简介：Theworldhasbecomehighlydependentonreliablerefrigerationtechnology.Withoutit,ourfoodsupplywouldbestillseasonalandlimitedtolocallyproducednonperishableitems;comfortablelivingconditionsviaclimatecontrolwouldbeimpossible;andcertainmedicaladvancements,e.g.MRIdiagnostics,organtransplantation,organandtissuecryo-storage,andcryo-surgerywouldbeimpossible.

简介：Asoneofthemostimportantdevelopmentsinaircoolingtechnologyforhotpartsoftheaero-engine,filmcoolingtechnologyhasbeenwidelyused.Filmcoolingholestructureexistsmainlyinareasthathavehightemperature,unevencoolingeffectivenessissueswheninactualuse.Thefirststageturbinevanesoftheaero-engineconsumethelargestportionofcoolingair,therebytheresearchonreducingtheamountofcoolingairhasthegreatestpotential.Anewsteppedslotfilmcoolingvanewithahighcoolingeffectivenessandahighcoolinguniformitywasresearchedinitially.Throughnumericalmethods,theaffectingfactorsofthecoolingeffectivenessofavanewiththesteppedslotfilmcoolingstructurewereresearched.Thispaperfocusesonthecoolingeffectivenessandthepressurelossindifferentblowingratioconditions,thenthemostreasonableandscientificstructureparametercanbeobtainedbyanalyzingtheresults.Theresultsshowthat1.0mmistheoptimumslotwidthand10.0isthemostreasonableblowingratio.Underthiscondition,thevaneachievedthebestcoolingresultandthehighestcoolingeffectiveness,andalsoretainedalowpressureloss.

简介：随煤气的汽轮机的入口温度的增加，由使用常规方法的好处是可能的接近他们的限制。因此，学习为超过这些当前的限制使方法凉下来的新奇电影是必要的。基于热转移改进的理论，由使溪流凉下来与化学反应使方法凉下来的一部电影被建议。以便测试建议方法的可行性，数字模拟被进行了。有30度洞的经典的扁平的板结构被用于模拟。在现在的学习，在与使有效性凉下来的电影上的化学反应的关系的参数的效果例如化学的热水池，卷变化，和反应率，数字地被调查。冷却的常规电影也为比较被计算。电影冷却有效性由于化学反应显然被改进的结果表演，和反应热和冷却的反应率流在电影有效性上有重要效果。然而，卷变化的效果能被忽略。

简介：

简介：

简介：Heattransferinthethrustchamberisofgreatimportanceinthedesignofliquidpropellantrocketengines.Regenerativecoolingisandadvancedmethodwhichcanensurenotonlytheproperrunningbutalsohigherperformanceofarocketengine.Thetheoreticalmodeliscomplicated,itrelatestofluidbynamics,heattransfer,combustion.etc…,Inthispaper,aregenerativecoolingmodelispresented.Effectssuchasradiation,heattransfertoenvironment,variablethermalpropertiesandcokingareincludedinthemodel.Thismodelcanbeappliedtoallkindsofliquidpropellantrocketenginesaswellassimilarconstructions.Themodularizedcomputercodeiscompletedinthework.

简介：Thecoolingandheatingloaddistributionoflargeareaair-conditionedroomsuchas'open'offices,shoppingmallsandwaitingroomsisusuallyassumedtobeeveninairconditioningsystemdesign.However,itisnotthecaseinreality,andalowefficientairconditioningsystemresultsfromthisassumption.AsimulationandanalysisofthecoolingloaddistributionofanofficebuildinginHongKongwithTRANSYSsoftwareisprovidedinthispaper.Atypicalofficeisdividedinto13zonesforsimulation,includingexternalzone,medialzoneandinternalzoneinthenorth,thesouth,theeastandthewestrespectivelyandacentralzone,insteadof4directionalzone.Theresultshowsthereismuchcoolingloaddifferencebetweeneachzone,andmoreattentionshouldbepaidtounevenindoorcoolingandheatingloaddistributiontofurtherguidethedesign.

简介：

简介：Thermalhydraulicanalysiswasperformedforthe2004ITERblanketdesign,whichwasbasedonthefabricationmethodsofforging,drillingandwelding.Resultsshowthat,intheoriginaldesign,theflowdistributioninradialholeswasfarfromuniformbecausedifferentflowdriverswereusedintheradialholes.Improvementoftheflowdriverisproposedinthisstudy.Withtheoptimizationoftheflowdrivers,itisclearlyshownthatthetotalpressuredropdecreasesandabettervelocitydistributioninradialholesisobtained.Themoreuniformheattransfercoefficientamongtheradialholesisbeneficialforreducingthermalstress.

简介：1.IntroductionNorthwest-andNorth-Chinaarerichincoalresources,buttheclimateoftheseregionsissemi-aridandshortofwaterresources.Forthisreason,therecirculatingwatersupplysystemsarepre-dominantlyutilizedinfossilpowerplants.Thenaturaldraftcoolingtowersaregenerallyselectedfortheserecirculatingsystems.Ac-cordingtostatisticsabout50%ofthethermalpowerplantsinChinaareequippedwithnaturaldraftcoolingtowers.Thecoolingtowerswithcast-in-placereinforcedconcretehyperboloidalshellarepreferablyadoptedinChina,becauseofthenot-too-severeclimateinwinter,thelowearthquakeintensitiesand

简介：Manyfactorssuchasouterdiameter,hubratio,bladenumbers,shapeandstaggerangleaffecttheperformanceofsmallcoolingfans.AsmallcoolingfanwassimulatedusingCFDsoftwareforthreebladestaggerangles(30.5°,37.5°,44.5°)andobtainedtheinternalflowfieldandthestaticcharacteristics.Researchindicatedthatthestaggeranglehasanobviouseffectonthestaticcharacteristicsofafan.Forflowratesbelow0.0104m3/s,totalpressureisthegreatestwhenthestaggerangleis37.5°;flowrateshigherthan0.0104m3/s,thetotalpressureisgreatestwhenthestaggerangleis44.5°Forthesameflowrates,thevelocityatinletofpressuresurfaceincreaseswithincreasingstaggerangle,butthechangeofvelocityonthesuctionsurfaceisverysmall.Foronemodel,vorticesandthespeedofrevolutionsurfacesdecreasewithtipclearanceincreasing.Butforotherthreemodels,increasingthestaggerangle,thevortexintensityandspeedofrevolutionsurfacesatsameheighttipclearanceincreases,simultaneously,thepositionofvortexoffsetfromthetopoftherotorbladetothesuctionsurface.

简介：这研究的目的是评估各种各样的格子的潜力令人满意地模仿一部冷却电影的发展，用考虑完整的几何学的acoupled计算。30度的单个排的详细计算在一个扁平的盘子上绕行洞为吹0.764，1.01和1.54的比率被介绍。模拟结果与试验性的数据被作比较很好。二层的模型给了更精确的结果，但是比标准墙工作的消费了更计算的时间。有有y+的适当的值的墙函数的k-蔚骚乱模型对实际使用合适。结果为精确地在冷却电影以内描述热转移的影响显示出conjugate计算的重要性。关键词拍摄冷却-结合热转移-刮的比率CLC数字TK124

简介：

简介：我们在场在intracavity冷却并且外部洞为光制冷冷却之间的比较。结果证明intracavity计划在低光密度(0.01)被比较喜欢。我们能在实验为不同案例选择合适的计划。而且在一样的条件下面，拿做Yb3+的ZBLAN(ZrF4-BaF2-LaF3-AlF3-NaF)作为一个例子拍摄，二个计划的冷却过程被获得。计算结果证明冷却的intracavity将为一件薄电影样品完成更大的温度落下。最后，二极管激光可以为简短讨论的intracavity模型成为一个候选人。[从作者抽象]

简介：Filmcoolingisintroductionofasecondaryfluid(coolantorinjectedfluid)atoneormorediscretelocationsalongasurfaceexposedtoahightemperatureenvironmenttoprotectthatsurfacenotonlyintheimmediateregionofinjectionbutalsodownstreamregion.Thispapernumericallyinvestigatedthefilmcoolingeffectivenessontwotypesofholegeometrieswhicharecut-shapedholeandantivortexhole.The3Dcomputationalgeometriesaremodeledwithasingle30degangledholeonaflatsurface.Thedifferentblowingratiosof0.5,1,1.5,2,2.5,3,3.5,4,4.5,5andk-Epsilonturbulencemodelareusedinthisstudy.Atwodimensionaldistributionoffilmcoolingeffectivenessinthedownstreamregionofthecoolingholeisperformed.AcomparisonofspanwiseaveragedeffectivenessisalsoperformedinthefieldstartsfromcenterpointofholetoX/D=30.

简介：Ultrafastcoolingisanewtechnologywhichusedtocontrolthehot-rollingstripcoolinginrecentyearsontheinternationaldeveloped.Ifsuitablycooperatedwithanumberofothernewcontrolledrollingtechnologies,canachievefastandaccuratetemperaturecontrolinthehot-rolledstripproductionprocesstoobtaincorrespondingtransformationmicrostructureandidealmechanicalproperties.Thisarticledescribesthetechnicalprincipleandlayoutofultrafastcoolinginhot-rolledaswellasapplicationprofilesinthemajorironandsteelenterpriseinChinaandabroad.Carriedoutthelayoutofultrafastcoolinganalysisontheadaptabilityofsteelthatinstallbetweenthefinishingmillandlaminarcooling,onthisbasis,proposedtheuseofultrafastcoolingtechnologyproposals.

简介：Thispaperisconcernedwithwatersavingforwater-loopcoolingtowersysteminpowerplants.Anewlydevelopedwatersavingdeviceofswirlingflowispresented.Thekeypointisthatthenewwatersavingdevicemakesthesteamswirlupalongthedevicewallratherthanengenderlaminarflowinacorrugatedplate.Thecorrugatedplatedevicecansaveapproximately10percentofthetotallostwater.Incontrasttothescalemodelofcorrugatedplatewatersavingdevice,experimentalanalyseshavedemonstr...

简介：

简介：

简介：ThispaperdetailstheresultsofajointprojectbetweenRolls-RoyceDeutschland(RRD)andtheNorthwesternPolytechnicalUniversityofChina(NWPU).Theobjectiveoftheprojectwasthedeterminationoftheinfluenceoftabulatorsinturbinebladecoolingpassagesonfilmholedischargecoefficients(Cdcoefficients).Alarge-scaleplexiglasmodelwasusedbytheNWPUtomeasuretheturbulatorinfluenceonCdcoefficientsforawiderangeofdifferentgeometricalparameters,Reynoldsnumbersandcoolingflowofftakeratios.RRDspecifiedthecomprehensivetestmatrixandanalysedthetestdata.TheCFDcodeFLUENTwasusedbyRRDfornumericalsimulationofthetestcaseswiththemainobjectivetosupporttheinterpretationofobservedtrends.Both,experimentalandnumericalresultswillbepresentedinthispaperforaselectionoftestconfigurations.