In this study, we present the results of our experimental investigation of the behavior of methane and butane diffusion flames in counter-rotating opposed-jet flow. The variations of flame temperature and position as functions of the jet angular velocity ω are reported. Also, using the previously developed theory for non-reactive, inviscid flow field, the flame extinction data are correlated with the stretch rates experience by the flames. The calculated critical values of ω corresponding to the minimum fuel concentration at extinction are found to be in close agreement with the experimental observations. It is established that the Lewis number of the mixture has a pronounced effect on the behavior of diffusion flame within the recirculating secondary flow. The relevance of the results to the understanding of turbulent diffusion flames is discussed.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
- Physics and Astronomy(all)