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Title: Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry

Abstract

With the goal of assessing the capability of Computational Fluid Dynamics (CFD) to simulate combustion instabilities, the present work considers a premixed, bluff-body-stabilized combustor with well-defined inlet and outlet boundary conditions. The present simulations produce flow behaviors in good qualitative agreement with experimental observations. Notably, the flame flapping and standing acoustic waves seen in the experiments are reproduced by the simulations. Moreover, present predictions for the dominant instability frequency have an error of 7% and those of the rmspressure fluctuations show an error of 16%. In addition, an analysis of simulation results for the limit cycle complements previous experimental analyses by supporting the presence of an active frequency-locking mechanism.

Authors:
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1562606
Grant/Contract Number:  
FA9101-13-M-0020
Resource Type:
Published Article
Journal Name:
Aerospace
Additional Journal Information:
Journal Name: Aerospace Journal Volume: 6 Journal Issue: 7; Journal ID: ISSN 2226-4310
Publisher:
MDPI AG
Country of Publication:
Country unknown/Code not available
Language:
English

Citation Formats

Gonzalez-Juez, Esteban. Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry. Country unknown/Code not available: N. p., 2019. Web. doi:10.3390/aerospace6070082.
Gonzalez-Juez, Esteban. Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry. Country unknown/Code not available. doi:10.3390/aerospace6070082.
Gonzalez-Juez, Esteban. Sun . "Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry". Country unknown/Code not available. doi:10.3390/aerospace6070082.
@article{osti_1562606,
title = {Numerical Simulations of Combustion Instabilities in a Combustor with an Augmentor-Like Geometry},
author = {Gonzalez-Juez, Esteban},
abstractNote = {With the goal of assessing the capability of Computational Fluid Dynamics (CFD) to simulate combustion instabilities, the present work considers a premixed, bluff-body-stabilized combustor with well-defined inlet and outlet boundary conditions. The present simulations produce flow behaviors in good qualitative agreement with experimental observations. Notably, the flame flapping and standing acoustic waves seen in the experiments are reproduced by the simulations. Moreover, present predictions for the dominant instability frequency have an error of 7% and those of the rmspressure fluctuations show an error of 16%. In addition, an analysis of simulation results for the limit cycle complements previous experimental analyses by supporting the presence of an active frequency-locking mechanism.},
doi = {10.3390/aerospace6070082},
journal = {Aerospace},
number = 7,
volume = 6,
place = {Country unknown/Code not available},
year = {2019},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.3390/aerospace6070082

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