简介：为了分析在自然通风状态下阳台对公寓室内气流组织及房间换气次数的影响机理,对带阳台公寓和无阳台公寓分别进行建模,并利用ANSYS仿真软件对两种模型进行模拟,得出以下结论：阳台对来流空气有一定的阻碍作用,带阳台工况下的换气次数小于无阳台工况下的换气次数;带阳台和无阳台两种工况下,随着气流吹入角度的增大,阳台对换气次数的影响程度先增大后减小;带阳台工况下来流空气在阳台内形成涡旋,涡旋改变了前窗空气流向。

简介：Inthepresentwork,computationalsimulationswasmadeusingANSYSCFXtopredicttheimprovementsinfilmcoolingperformancewithdualtrench.Dual-trenchconfigurationconsistsoftwotrenchestogether,onewidertrenchandtheotherisnarrowtrenchthatextrudedfromthewiderone.Severalblowingratiosintherange(0.5:5)wereinvestigated.Thepitch-to-diameterratioof2.775isused.Byusingthedualtrenchconfiguration,thecoolantjetimpactedthetrenchwalltwotimesallowingincreasingthespreadingofcoolantlaterallyinthetrench,reducingjetvelocityandjetcompletelycoveredonthesurface.Theresultsindicatethatthisconfigurationincreasedadiabaticeffectivenessasblowingratioincreased.Thespatiallyaveragedadiabaticeffectivenessreached57.6%foratM=2.Noobservedfilmblow-offatallblowingratios.Theadiabaticfilmeffectivenessofdualtrenchcaseoutperformedthenarrowtrenchcase,laidbackfan-shapedhole,fan-shapedholeandcylinderholeatdifferentblowingratios.