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.
简介:此期专辑向您展示六大摩托车品牌的旗舰,它们分别是:宝马R1200C,哈雷·戴维森IDSONSPROTSTER883,铃木GSXl400,雅马哈2002YZF—R1、川崎NINJA流不息ZX-12R,本田SHADOW400。它们虽不是摩坛新星,但是他们的外形和性能是这六大品牌的旗舰。这里不仅有严谨、简洁的德国文化的产物,有人类古文明璀璨光环的印第安文化的痕迹,更有被丰厚东方文明泽被的精品。这些风格各异、大器卓越、霸气横溢的摩托车,真正做到了“车”不惊人誓不休,不能不叹服于工业美给人带来的至上感觉。