Research Highlights
Direct Numerical Simulations (DNS) of turbulent Combustion
3-D volume rendering of turbulent lifted hydrogen jet flames in heated coflow near auto-ignition limit. The coflow temperature is 750, 850, and 950 K from left to right. The stabilization mechanisms of the lifted flames are elucidated.
This is a visualization of a turbulent lifted ethylene/air jet flame in an autoignitive coflow where the particles are colored by temperature and the volume rendered is the hydroperoxy field.
HCCI engine combustion
Schematic of current and future internal combustion engine concepts: Gasoline, Diesel, and HCCI engines (from Report of the Basic Energy Sciences Workshop on Basic Research Needs for Clean and Efficient Combustion of 21st Transportation Fuels, 2006, DOI: 10.2172/935428)
Schematic of reaction pathways of n-heptane oxidation at different temperatures
Isocontours of participation index of controlling reactions for SCCI combustion
Flame Instabilities
The diffusive-thermal instability of opposed nonpremixed tubular flames with small Lewis number of fuel (LeF < 1)
Hydrogen/air premixed flame stabilization over a square cylinder in a mesoscale combustor. The vortex-shedding behind the cylinder affects the stabilization of the flames