Advanced CFD Modeling

Large-scale simulations of high speed turbulent combustion

Computational fluid dynamic (CFD) models are playing an increasingly important role in the development of advanced engineering systems involving fluid flow, heat transfer, and chemical reaction. They are particularly useful for the design of high-speed air vehicles and their propulsion systems. However, despite significant progress that has been made in compressible flow and combustion modeling, CFD models are still unreliable when applied to turbulent combustion, especially at very high speeds.

Farhad Jaberi is developing a new class of high fidelity models based on the large eddy simulation concept that can capture the complex interactions between the flow turbulence, shock waves, and combustion and can be used for computations of supersonic turbulent combustion. These computations are conducted on high-performance parallel computers at MSU for conditions where a laboratory experiment isn’t possible or very difficult to conduct. In support of the modeling efforts, detailed, large-scale data are being generated for several fundamental high speed flows by model-free or direct numerical simulation of the basic fluid flow and chemical reaction equations. The numerical data are being used for better understanding of the flow physics and for the improvement of fuel-air mixing, flame holding and combustion efficiency in supersonic ramjet or scramjet engines, operating at hypersonic flight conditions.