Validation of a Modified Eddy Dissipation Concept Model for Stationary and Nonstationary Turbulent Diffusion Flames

Agarwal, Krishna Kant and Ravikrishna, RV (2012) Validation of a Modified Eddy Dissipation Concept Model for Stationary and Nonstationary Turbulent Diffusion Flames. In: Combustion Science and Technology, 184 (2). pp. 151-164.

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Abstract

A transient flame simulation tool based on unsteady Reynolds average Navier Stokes (RANS) is characterized for stationary and nonstationary flame applications with a motivation of performing computationally affordable flame stability studies. Specifically, the KIVA-3V code is utilized with incorporation of a recently proposed modified eddy dissipation concept for simulating turbulence-chemistry interaction along with a model for radiation loss. Detailed comparison of velocities, turbulent kinetic energies, temperature, and species are made with the experimental data of the turbulent, non-premixed DLR_A CH4/H-2/N-2 jet flame. The comparison shows that the model is able to predict flame structure very well. The effect of some of the modeling assumptions is assessed, and strategies to model a stationary diffusion flame are recommended. Unsteady flame simulation capabilities of the numerical model are assessed by simulating an acoustically excited, experimental, oscillatory H-2-air diffusion flame. Comparisons are made with oscillatory velocity field and OH plots, and the numerical code is observed to predict transient flame structure well.

Item Type:	Journal Article
Publication:	Combustion Science and Technology
Publisher:	Taylor and Francis Group
Additional Information:	Copyright of this article belongs to Taylor and Francis Group.
Keywords:	Modified eddy dissipation concept;Non-premixed flame; Transient flame simulation;Turbulent reacting flow
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	27 Feb 2012 10:21
Last Modified:	27 Feb 2012 10:21
URI:	http://eprints.iisc.ac.in/id/eprint/43686

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