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时间:2020-03-22
《阻力精确分解的方法研究与数值模拟.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、½47þ½2ÿ!"1SUVVol.47No.22017#3$AeronauticalComputingTechniqueMar.2017x(<=:K0VY12s*+,-èè,ÂÃ,éê(!#-MLT#$Yj78()k,SLLT710068)34:Ä=N´±7±y=Vg3¤2=ZM2=,Õ%_A=ó¬Vg?@:¤2=@ZM2=@,g6è&nqZÕ8=FVy=Vg3=ZÅ=,iIÞ®VYFVy=Vg3e、Æ、Ç¡=ZIJÈU=。,6RAE2822Î@、M67ÎZÉx<ïKeIJKL,p=Vg?@N¼¬Á,6yÊá?@e
2、=VgËNÒ=¥?。45lmno,M2=@'àÌN=(,Íqøòe=VÍZ¨¯)8:;¤2=ZM2=:;'rstÎÏ=âÐ,ÑÒòÓÔAIJÈU=,M2=@N:;lm®y¤2=@ͤJ。567:=Vg?@;¤2=;M2=;IJÈU=89:;<:V212.1=>?@A:A=BC<:1671?654X(2017)02?0029?04MethodStudyandNumericalSimulationofDragFinerDecompositionGAOFei?fei,HAOHai?bing,YANHong(Xi′anAe
3、ronauticsComputingTechniqueResearchInstitute,AVIC,Xi′an710068,China)Abstract:Dragisdecomposedintonear?fielddragandmid?fielddrag,accordingtothephysicalmechanismofdragproduction.Near?fielddragmethodandmid?fielddragmethodareestablishedfully.Thenear?fielddragmetho
4、dcandecomposetotaldragintodragcomponentssuchaspressuredragandfrictiondrag.Thismid?fielddragmethodcandecomposetotaldragintodragcomponentssuchaswave,profile,inducedandspuriousdrag.Themethodsarevalidatedeffectivelyandcompareddetailedly,dependingonRAE2822,M6andwide
5、?bodycivilaircraft.Theresultindicatesthatthedragcomponentscanbeshowedclearlywiththemid?fielddragmethod.Therefore,themid?fielddragmethodisbenefitforunderstandingofdraggenerationanddragreduction.Inaddition,thenear?fielddragandthemid?fielddragcansustainequilibrium
6、withthetwomethods.Becausethemid?fielddragmethodcaneliminatenumericalerroreffectively,theresultgeneratedbythismethodfitsbettertotheexperimentresultsthanthenear?fielddragmethod.Keywords:dragdecompositionmethod;near?fielddrag;mid?fielddrag;spuriousdragDEï¹Þß5CFD1
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