·信息技术·郑国胜,等·变几何涡轮平面叶栅流场数值仿真与试验研究第一作者简介:郑国胜(1995—),男,陕西咸阳人,硕士研究生,研究方向为叶轮机气动力学。DOI:10.19344/j.cnki.issn1671-5276.2023.01.034变几何涡轮平面叶栅流场数值仿真与试验研究郑国胜1,关瑞卿1,冯小毛1,刘长青2,葛宁1(1.南京航空航天大学能源与动力学院,江苏南京210016;2.中国航发湖南动力机械研究所,湖南株洲412002)摘要:取某两级动力涡轮2级导叶叶中截面数据,布置为平面叶栅以验证其流场周期性。设计并加工了基于齿轮传动的变几何平面叶栅试验件,并进行变几何与固定几何的PIV试验研究,获得叶栅通道出口区域流场数据,进行对比分析。结果表明:固定几何工况下,从PIV试验得到的速度云图中可清晰地看出叶片尾缘尾迹及扩散过程,与仿真结果吻合良好;变几何工况下的PIV数据可揭示由叶片转动所引起的流场结构变化。关键词:变几何平面叶栅周期性;固定几何PIV试验;变几何PIV试验中图分类号:V231.3文献标志码:B文章编号:1671-5276(2023)01-0141-04NumericalSimulationandExperimentalResearchforPlaneCascadeofVariableGeometryTurbineZHENGGuosheng1,GUANRuiqing1,FENGXiaomao1,LIUChangqing2,GENing1(1.CollegeofEnergyandPowerEngineering,NanjingUniversityofAeronauticsandAstronautics,Nanjing210016,China;2.AECCHunanAviationPowerplantResearchInstitute,Zhuzhou412002,China)Abstract:Withthemiddlecross-sectiondataofacertaintwo-stagepowerturbinesecondaryguidevanebeingassignedasaplanecascadetoverifytheperiodicityofitsflowfield,avariablegeometryplanecascadetestpiecebasedongeartransmissionwasdesignedandprocessed.PIVtestsandreserchonvariablegeometryandfixedgeometrywerecarriedouttoabtaintheflowfielddataoftheoutletareaofthecascadechannel,andonwhichcomparisonandanalysisweremade.Theresultsshowthatunderthefixedgeometrycondition,thewakeanddiffusionprocessofthebladetrailingedgecanbeclearlyseeninthevelocitynephogramobtainedbyPIVtest,andtheirresultsareingoodagreementwiththesimulationresults.AndthePIVdatarevealsthechangeofflowfieldstructurecausedbybladerotationundervariablegeometryconditions.Keywords:periodicityofvariablegeometryplanecascade;fixedgeometryPIVtest;var...