高比转速轴流泵正交优化设计研究

袁建平1,范猛1,Giovanni Pace2,陆荣1,李彦军1,付燕霞3

振动与冲击 ›› 2018, Vol. 37 ›› Issue (22) : 115-121.

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (22) : 115-121.
论文

高比转速轴流泵正交优化设计研究

  • 袁建平1,范猛1,Giovanni Pace2,陆荣1,李彦军1,付燕霞3
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Orthogonal optimum design method for high specific-speed axial-flow pumps

  • YUAN Jianping1,FAN Meng1,Giovanni Pace2,LU Rong1,LI Yanjun1,FU Yanxia3
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摘要

为了研究叶轮与导叶匹配对高比转速轴流泵水力性能的影响,以一台比转速为1500的轴流泵为研究对象,选取了叶轮与导叶的7个几何参数进行正交试验优化设计。为拓宽其高效运行范围,本次优化以三个工况点(0.8Qd、1.0Qd、1.2Qd)的加权平均效率为优化目标,采用L18(37)正交表设计了18组方案。在ANSYS CFX 14.5中采用SST k-ω湍流模型对各方案进行定常计算。通过极差分析得到了各参数对目标影响的主次顺序并获得了最优参数组合。结果表明:优化后轴流泵加权平均效率提高了4.68%,大流量下效率提高十分明显,而设计扬程基本不变;叶轮与导叶的动静匹配对轴流泵水力性能有重要影响。

Abstract

An axial-flow pump with the high specific speed of 1 500 r/min was chosen to investigate the effect of the matching between its impeller and diffuser on its hydraulic performances.An optimization method of orthogonal experiment was applied based on selecting seven kinds of geometric parameters of the corresponding impeller and diffuser as the optimized variables.In order to broaden the high-efficiency region of the axial-flow pump, the weighted average efficiency at the flow rates of 80%, 100% and 120% of the design flow rate was set as the goal, and 18 kinds of design schemes were finally obtained based on the L18(37) orthogonal test.Meanwhile, the numerical simulation of the steady inner flow in the axial flow pump were carried out to predict the hydraulic performances of the pump and the comparison among the 18 kinds of design schemes was conducted by using the SST k-ω turbulence model in ANSYS CFX14.5.The primary and secondary order of the geometric parameters that affect the aimed efficiency were studied through the range analysis, and an optimal parameter combination were obtained.The results show that: the weighted average efficiency of the axial-flow pump after optimization increases by 4.68%.Furthermore, the hydraulic efficiency of the optimized axial-flow pump is improved significantly at large flow rates with the value of the pump head basically unchanged.It is shown that the matching between the impeller and diffuser, like a pair of rotor and stator, has a significant effect on the hydraulic performances of axial-flow pumps.

关键词

轴流泵 / 匹配 / 正交优化 / 数值模拟 / 水力性能

Key words

 Axial-flow pump / matching / orthogonal optimum design / numerical simulation / hydraulic performance / experiment

引用本文

导出引用
袁建平1,范猛1,Giovanni Pace2,陆荣1,李彦军1,付燕霞3. 高比转速轴流泵正交优化设计研究[J]. 振动与冲击, 2018, 37(22): 115-121
YUAN Jianping1,FAN Meng1,Giovanni Pace2,LU Rong1,LI Yanjun1,FU Yanxia3. Orthogonal optimum design method for high specific-speed axial-flow pumps[J]. Journal of Vibration and Shock, 2018, 37(22): 115-121

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