Simulation of Compressible Multi-Phase Turbulent Reacting Flows
Annual rept. 1 Sep 2007-31 Aug 2008
GEORGIA INST OF TECH ATLANTA SCHOOL OF AEROSPACE ENGINEERING
Pagination or Media Count:
Simulation of multi-phase, turbulent reacting flow is in itself a very complex task but when such flows occur in the presence of strong, unsteady shocks additional complexity can arise. Shock interactions with shear turbulence can change turbulent structures and shock induced heating can trigger ignition, combustion and turbulent flame propagation. In this research, a new and an efficient large-eddy simulation LES strategy has been developed to investigate turbulent flows in a high-speed, compressible environment. A new numerical algorithm has been validated that permits a proper capture of strong shocks and shear turbulence simultaneously. This algorithm has been combined with a new dynamic subgrid closure for LES of highly compressible flows such that there are no ad hoc adjustable parameters. Extensive validation has been conducted and application of the hybrid solver to shock-shear interactions, re-shocked Richtmyer-Meshkov instability, and regular and irregular detonations have been demonstrated. These results establish a new capability to simulate high Reynolds number complex flows containing strong shocks, shear turbulence and reacting flows in a multi-phase gas-liquid-solid environment.
- Fluid Mechanics