Strain Rates and OH Layer Characteristics in Stabilization Region for Turbulent Non-premixed Jet Flames Close to Blowoff

동축공기 난류제트확산화염의 화염날림 근처에서의 변형률 및 OH 특성

Simultaneous measurements of planar laser-induced fluorescence (PLIF) of OH radicals and particle image velocimetry (PIV) were used to investigate the strain rates and OH structure characteristics of turbulent syngas non-premixed jet flames close to blowoff. Mean values of the maximum principal strain rate on OH layer decreases with the axial distance, and its standard deviation is significantly large upstream. Strain rate on stabilization region of the stable flame is only about a half of that of the flame near blowoff.