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Sensitivity analysis of LES-CMC predictions of piloted jet flames

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posted on 21.04.2015, 13:24 authored by Andrew GarmoryAndrew Garmory, E. Mastorakos
The sensitivity of Large Eddy Simulation with Conditional Moment Closure (LES-CMC) simulations of the Sandia piloted jet Flames D and F to various parameters have been investigated. It was found that while an LES grid may sufficiently resolve velocity fields, the conditional scalar dissipation rate obtained may still be affected by grid size due to the calculation of sub-grid scalar dissipation rate, and this can affect the degree of localised extinction predicted. A study of the relative size of the terms in the CMC equation during an extinction/reignition event showed that transport, including in the cross stream direction, plays a key role. The results are sensitive to the choice of inlet boundary conditions as extinction is only observed when the inert-mixing distributions in mixture fraction space are used as inlet conditions for the CMC equation in the primary jet and air jets.

Funding

This work was supported by the European Commission (Project “TECCAE”).

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

International Journal of Heat and Fluid Flow

Volume

39

Pages

53 - 63

Citation

GARMORY, A. and MASTORAKOS, E., 2013. Sensitivity analysis of LES-CMC predictions of piloted jet flames. International Journal of Heat and Fluid Flow, 39 pp. 53 - 63.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2013

Notes

NOTICE: this is the author’s version of a work that was accepted for publication in International journal of heat and fluid flow. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International journal of heat and fluid flow, VOL 39, (Feb 2013). DOI: 10.1016/j.ijheatfluidflow.2012.11.007.

ISSN

0142-727X

Other identifier

S0142727X12001439

Language

en