基于CFD和多目标算法的离心叶轮参数优化
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摘要
为了研究叶片出口安装角和叶片数对叶轮气动性能优化的影响,对某离心压缩机叶轮建立理论数值模型,利用多目标遗传算法对模型寻优。对优化的结果圆整处理后进行参数化建模,并通过CFD叶轮在设计工况点压缩比提高3.57%,等熵效率提高0.79%,叶轮整体情况得到改善,可为离心压缩机叶轮的优化设计提供参考。
In order to study the influence of blade outlet setting angle and number of blades on the optimization of impeller's aerodynamic performance,a theoretical numerical model was established for the impeller of a centrifugal compressor,and the multi-objective genetic algorithm was used to optimize the model. The optimization results were parameterized after round-off and verified by CFD numerical simulation. Finally,the compression ratio of the impeller was increased by 3.57% at the design point,the isentropic efficiency was increased by 0.79%,and the overall condition of the impeller was improved,which can provide a reference for the optimization design of the impeller of the centrifugal compressor.
In order to study the influence of blade outlet setting angle and number of blades on the optimization of impeller's aerodynamic performance,a theoretical numerical model was established for the impeller of a centrifugal compressor,and the multi-objective genetic algorithm was used to optimize the model. The optimization results were parameterized after round-off and verified by CFD numerical simulation. Finally,the compression ratio of the impeller was increased by 3.57% at the design point,the isentropic efficiency was increased by 0.79%,and the overall condition of the impeller was improved,which can provide a reference for the optimization design of the impeller of the centrifugal compressor.
引文
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[15]赵科,童水光,吕红兵,等.压缩机用直线振荡电机防失磁设计研究[J].机电工程,2018,35(5):524-528.
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[17]Bonaiuti D,Arnone A,Ermni M,et al.Analysis and optimization of transonic centrifugal compressor impllers using the design of experiments technique[J].ASME Journal of Turbomachinery,2002,6:1089-1098.
[2]李文华,钟瑞兴.叶轮损失模型对离心压缩机性能预测的影响[J].流体机械,2008,36(4):25-29.
[3]吴亚东,曹安国,刘鹏寅,等.Pareto多目标算法在离心压缩机蜗壳优化中的应用[J].航空动力学报,2016,31(1):92-99.
[4]冀春俊,徐浩,孙琦,等.基于Kriging模型的快速拆装叶轮轮盘多目标优化设计[J].风机技术,2017,59(3):44-48.
[5]孙晔晨,田玉宝,席光,等.三元叶片型面造型对离心压缩机叶轮气动性能影响的数值研究[J].西安交通大学学报,2015,49(11):135-141.
[6]Huang R F,Luo X W,Ji B,et al.Multi-objective optimization of a mixed-flow pump impeller using modified NSGA-II algorithm[J].Sci China Tech Sci,2015,58(12):2122-2130.
[7]Khalfallah S,Ghenaiet A,Benini E,et al.Surrogatebased shape optimization of stall margin and efficiency of a centrifugal compressor[J].Journal of Propulsion and Power,2015,31(6):1-14.
[8]左曙光,韦开君,吴旭东,等.采用Kriging模型的离心压缩机叶轮多目标参数优化[J].农业工程学报,2016,32(2):77-83.
[9]舒信伟,谷传纲,肖军,等.基于均匀设计和遗传算法的离心压缩机叶片优化设计[J].动力工程学报,2007(5):713-716.
[10]皮艳慧.PCL803型离心压缩机叶轮结构参数影响分析[D].南充:西南石油大学,2014.
[11]李学臣,席光,李心伟.离心压缩机中间级内流数值研究[J].工程热物理学报,2010,31(6):955-958.
[12]王常勇.离心压缩机快速建模及数值分析[D].武汉:华中科技大学,2008.
[13]赖喜涛,温卫东,冯大俊.基于Kriging模型的离心叶轮结构优化设计[J].沈阳航空航天大学学报,2014(4):17-22.
[14]黄文俊,陈启明,饶杰,等.符合材料离心叶轮应力和振动有限元计算与分析[J].流体机械,2017,45(2):17-21.
[15]赵科,童水光,吕红兵,等.压缩机用直线振荡电机防失磁设计研究[J].机电工程,2018,35(5):524-528.
[16]Liu H L,Wang K,Kim H B,et al.Experimental investigation of the unsteady flow in a double-blade centrifugal pump impeller[J].Sci China Tech Sci,2013,56:812-817.
[17]Bonaiuti D,Arnone A,Ermni M,et al.Analysis and optimization of transonic centrifugal compressor impllers using the design of experiments technique[J].ASME Journal of Turbomachinery,2002,6:1089-1098.