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时间:2020-05-20
《长叶片透平级多学科多目标优化设计-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第48卷第1期西安交通大学学报Vo1.48No.12014年1月JoURNALOFXI’AN儿AOTONGUNIVERSITYJan.2014DOI:10.7652/xjtuxb201401001长叶片透平级多学科多目标优化设计李彬,宋立明,李军,丰镇平(西安交通大学叶轮机械研究所,710049,西安)摘要:针对长叶片透平级优化问题,结合自适应多目标差分进化算法、基于3次非均匀B样条曲线的曲面造型技术及透平级气动和强度性能分析评价方法,建立了长叶片透平级多学科多目标优化设计系统,其中气动性能评估采用数值求解三
2、维RANs方程完成,长叶片强度分析采用有限元方法完成。长叶片透平级的优化设计目标是比功率最大和最大等效应力最小,设计变量是透平级静叶和动叶型线的三维参数化控制参数。采用所建优化设计系统获得了长叶片透平级的7个多学科优化非受控解(Pareto解)。3个典型的Pareto解与参考叶型进行比较分析显示,优化后Pareto解下的气动和强度性能均优于参考叶型设计方案,从而验证了所建优化设计系统的实用性。关键词:长叶片;透平级;气动性能;强度;多学科设计优化中图分类号:TK263文献标志码:A文章编号:0253—987X
3、(2014)01—0001—06MultidisciplinaryandMultiobjectiveOptimizationDesignofLongBladeTurbineStageLIBin,SONGLiming,LIJun,FENGZhenping(InstituteofTurbomachinery,Xi’anJiaotongUniversity,Xi’an710049,China)Abstract:Themultidisciplinaryandmultiobjectiveoptimizationdesi
4、gnsystembasedontheself—adaptivemulti—objectivedifferentialevolution(SMODE)algorithm,cubicnon—uniformB-splinecurvesbasedsurfacemodelingtechnology,andaerodynamicandstrengthperformanceevaluationofturbinestagewasdevelopedfortheoptimizationoflongbladeturbinestag
5、es.Theaerodynamicperformanceofthedesignedlongbladeturbinestageisevaluatedbythethree—dimensionalReynolds—averagedNavier—Stokes(RANS)solution.Thestrengthofthelongbladeisobtainedusingthefiniteelementanalysisapproach.Theoptimizationdesignobjectivesoftheturbines
6、tagearethemaximizationofspecificpowerandtheminimizationofmaximumvonMisesstress.Thedesignvariablesaredeterminedbythestatorandrotorbladeparameterizationmethod.Withthepresentoptimizationsystem,sevenParetosolutionsofthelongbladestagewereobtained.Thethreetypica1
7、Paretosolutionswereselectedtoanalyzetheaerodynamicandstrengthperformanceoftheoptimizedbladegeometryandtocomparewiththeoriginaldesign.TheresultsshowthattheaerodynamicandstrengthperformanceoftheParetosolutionsobtainedaresuperiortotheoriginaldesign,thusconfirm
8、ingtheavailabilityofthepresentmultidisciplinaryandmultiobjectiveoptimizationdesignsystemforlongbladeturbinestages.Keywords:longblade;turbinestage;aerodynamicperformance;strength;multidisciplinarydesign
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