Reacting high-speed turbulent flows

Air Force Office of Scientific Research           Graduate Student: Jeffrey Doom 
Hypersonics Center

                  

The long-term goal of this project is to develop the simulation capability for turbulent reacting flows at both very low and high Mach numbers. Heat release produces large gradients in flow variables, and chemical reactions occur over a wide range of time-scales. Both factors affect the stability and accuracy of most numerical methods. These issues are being addressed at present. A novel algorithm has been developed by Doom, Hou & Mahesh (Journal of Computational Physics, 2007, 226: 1136-1151) that addresses these issues.The ability to handle chemical stiffness, low and finite Mach numbers, and turbulence has been demonstrated. The above figures show snapshots of temperature and reaction rate from DNS of a diffusion flame using a detailed chemical mechansim for hydrogen-oxygen combustion.

Publications

 

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