基于响应面与遗传算法的液力透平叶轮优化设计
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摘要
建立了基于试验设计、响应面近似和遗传算法优化的液力透平叶轮优化设计方法。通过ANSYS CFX数值模拟得到其外特性,原始模型数值计算结果与试验结果外特性吻合较好。以设计工况下的水力效率和扬程为目标函数,利用响应面方法(RSM)分别得到设计参数与目标函数之间的显式表达式,采用NSGA-Ⅱ遗传算法得到最优叶轮参数组合。优化后水力模型效率提高3.2%。结果表明,响应面方法与NSGA-Ⅱ遗传算法相结合的优化方法适用于液力透平叶轮的优化设计。
An optimization method for hydraulic turbine impeller was established based on the experimental design theory,the response surface approximation and genetic algorithm.The external characteristics are obtained by using the commercial software ANSYS CFX,and the results of the original model are in good agreement with the experimental results.The efficient and head were chosen as objective functions,and the response surface method(RSM)is used to obtain the explicit expression between the design parameters and the objective functions.The optimal combination of the parameters of the impeller is chosen by the NSGA-Ⅱ genetic algorithm.The hydraulic efficiency of the optimized model rises by 3.2%,which indicates that the optimization method combining response surface method and NSGA-Ⅱ genetic algorithm is suitable for the optimization design of hydraulic turbine impeller.
An optimization method for hydraulic turbine impeller was established based on the experimental design theory,the response surface approximation and genetic algorithm.The external characteristics are obtained by using the commercial software ANSYS CFX,and the results of the original model are in good agreement with the experimental results.The efficient and head were chosen as objective functions,and the response surface method(RSM)is used to obtain the explicit expression between the design parameters and the objective functions.The optimal combination of the parameters of the impeller is chosen by the NSGA-Ⅱ genetic algorithm.The hydraulic efficiency of the optimized model rises by 3.2%,which indicates that the optimization method combining response surface method and NSGA-Ⅱ genetic algorithm is suitable for the optimization design of hydraulic turbine impeller.
引文
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[12]王春林,叶剑,曾成,等.基于NSGA-Ⅱ遗传算法高比转速混流泵多目标优化设计[J].农业工程学报,2015,31(18):100-106.
[13]Kim J H,Lee H C,Kim J H,et al.Improvement of hydrodynamic performance of a multiphase pump using design of experiment techniques[J].Journal of Fluids Engineering,2015,137(8):081301-15.
[2]王晓晖,杨军虎,史凤霞.能量回收液力透平的研究现状及展望[J].排灌机械工程学报,2014,32(9):742-747.
[3]陈杰,花亦怀,苏清博,等.中国首套LNG液力透平系统开发与工业化测试[J].天然气工业,2016,36(5):95-105.
[4]苗森春,杨军虎,王晓晖,等.基于神经网络-遗传算法的液力透平叶片型线优化[J].航空动力学报,2015,30(8):1918-1925.
[5]王桃,孔繁余,刘莹莹,等.叶片进口安放角对泵作透平外特性影响的数值模拟与验证[J].农业工程学报,2017,33(15):98-104.
[6]史广泰,杨军虎.离心泵用作液力透平叶轮出口滑移系数的计算方法[J].农业工程学报,2014,30(13):68-77.
[7]杨孙圣,孔繁余,薛玲,等.长短叶片对液力透平性能的影响[J].农业机械学报,2012,43(7):104-107.
[8]朱蕾,彭海菠,胡磊,等.基于响应曲面法的液力透平叶轮多目标优化设计[J].液压气动与密封,2014,34(3):7-12.
[9]袁寿其,王文杰,裴吉,等.低比转数离心泵的多目标优化设计[J].农业工程学报,2015,31(5):46-52.
[10]Zhu B,Wang X,Tan L,et al.Optimization design of a reversible pump-turbine runner with high efficiency and stability[J].Renewable Energy,2015,81:366-376.
[11]代翠,孔繁余,董亮,等.基于响应面法的离心泵作透平水力和声学性能优化[J].农业工程学报,2015,31(15):40-47.
[12]王春林,叶剑,曾成,等.基于NSGA-Ⅱ遗传算法高比转速混流泵多目标优化设计[J].农业工程学报,2015,31(18):100-106.
[13]Kim J H,Lee H C,Kim J H,et al.Improvement of hydrodynamic performance of a multiphase pump using design of experiment techniques[J].Journal of Fluids Engineering,2015,137(8):081301-15.