EffectofaddingH2onlaminarcombustioncharacteristicsofbiomassgasWANGFa-hui1，CHENYa-ning1，ZHANGDan2，WENXiao-ping1，ZHANGAn-chao1(1SchoolofMechanicalandPowerEngineering，HenanPolytechnicUniversity，Jiaozuo454000，Henan，China;2SchoolofCivilEngineering，HenanPolytechnicUniversity，Jiaozuo454000，Henan，China)Abstract:TostudytheeffectofH2onlaminarcombustioncharacteristicsofbiomassgas，hydrogen-dopedbiomassgas/aircombustionexperimentswerecarriedoutwithvolumefractions7.15%－33.15%hydrogenatanequivalentratioequalto0.6－1.4.Theseexperimentswereinaconstantvolumeburningbombwithaninnerdiameterandlengthof200mmandtheignitionpositionwasinthecenter．Ignitionelectrodesweremodifiedbywelding0.45mmtungstenwirewithtwoceramicsingle-stageignitionrods，whichisthemaincomponentofahigh-energypulseelectronicigniter．Premixedgaswasobtainedbypartialpressuremethodandkeptstillfor10minutes，andtriggerthehigh-speedcameraasplitsecondbeforeignitiontoobtainpicturesoftheflamepropagationprocess．AnalyzedthechangesofchemicalreactionpathsataddinghydrogenthroughChemkin-Pro．TheresultsshowthattheadditionofH2promotesthelaminarburningvelocityofbiomassgas/air，leancombustionsidesmoothgrowthwhilerichsidesignificantly，andtheinstabilityoftheflamewiththeincreaseofH2volumefractionincreased;Theincreaseofmainfreeradicalsintheflamestructureismainchemicalkineticsreasonforthegrowthinlaminarburningvelocity;TheoxidationofCH4determinesthespeedoftheoverallcombustionreaction，theincreaseofH2mainlypromotestheoxidationofCH4andCOinthreeroutes．OneistheprocessofpromotingtheoxidationofCOintoCO2，whichbelongstotheterminationreaction．TheotheristopromotetheoxidationprocessoftheCHgroup，andtheCHgroupandO2togethertoformtheHCOgroup．ThethirdisthefurtheroxidationoftheHCOgroupfromHO2，anditisalsothemostimportantprocess;ThefrequentparticipationofO2intheoxidationpathisthereasonforthesignificantincreaseinthelaminarburningvelocityonthefuel-richside．Keywords:environmentalengineering;biomassgas;combustioncharacteristic;reactionpath文章...
