Buoyant unstable behavior in initially spherical lean hydrogen-air premixed flames within a center-ignited combustion vessel have been studied experimentally under a wide range of pressures (including reduced, normal, and elevated pressures). The experimental observations show that the flame front of lean hydrogen-air premixed flames will not give rise to the phenomenon of cellular instability ...

Abstract The ignition sensitivity and flame propagation of titanium dust cloud were investigated to evaluate the risk combustion explosion powder. minimum temperature(MIT) was determined by Godbert-Greenwald furnace energy(MIE) Hartmann apparatus. behavior in apparatus recorded high-speed camera infrared thermal imager. results show that spherical powder with a median diameter 12.5μm had temper...

We obtain interior estimates for a class of semilinear reaction-diffusion systems from L a priori estimates. Our results are applied to a predator-prey model in which the species switch the role of predator and prey on given subsets of their domain of interaction, and a one dimensional flame propagation model. Extensions of earlier results in Morgan [14], [15] follow from the analysis.

In this paper we present a self–adaptive finite element method to solve flame propagation problems in 3D. An implicit time integrator of Rosenbrock type is coupled with a multilevel approach in space. The proposed method is applied to an unsteady thermo–diffusive combustion model to demonstrate its potential for the solution of complicated problems.

This study gives an overview of growth phenomena observed on {OOl} homoepitaxial diamond films grown by hot-filamentassisted CVD and acetylene-oxygen flame deposition. The main emphasis lies on the nucleation and propagation of steps, which form a key to understanding the growth on the (2 x I) reconstructed (001) faces.