94环境技术/EnvironmentalTechnology技术专栏echnicalColumnT摘要:本文研究了新型变截面叉排直肋结构的流阻与换热性能。采用数值模拟技术研究了变截面及另外两组对比组,并建立了雷诺数与努塞尔数、进出口压差、传热因子j和摩擦因子f之间的关系图。最终从数值模拟的结果可以计算出,在雷诺数为600时,变截面肋片的传热因子j比普通叉排直肋高约23.5%,比翼型叉排直肋也高出约14.4%;同时普通叉排直肋的摩擦因子f比变截面叉排直肋高约197.7%,翼型叉排直肋也比变截面叉排直肋高约31.2%。相对于普通叉排直肋肋片,翼型叉排直肋和变截面叉排直肋能在有效提高散热效率的情况下,大幅减小压降,并且变截面叉排直肋的换热性能比翼型叉排直肋更好,压降也更低。在航空飞机等需要高换热性能和低压降时,可以优先使用变截面叉排直肋。关键词:电子器件;强迫风冷;变截面叉排直肋;换热性能;压降;数值模拟中图分类号:TK414文献标识码:A文章编号:1004-7204(2023)02-0094-07一种新型叉排直肋表面的流阻及换热性能研究ResearchonThermalandHydraculicPerformanceofANewAirDynamicalVariableCross-SectionRectangularOffsetStripFin王康1,熊长武2,杜平安1,胡家渝2(1.电子科技大学,成都610097;2.西南电子技术研究所,成都610036)WANGKang1,XIONGChang-wu2,DUPing-an1,HUJia-yu2(1.UniversityofElectronicScienceandTechnologyofChina,Chengdu610097;2.SouthwestChinaInstituteofElectronicTechnology,Chengdu610036)Abstract:Toexploretheflowresistanceandheattransferperformanceofthenewvariablecross-sectionrectangularoffsetstripfinstructure.Thenewvariablecross-sectionrectangularoffsetstripfinandtwoothercomparisongroupswerestudiedbynumericalsimulationtechnology,andtherelationshipbetweenReynoldsnumberandNusseltnumber,inletandoutletpressuredifference,heattransferfactorjandfrictionfactorfwasestablished.TheexperimentalresultsshowthatwhentheReynoldsnumberis600,theheattransferfactorjofvariablecross-sectionfinsisabout23.5%higherthanthatofordinaryrectangularoffsetstripfins,andabout14.4%higherthanthatofairfoilrectangularoffsetstripfins.Atthesametime,thefrictionfactorfofordinaryrectangularoffsetstripfinsisabout197.7%higherthanthatofvariablecross-sectionfins,andtheheightofairfoilrectangular...