The extinction characteristics of double premixed flames of methane in counterflow of two cylindrical jets which undergo rigid-body rotation are investigated. Using laser doppler velocimetry, the axial, radial and circumferential velocity profiles are measured when jets with equal angular velocity rotate in the opposite directions. It is found that two symmetric lean methane flames which are merged and near extinction, will subsequently separate again upon the rotation of the jet streams. Furthermore, as the angular velocity is increased, the fuel concentration at extinction is found to first decrease to a minimum value and increase thereafter.
|Original language||English (US)|
|Journal||Western States Section, Combustion Institute (Paper)|
|State||Published - Dec 1 1985|
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