已为您找到该学者15条结果 成果回收站
王秋旺
,-0001,():
-1年11月30日
-
63浏览
-
0点赞
-
0收藏
-
0分享
-
129下载
-
0
-
引用
-
60浏览
-
0点赞
-
0收藏
-
0分享
-
85下载
-
0
-
引用
王秋旺
,-0001,():
-1年11月30日
-
66浏览
-
0点赞
-
0收藏
-
0分享
-
205下载
-
0
-
引用
【期刊论文】An Experimental Study of Shell-and-Tube Heat Exchangers With Continuous Helical Baffles
王秋旺
,-0001,():
-1年11月30日
Twoshell-and-tubeheatexchangers(STHXs)usingcontinuoushelicalbafflesinsteadofsegmentalbafflesusedinconventionalSTHXswereproposed,designed,andtestedinthisstudy.ThetwoproposedSTHXshavethesametubebundlebutdifferentshellconfigura-tions.Theflowpatternintheshellsideoftheheatexchangerwithcontinuoushelicalbaffleswasforcedtoberotationalandhelicalduetothegeometryofthecontinuoushelicalbaffles,whichresultsinasignificantincreaseinheattransfercoefficientperunitpressuredropintheheatexchanger.Properlydesignedcontinuoushelicalbafflescanreducefoulingintheshellsideandpreventtheflow-inducedvibrationaswell.TheperformanceoftheproposedSTHXswasstudiedexperimentallyinthiswork.TheheattransfercoefficientandpressuredropinthenewSTHXswerecomparedwiththoseintheSTHXwithsegmentalbaffles.Theresultsindicatethattheuseofcontinuoushelicalbafflesresultsinnearly10%increaseinheattransfercoefficientcomparedwiththatofconventionalsegmentalbafflesforthesameshell-sidepressuredrop.Basedontheex-perimentaldata,thenondimensionalcorrelationsforheattransfercoefficientandpres-suredropweredevelopedfortheproposedcontinuoushelicalbaffleheatexchangerswithdifferentshellconfigurations,whichmightbeusefulforindustrialapplicationsandfur-therstudyofcontinuoushelicalbaffleheatexchangers.ThispaperalsopresentsasimpleandfeasiblemethodtofabricatecontinuoushelicalbafflesusedforSTHXs.
heat transfer,, pressure drop,, shell-and-tube heat exchanger,, continuous helical baffles
-
66浏览
-
0点赞
-
0收藏
-
0分享
-
5054下载
-
0
-
引用
王秋旺
,-0001,():
-1年11月30日
Three-dimensionalturbulentflowandheattransferinaninternallyfinnedtubewithablockedcore-tubehavebeennumericallystudiedbytherealizablek−εturbulencemodelwiththewall-functionmethod.Thenumericalmethodisvalidatedbycomparingthecalculatedresultswithexperimentaldata.Therangeofratioofblockedcore-tubeoutsidediametertoouter-tubeinsidediameter(d0/Di)isfrom0.25to0.75.Thecomputationalresultsdemonstratedthatthereexistsanoptimalratioof(d0/Di)underbothidenticalmassflowrateandidenticalpressuredrop.Theoptimalratioof(d0/Di),whichisreducedwiththeincreaseofmassflowrate,isapproximately0.5to0.625atgivenmassflowrateforbothconstantwalltemperatureanduniformwallheatflux.Theoptimalratioof(d0/Di)atagivenpressuredropisfrom0.44to0.50,whichisalsoslightlyreducedwiththeincreaseofpressuredrop.Furthermore,theoptimalratioof(d0/Di)isnotsensitivetothenumberofcross-sectionwavyfinsofaninternallylongitudinalfinnedtube,intherangeofafinwavenumberof15–25.
Longitudinal Finned Tube,, optimal diameter ratio
-
56浏览
-
0点赞
-
0收藏
-
0分享
-
305下载
-
0
-
引用