Fall Meeting of the Western States Section of the Combustion Institute
A Computational Fluid Dynamics (CFD) tool for performing turbulent combustion simulations that require finite rate chemistry is developed and tested by modeling a series of bluff-body stabilized flames that exhibit different levels of finite-rate chemistry effects ranging from near equilibrium to near global extinction. The new modeling tool is based on the multi-environment probability density function (MEPDF) methodology and combines the following: the direct quadrature method of moments (DQMOM); the interaction-by-exchange-with-the-mean (IEM) mixing model; and realistic combustion chemistry. A pseudo time splitting scheme is adopted to solve the MEPDF equations; the reaction source terms are computed with a highly efficient and accurate in-situ adaptive tabulation (ISAT) algorithm. The modeling results agree very well with the experimental data, including mixing, temperature, major species and important minor species such as CO. More importantly, compared to the Montel-Carlo joint PDF method, the new method provides comparable accuracy and reduces the computational cost by at least one order of magnitude.
The Combustion Institute
Tang, Qing; Zhao, Wei; Bockelie, Micahel; and Fox, Rodney O., "Numerical Simulations of Turbulent Bluff-body Flames using Multi-environment Presumed PDF Method with Realistic Chemistry" (2005). Chemical and Biological Engineering Conference Presentations and Proceedings. 16.