管內(nèi)多相流的數(shù)值模擬與實(shí)驗(yàn)研究.pdf

1、同濟(jì)大學(xué)碩士學(xué)位論文管內(nèi)多相流的數(shù)值模擬與實(shí)驗(yàn)研究姓名：馬海寧申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：熱能工程指導(dǎo)教師：魏敦崧潘衛(wèi)國(guó)2003.1.1管內(nèi)多相流的數(shù)值模擬與實(shí)驗(yàn)研究摘要AbstractGas—solidmulti一_DhaseflowiscommonbothinnatureandinindustrialprocessesThecoal—airmixtureinprimaryairpipelinesinpowerplantsistypica

2、lofgas—solidmultiphaseflowanditisofgreatsignificancetostudyitsturbulentcharacteristicsforthesafeandeconomicoperatingoftheentirecombustionsystemSpecially，therearemanypipebendswithdifferentanglesandcurvatureinpowerplantsWh

3、engas’solidmixtureflowsthroughthisbends，theirflowparameterschangesgreatly，thiswillinfluencetheperformanceoftheequipmentsSoitisnecessarytostudythemultiphaseflowincurvedpipesInthispaperasimulationofthegas’solidmulti—phasef

4、lowinpipesbendswithdifferentanglesandcurvatureshasbeenperformedintheframeofEulerianapproachThekinetictheoryofgranularmediumhasbeenusedtodescribeinteractionswithintheparticlephaseGassolidmulti—phaseflowinapracticalprimary

5、airpipelinewiththreedifferentbendshasalsobeensimulatedSomefeaturesofthegas—solidmulti—phaseflowarecapturedandthefactorswhichinfluencetheflowfeaturesareanalyzedForthecloserelationbetweentheflowsinprimaryairpipesandinboile

6、rs，inthispaperasimulationofgassolidmultiphaseflowinatangentialfiringboilerwithacapacityof125MWhasalsobeenperformedThetrajectoriesofparticleswithdi媧rentdiametersareobtainedAfterthesimulationiscompleted，testsareperformedon

7、amulti—functiongas—solidflowlaboratorydevicetesearchintocharacteristicsofairflowsina90。bendsandgas—solidflowinastraightpipelineMicrowavesensorsandvirtualinstrumentsoftwareareemployedtoresearchthefeaturesofgassolidmultiph