Abstract
To investigate propagation of methane-air premixed flame in constant volume vessel, constant volume combustion chamber which can control turbulent characteristic and is applied by optical measurement has been developed and time-resolved measurements of CH chemiluminescence have been conducted. When flame front approaches near wall region, CH chemiluminescence vanishes and flame quenching occurs. Distance between flame front and wall when flame quenching occurs (quenching distance) is smaller in stoicheiometric condition than lean condition. Displacement speed of flame front above the ignition point decreases gradually as flame front approaches the wall, and corresponds to laminar burning velocity approximately just before flame quenching.
