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:在调研国内外玻璃态复合膜技术和加油站油气回收工艺的基础上,参与研发了全氟AF玻璃态材料复合膜,参照环氧外壳卷式组件,采用自行设计的测试方案和测试平台,对该复合膜与德国GKSS玻璃态膜进行了分离性能对比测试。结果表明:该膜对于小处理量、低浓度(入口油气体积浓度仅为10%~30%的情况下)混合气体的处理效果可满足加油站排放指标要求;GKSS膜组件对处理量在2~7m^3/h、入口体积浓度小于20%的混合气体,在入口压力变化较大的情况下处理后的排放气体基本稳定达标。研究为油气截留型玻璃态高分子复合膜在加油站油气回收中的推广应用提供了技术支持。