CFD predictions of Damköhler number fields for reduced order modeling of v-gutter flame stability

John M. Roach, Travis C. Fisher, Steven H. Frankel, Balu Sekar, Barry V. Kiel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Computational fluid dynamics (CFD) simulations have been used to extract flow and chemical time scale statistics in the wake of a v-gutter flame. These statistics are used to develop a method for using the local Damköhler number as a predictor of local extinction. CFD predictions are validated by comparing non-reacting flow predictions to available experimental data around the v-gutter. Results are obtained for URANS, DES, and LES turbulence models. URANS reacting flow studies compare two different turbulent combustion models using a one-step global chemical kinetics mechanism. Flow time scale statistics from the different non-reacting turbulence models are compared with those from a URANS reacting model. All flow predictions are obtained using the commercial CFD software package FLUENT. Non-reacting LES and DES simulations showed better agreement with experimental data than URANS. Reacting simulations are used to compare non-reacting and reacting flow time scales, and to extract chemical time scale statistics.

Original languageEnglish
Title of host publication46th AIAA Aerospace Sciences Meeting and Exhibit
StatePublished - 2008
Externally publishedYes
Event46th AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: 7 Jan 200810 Jan 2008

Publication series

Name46th AIAA Aerospace Sciences Meeting and Exhibit

Conference

Conference46th AIAA Aerospace Sciences Meeting and Exhibit
Country/TerritoryUnited States
CityReno, NV
Period7/01/0810/01/08

ASJC Scopus subject areas

  • Aerospace Engineering

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