Chemical and Biomolecular Engineering Research and Publications


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This article was published in Chemical Engineering Science, Vol. 53, No. 9, pp. 1679-1687, 1998. © 1998 Elsevier Science Ltd. All rights reserved. This is author's version. For the publishers version please visit the Journal home Chemical Engineering Science. Material copyrighted by Publisher and any form of reproduction with out the written permission of the publisher is prohibited.


Abstract-Combustion-driven acoustic oscillations are investigated by performing a onedimensional stability analysis of a burner-stabilized premixed flame. In contrast to other investigators, no initial acoustic wave is assumed in the analysis; the downstream acoustic field results from flame instability. Two models are considered: the thermodiffusive model (uncoupled model) and the fully coupled thermodiffusive-hydrodynamic model. The fully coupled problem exhibits instability at a much lower critical Lewis number than the uncoupled problem.