Large-eddy simulation of a turbulent sooting flame in a swirling combustor

Heeseok Koo, Venkat Raman, Michael E. Mueller, Klaus Peter Geigle

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

Large eddy simulation has gained prominence in the simulation of complex reacting flows, especially in the computational modeling of practical combustors. In this work, the use of LES for simulating soot formation in a model aircraft combustor is explored. For this purpose, the DLR swirl combustor that emulates the rich-quench-lean (RQL) configuration using secondary oxidation air injection is used. To begin with, simulations of non-reacting swirling flow are compared with experimental data and found to agree reasonably well. In particular, the mean flow statistics are reproduced quite accurately. LES of the sooting case shows that simulations overpredict soot volume fraction considerably but qualitatively capture the variation in soot evolution when the secondary injection of air is turned off. The simulations indicate a weaker jet trajectory that dissipates faster than in experiments, which leads to ignition and flame stabilization at shorter distance from the inlet. It is also found that the intermittency of soot varies considerably between the cases, with the recirculation zone showing highly intermittent soot structures when the secondary air injection is present.

Original languageEnglish (US)
Title of host publication53rd AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103438
DOIs
StatePublished - Jan 1 2015
Event53rd AIAA Aerospace Sciences Meeting, 2015 - Kissimmee, United States
Duration: Jan 5 2015Jan 9 2015

Publication series

Name53rd AIAA Aerospace Sciences Meeting

Other

Other53rd AIAA Aerospace Sciences Meeting, 2015
CountryUnited States
CityKissimmee
Period1/5/151/9/15

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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    Koo, H., Raman, V., Mueller, M. E., & Geigle, K. P. (2015). Large-eddy simulation of a turbulent sooting flame in a swirling combustor. In 53rd AIAA Aerospace Sciences Meeting [AIAA 2015-0167] (53rd AIAA Aerospace Sciences Meeting). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2015-0167