4)正交表得到了9组方案,研究叶片数、翼型、轮毂比和叶片与导叶间距离对轴流泵的扬程、效率、轴功率和压力脉动的影响规律,并通过综合频率分析法确定了一组最佳试验方案。结果表明:该最佳试验方案在设计流量下,水流在叶轮及导叶段中的流态较好,水流流线顺畅,分布相对均匀;轴流泵模型在流量和扬程满足改型要求的同时,效率提高了5.7%;轴功率下降了1.21%;压力脉动系数降低了11%,验证了综合频率分析法在多目标正交优化中的可行性。
[Abstract]:In order to improve the hydraulic optimum design level of axial flow pump as a whole and find out the main geometric parameters that affect the performance of axial flow pump, the orthogonal test method is used to evaluate the performance of axial flow pump with lift, efficiency, shaft power and pressure pulsation. The synthetic frequency analysis method is applied to the multi-objective optimization design of axial flow pump. Nine groups of schemes were obtained on the basis of LSP 9 (3 / 4) orthogonal table. The effects of blade number, airfoil, wheel hub ratio and distance between blade and guide vane on the lift, efficiency, shaft power and pressure pulsation of the axial flow pump were studied. A group of optimal test schemes were determined by comprehensive frequency analysis method. The results show that the flow pattern in the impeller and guide vane is better, the flow line is smooth and the distribution is relatively uniform, and the axial flow pump model meets the requirements of the modification of the flow rate and the head at the same time as the flow rate and the head meet the requirements of modification. The efficiency is increased by 5.7, the axial power is reduced by 1.21, and the pressure fluctuation coefficient is reduced by 11, which verifies the feasibility of the comprehensive frequency analysis method in the multi-objective orthogonal optimization.
【作者单位】：河海大学水资源高效利用与工程安全国家工程研究中心;河海大学水利水电学院;河海大学能源与电气学院;江苏省江都水利工程管理处;
【基金】：国家自然科学基金重点项目(51339005)、国家自然科学基金面上项目(51579080) 安徽省自然科学基金面上项目(1608085ME119)
【分类号】：TH312

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