弯曲多孔壁不同倾斜角气膜孔整体气膜冷却效率研究

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1、Seediscussions,stats,andauthorprofilesforthispublicationat:https://www.researchgate.net/publication/293359785StudyofoverallcoolingeffectivenessofdiscreteholeswithdifferentanglestoconcavewallArticle·February2007CITATIONSREADS3144authors,including:MengmengZhaoChenghuiZhangUniversityofSouthernQueensla

2、nd ShandongUniversity13PUBLICATIONS13CITATIONS499PUBLICATIONS2,774CITATIONSSEEPROFILESEEPROFILEYuzhenLinBeihangUniversity(BUAA)146PUBLICATIONS384CITATIONSSEEPROFILESomeoftheauthorsofthispublicationarealsoworkingontheserelatedprojects:Researchonmodelling,stateestimation,integratedtests,andintelligen

3、temulationforpowerbatteriesViewprojectbatteryequalizationViewprojectAllcontentfollowingthispagewasuploadedbyMengmengZhaoon25September2018.Theuserhasrequestedenhancementofthedownloadedfile.第22卷第2期航空动力学报Vol.22No.22007年2月JournalofAerospacePowerFeb.2007文章编号:100028055(2007)0220210206弯曲多孔壁不同倾斜角气膜孔整体气膜冷却效

4、率研究赵梦梦,张弛,林宇震,刘高恩(北京航空航天大学能源与动力工程学院航空发动机气动热力重点实验室,北京100083)摘要:对弯曲多孔壁气膜冷却整体冷却效率进行了深入研究.弯曲多孔壁由等曲率凹壁面多孔壁实验板来模拟,实验研究了相同排列方式下2种不同小孔倾角方案整体气膜冷却效率,分析了弯曲通道曲率对冷却效率的影响,得到了沿流程的展向平均冷却效率及x/d=21.8和x/d=65.3处展向冷却效率分布.研究结果表明,吹风比是影响凹壁面小孔气膜冷却效率的关键因素;随着吹风比的增大,2种孔倾角冷却效率的差异变小;主流通道中气体的流动规律对冷却效率有较大影响.关键词:航空、航天推进系统;航空发动机;回流

5、燃烧室;弯曲通道;冷却效率中图分类号:V23111文献标识码:AStudyofoverallcoolingeffectivenessofdiscreteholeswithdifferentanglestoconcavewallZHAOMeng2meng,ZHANGChi,LINYu2zhen,LIUGao2en(NationalKeyLaboratoryonAero2Engines,SchoolofJetPropulsion,BeijingUniversityofAeronauticsandAstronautics,Beijing100083,China)Abstract:Overallco

6、olingeffectivenessofcurvedwallswithdiscreteangledholeshasbeenstudiedinthepaperthroughapproximatesimulationemployingexperimentalconcavewallswithaconstantcurvature,whichwereappliedintensivelyinthecurvedductfortur2boshaftenginereverse2flowcombustor.Anexperimentbyheattransfermethodfortheover2allcooling

7、effectivenesswasperformedandtheeffectofblowingratioontheoverallspanwiseaveragedcoolingeffectivenesswasobtained.Theexperimentalresultshowsanimprovedo2verallcoolingperformanceforthecurvedwallandtheinsignifica