The Turbulent Jet Diffusion Flame in a Co-flowing Stream—Some Velocity Measurements

Abstract

Laser-Doppler measurements of mean velocity, axial and radial components of turbulence and Reynolds shear stress have been made on a turbulent diffusion flame formed by a jet of hydrogen burning in a co-flowing stream of air at an initial velocity ratio of 10 to 1. Results are found to be similar to those for isothermal and heated air jets in co-flowing streams except that there appears to be some suppression of turbulence on the centreline near the hottest part of the flame. The technique used involves some small residual effect of seeding bias and this has been thoroughly analysed and estimates made.