The burner consists of two vessels with a cruciform shape. The improvements are that flame-turbulence interactions are not influenced by the ignition source and the unwanted turbulence from walls and effects of buoyancy and pressure rise due to burning are minimized. Velocity profiles and visualization of turbulent flame fronts are obtained from laser Doppler velocimetry and high-speed laser sheet imaging, respectively. The results show that the turbulent burning velocity bonding is certain, the curvature of turbulent flame fronts is more complicated than generally assumed, and the vitality of turbulent premixed flames is surprising. The study contributes to a basic understanding of mechanism of turbulent premixed flame propagation, stretching and quenching.
Discussion is offered and area of future study identified.
This talk will first identify the milestones in the accomplishments in combustion science and technology, from the use of fires in prehistoric times to the use of lasers in modern times. He was a graduate student of Professor F. A. Williams and received his Ph.D. in engineering physics in 1973. Triple flames are localized structures that give the edges of diffusion flames the ability to propagate. Mathematically they are propagating fronts joining the ignited and extinct branches of the solution for a diffusion flame. Triple flames have been observed in well resolved numerical simulations of turbulent non-premixed combustion as well as in carefully controlled laboratory experiments.