欢迎来到天天文库
浏览记录
ID:52006772
大小:490.47 KB
页数:7页
时间:2020-03-21
《大型回流边界层风洞的气动与结构设计.pdf》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、第28卷第2期实验流体力学Vo1.28。No.22014年O4月JournalofExperimentsinFluidMechanicsApr.,2014文章编号:1672—9897(2014)02—0059—07doi:10.11729/syhlx2012O179大型回流边界层风洞的气动与结构设计余世策,蒋建群,楼文娟,孙炳楠(浙江大学建筑工程学院,杭州310058)摘要:大型边界层风洞是开展风工程研究的必备装备。以浙江大学Zfbl边界层风洞的研制为背景,详细介绍了大型回流边界层风洞气动设计和立式结构设计中的关键问题,在风洞气动设计时采用了收缩比为4
2、:1的单回路单试验段气动轮廓,在试验段中设置了0.22。的当量扩散角,对拐角导流片外形作了特殊处理,并采用钢结构与混凝土结构相结合的立式结构。流场校验结果表明,大型回流边界层风洞的气动与结构设计能满足设计要求,某些指标甚至达到航空风洞的标准,在试验段中设置扩散角有利于降低轴向静压梯度,立式结构设计对提高试验段气流的水平均匀性有一定的作用,可为今后类似风洞的研制提供参考。关键词:边界层风洞;气动设计;立式结构设计;流场校测中图分类号:V2l1.74文献标识码:AAerodynamicandstructuraldesignoflargerecirculat
3、ingboundary—layerwindtunnelYuShice,JiangJianqun,LouWenjuan,SunBingnan(CollegeofCivilEngineeringandArchitecture,ZhejiangUniversity,Hangzhou310058,China)Abstract:Largeboundary—layerwindtunnelisnecessaryequipmentforwindengineeringre—search.InthebackgroundofthedevelopmentofZhejiangU
4、niversityZD一1boundarylayerwindtunnel,thekevtechnicaIproblemsinthedesignoftheaerodynamicandverticalstructureofthelargerecircularingboundarylayerwindtunnelareintroducedindetail.TestsectionofZD一1windtunnelisdesignedas4mwidthand3mheight,themaximumwindspeedisdesignedas55m/s,andthetur
5、bu1enceintensityisdesignedasnothigherthan0.5.Withthecontractionratioo±4:1。sing1etestsectionandsingleloopaerodynamicprofileareusedinaerodynamicdesign,e—auivalentdiffusionangleof0.22。isarrangedinthetestsection,andtheshapeo±cornervane1streatedspecially.Thecombinationofstee1structur
6、eandconcretestructureISusedintheverticalwindtunnelstructuredesign.Theresultsofflowfieldcalibrationshowthatthemaximumwindspeedofwindtunnelreaches55m/s,themaximumenergyratioreaches2.0,thehydrodynamicstabilitvcdefficlentinmastertestareaforwindspeedof40m/sislessthan0.5,themaximumaxi
7、a1staticDressuregradientis0.0044,andthemaximumturbulenceintensityis0.47.Itisshowedthatalltheindexesmeetthedesignrequirements,andsomeindicatorsreachthestandardofaviationwindtunne1.ItisworthstressingthatsettingaxiaIdiffusionangleinthetestsectioncanreduceaxialstaticpressuregradient
8、,andthedynamicpressurenonuniformitycoetficientc
此文档下载收益归作者所有