甲烷富氧分段燃燒NOx排放特性的數(shù)值模擬.pdf

1、重慶大學(xué)碩士學(xué)位論文甲烷富氧分段燃燒NOx排放特性的數(shù)值模擬姓名：王鋒申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：供熱、供燃?xì)狻⑼L(fēng)及空調(diào)工程指導(dǎo)教師：彭世尼20091125英文摘要ABSTRACTOxygenenrichedcombustiontechnologiescallreducefuel’Signitonpointandaccelerateflamepropagationspeed，andmakethelesscombustiblefuel’Sc

2、ombustionreactionmoresmoothly；ThetemperatureofflameiSincreasedbecauseofthefinalfluegasvolumeislessthaneVel，theconcentrationofsomecomponentsinfluegaswhichpossessstrongradiationishigherthaneVer，whichmaketheflameheattransfe

3、rcapacityenhanced，andenhancethethermalefficiencyofcombustionequipmentatthesametimeTherefore，oxygen—enrichedcombustiontechnologyisanenergy—efficientcombustiontechnologyButtheemissionofthermalNOxinceasessurgelyduetotheflue

4、gas’StemperatureandthePartialpressureofoxygeninairincreased，wemustfacetotheproblemwhenwewanttousetheoxygen—enrichedcombustiontechnologyThepaperresearchscombustioncharacteristicandNOxemissioncharacteristicofmethane’Soxyge

5、nenrichedandstagedcombustionusingFLUENTastools，andchoosenumericalsimulationasreserchmethodFirstofall，thepaperdesignsasuitablehighvelocityburneraccodingtelatedliterature’Sdesignmethod，andsetthehighvelocityburner’Splay’sic

6、almodelinFLUENT’Spreprocessingtool，inaddition，themodel’SmeshgenerationandboundaryconditionisalsonecessaryInordertoknowmoreaboutthefuelandair’Sflowcharacteristicandmixingcharacteristicinbumerthepapermakesacoolmodelfortheb

7、urnerandcontrastwiththermalmodel’SresultThepapermakesathermalmodelfortheburner’Soxygen—enrichedcombustionaftercompletingtheuponworksThemodelresultasfllowing：whentheconcentrationofoxygeninairincreased，thecombustionreactio

8、nspeedincreased，andtheflameisshorterthaneverandthehightemperatureareainflamedownstreamalsoincreased，andtheintensityofcombustionandflametemperatureiSalsoincreased，whichinevitablyleadtheemissionofNOxinceasessurgelywhenthec

9、ocentrationofoxygeninairisabout30％，theemissionofNOxisfourtimesthanthecommonair’ScombustionFinallythepapersetsanannularchannelwhichisusededtosupplysecond砒andthechanneladjacentstotheoriginalburner’swall，andmakesasimulation