dataobtainedfromthegraphsindicatesgradualdecreaseofflameheightandgradualincreaseofflameanglewiththegradualincreaseinco2content.basedonthedataobtained,therearenosuddenchangesinflameproperties.moreover, itcanbeconcludedfromthisstudythatcarbondioxideactsasaninhibitorinthecombustionprocess.inhibitoryeffectofcarbondioxideincreasion withincreasinglevelsofco2inmethanethatcausedchangesinthecharacteristicsofthefireburning.flameangleappearstoincreasewithincrease go2levelswhiletheflameheightdecreasesnearlyinlinearmanner.thiscanbeseenintheformationofflameanglewhichtendstobewiderathighco2concentrations,but lowerthe flame height obtained。
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