1、山東大學碩士學位論文CFB鍋爐螺旋槽管空氣預熱器強化傳熱與阻力特性研究姓名：王志鵬申請學位級別：碩士專業(yè)：工程熱物理指導教師：潘繼紅20030520——堂查杰鱟堡主鱟壁簍塞AbstractTheCircuiatingFluidizedBedriser(CFB)isanadvancedhighefficiencyandcleancombustiontechnologyThehorizontallinearrangementairpremh

2、eateriswidelyusedinCFBboilers，whichalelowerheattransfercoefficientandargerphysicalvolume。WiththeincreasingapplicationofCFBtechnologies，theproblemsarebecomingmoreacuteTheapplieationofthespirallycorrugatedtubeisaneffective

3、approachtosolvetheproblemInthispaperthepressuredropsandheattransfercoefficientsofthespirallycorrugatedtubeswereinvestigatedthroughtheoreticalanalysisandexperimentsSomedata，whichcanbeusedinthedesignandoperationofairprehea

4、terforCFBboilers，areobtainedOnthebasisofboundarytheoriesandperturbingflowcharacteristicsof2Dfoughsurface，theheattransfcrenhancementmechanismsandfrictioncharacteristicsofbothinsideandoutsideofspirallycorrugatedtubeweredis

5、cussedQualitativeanalysisofgeometricalparametersofthetubeonheattransferandflowfrictioncharacteristicswasalsogiveninthePaporAnexperimentalapparatushasbeendesignedandestablishedinthispaperExperimentshavebeendonetoinvestiga

6、teflowfrictionandheattransferofthespirallycorrugatedtubewithvariousgeometricalparametersThenon—dimensionalequationsofbothoutsideandinsideheattransferandflowfrictioncoefficientsforthespirallycorrugatedtubewereobtainedAnan

7、alysisontheeffectsofthegroovedepthandpitchontheinsideandoutsideflowfrictionandheattransferwasperformed，飄legeometricalparametersofspirallycorrugatedgrooveshaveobviouseffectsonflowfrictionandheattransfercoefficientsinsidet

8、hetube，andlittleeffectsononesoutsidethetube譬heflow蠹lotionaridhe氌ttransfertareinsidetHbencreasedwiththeincreaseofgroovedepthanddecreasedwiththeincreaseofgroovepitch弧eflowfrictionandheattransferrateoutsidetubedecreasedwith

9、theincreaseofgroovedepthandincreasedwiththeincreaseofgroovepitchOnthebasisofheattransferenhancementmechanismsofthespirallycorrugatedtubes，ananalysisontheuncertaintiesoftheRenumberintheinsidetubeheattransferexperimentaIco