Fundamental Study on the Effects of Local Schmidt Number of Lifted Flames

Abstract

Lifted flame stabilization mechanism has been explained with constant Schmidt number, and liftoff height of the flame is determined as a function of * / 2 (2Sc 1)/(Sc 1). In this research, local Schmidt number is suggested in order to measure edge flame propagation velocities directly, and edge flame propagation velocity can be obtained from the trend between lift-off height and nozzle flow rate. As a result, local Schmidt number becomes lower when nozzle flow rate is maximized or minimized, while local Schmidt number is maximized at mean of nozzle flow rate.