Modern high speed aerospace propulsion relies on the development of scramjet engines significantly. Design of a supersonic combustor involves the potential problems of proper mixing, flame holding as well as flame stabilization within the very short period. Many techniques were introduced to overcome these problems, of which cavity flame holders has evolved as one of the prominent among them. T...

Studies of radiation emissions from turbulent buoyant diffusion flames impinging on structural elements have applications to the development of fire models and estimation of structural integrity under large heat loads. An experimental and numerical study of radiation emissions from turbulent buoyant diffusion flames with and without impingement on a flat plate is reported. The steel plate was s...

Received ; accepted – 2 – ABSTRACT We present a statistical model which shows the influence of turbulence on a thermonuclear flame propagating in C+O white dwarf matter. Based on a Monte Carlo description of turbulence, it provides a method for investigating the physics in the so-called distributed burning regime. Using this method we perform numerical simulations of turbulent flames and show t...

We examine the combustion of mixed H2-CH4-air fuels using two-dimensional simulations that incorporate detailed kinetics and a mixture-averaged model for differential species transport. The mixtures range from lean H2-air at φ=0.37 to lean CH4-air at φ=0.7. For each mixture, we compute the quasi-steady propagation of a flame into flow with superimposed low-level turbulent fluctuations. We exami...

This study concerns high temperature flame synthesis of ceramic deposits utilizing a mono-disperse stream of droplets composed of an aqueous precursor. The droplets were injected into an oxy-acetylene flame. Mono-disperse droplets were generated with an electrostatic spray technique. High-speed droplet images suggest evidence of shedding of small particulates from the droplet surface as they en...

Flame stabilization by swirl is a common feature of many combustors. While most of the swirl combustors are enclosed, there have been relatively few studies of open swirl-stabilized flames. In the current study, an open swirl-stabilized turbulent premixed flame is studied numerically. The purpose of this work is to obtain a better understanding of the flame properties by simulating the flow fie...

It is known that unconfined dust explosions typically start off with a relatively weak primary flame followed by a severe secondary explosion. We show that clustering of dust particles in a temperature stratified turbulent flow ahead of the primary flame may give rise to a significant increase in the radiation penetration length. These particle clusters, even far ahead of the flame, are suffici...