3、A文章编号:1672−7207(2011)12−3894−05Wind tunnelexperimental of impact on aerodynamic characteristicsfor vehicle bypantograph equipmentZHANGLei,YANGMingzhi(KeyLaboratoryofTrafficSafetyon Track,MinistryofEducation,SchoolofTraffic&Transportation Engineering,CentralSout
4、h University,Changsha410075,China)Abstract:In orderto study the impactofpantograph equipment(pantograph and thedome)on the aerodynamic performance ofhighspeed trains in crosswind,the aerodynamicproperties ofhighspeed train were measured and analyzed bywindtunne
5、ltest.The resultsshowthatwhentheyawangleislessthan15°,thetrainresistancecoefficientincreases withtheincreaseofyawangles;whentheyawangleis15°,dragcoefficientmeets theinflectionpoint,anditdeclinesaftertheinflectionpoint,and the absolutevalueofsideforce coefficien
6、tandtheliftcoefficientincrease with the increaseofthe yawangle.The impactofpantograph equipmenton head caris smaller,buttheabsolute value ofside force coefficientandthedragcoefficientofmiddle carincreasesignificantly.The dragcoefficientofthe lastcarreduces,andi
7、tssideforce coefficientincreasessignificantly.Theeffectofbathtub dome on the dragcoefficientofhighspeedtrain is strongerthan thatofbaffle dome ,while the effecton the liftcoefficientand theside force coefficientisweakerthan thatof“baffle” dome.Keywords:pantogra