CUED Publications database

A presumed joint pdf model for turbulent combustion with varying equivalence ratio

Darbyshire, OR and Swaminathan, N (2012) A presumed joint pdf model for turbulent combustion with varying equivalence ratio. Combustion Science and Technology, 184. pp. 2036-2067. ISSN 0010-2202

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Abstract

Modeling of the joint probability density function of the mixture fraction and progress variable with a given covariance value is studied. This modeling is validated using experimental and direct numerical simulation (DNS) data. A very good agreement with experimental data of turbulent stratified flames and DNS data of a lifted hydrogen jet flame is obtained. The effect of using this joint pdf modeling to calculate the mean reaction rate with a flamelet closure in Reynolds averaged Navier-Stokes (RANS) calculation of stratified flames is studied. The covariance effect is observed to be large within the flame brush. The results obtained from RANS calculations using this modeling for stratified jet- and rod-stabilized V-flames are discussed and compared to the measurements as a posteriori validation for the joint probability density function model with the flamelet closure. The agreement between the computed and measured values of flame and turbulence quantities is found to be good. © 2012 Copyright Taylor and Francis Group, LLC.

Item Type: Article
Uncontrolled Keywords: Covariance Partially premixed combustion Presumed pdf Stratified combustion
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:44
Last Modified: 08 Dec 2014 02:32
DOI: 10.1080/00102202.2012.696566