The purpose of this work is to analyze and model the interaction between turbulence and combustion in LES modeling, particularly focusing on small scales, and to increase subgrid phenomenon modeling accuracy in order to perform more precise numerical simulations of turbulent reacting flows. The Crocco-Vazsonyi equation has been used as the starting point of this analysis because it links fluid-dynamic properties of the flow to the thermodynamic ones. A kinetic energy transport equation specialized for small scales of turbulence has been obtained and a kinetic energy source term was isolated. This term expresses the turbulence-combustion interaction at the "fine" scales of the LES simulation and takes into account the fluid-dynamic properties together with the thermodynamic effects due to chemical reactions. Moreover momentum and species source terms were derived to complete the description of small scale phenomena. This source term model has been proven to be consistent with combustion physics by analyzing source term distributions for both a 2D non-reactive and a 3D reactive flow. A coaxial burner investigated at Sydney University was used as test case. Kinetic energy, momentum and species source terms represent the base for a LES subgrid modeling approach completely independent of classical Eddy Viscosity models. Copyright © 2005 by the American Institute of Aeronautics and Astronautics, Inc. All right reserved.
|Publication status||Published - 2005|
|Event||43rd AIAA Aerospace Sciences Meeting and Exhibit - , United States|
Duration: 1 Jan 2005 → …
|Conference||43rd AIAA Aerospace Sciences Meeting and Exhibit|
|Period||1/1/05 → …|
All Science Journal Classification (ASJC) codes
Parisi, V., Giacomazzi, E., & Bruno, G. (2005). Analysis of small scale turbulence-combustion interaction for les modeling. Paper presented at 43rd AIAA Aerospace Sciences Meeting and Exhibit, United States.