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受电弓参数和列车长度对高速列车气动阻力影响的数值研究(英文) Title:NumericalStudyontheInfluenceofPantographParametersandTrainLengthontheAerodynamicResistanceofHigh-SpeedTrains Abstract: High-speedtrainshavebecomeanintegralpartofmoderntransportationsystemsduetotheirefficiencyandspeed.Theaerodynamicresistanceexperiencedbythesetrainsplaysacrucialroleindeterminingtheirperformanceandenergyconsumption.Thisstudyaimstoinvestigatetheimpactofpantographparametersandtrainlengthontheaerodynamicresistanceofhigh-speedtrainsusingnumericalsimulations.Throughtheanalysisoftheresults,valuableinsightscanbegained,leadingtotheoptimizationofpantographdesignandtrainoperation. Introduction: Thepantographisacrucialcomponentofelectrictrainsthatisresponsiblefordrawingpowerfromoverheadcatenarywires.However,theinteractionbetweenthepantographandthesurroundingairflowcancreatesignificantaerodynamicresistance,ultimatelyleadingtoincreasedenergyconsumptionanddecreasedtrainperformance.Understandingtheinfluenceofpantographparametersandtrainlengthonaerodynamicresistanceisessentialfordevelopingefficientandsustainablehigh-speedtrainsystems. LiteratureReview: Previousstudieshavefocusedonunderstandingtheoverallaerodynamicsofhigh-speedtrainsandtheinfluenceofvariousfactorssuchastrainnoseshape,crosswind,andtrainspacing.However,limitedresearchhasbeenconductedspecificallyontheeffectsofpantographparametersandtrainlength.Hence,thisstudyaimstofillthisgapandprovidemeaningfulinsights. Methodology: Thecomputationalfluiddynamics(CFD)methodwillbeemployedinthisstudytosimulatetheairflowaroundthehigh-speedtrain.Thenumericalmodelwillbevalidatedusingexperimentaldatafrompreviousstudies.Thepantographparametersthatwillbeinvestigatedincludetheshape,size,andpositioningofthepantographhead.Thetrainlengthwillbevariedbyaddingorsubtractingtraincarriagestoobserveitsimpactonaerodynamicresistance. ResultsandDiscussion: Theaerodynamicresistanceanddragcoefficientofthehigh-speedtrainwillbecalculatedandanalyzedfordifferentpantographparametersandtrainlengths.Theresultsobtai