Analysis and Control of an Unstable Mode in a Combustor with Tuneable End Condition

Heckl, Maria; Kosztin, Béla

Abstract

A major problem in the development of low-pollution combustion systems are thermo-acoustic instabilities, i.e. large-amplitude oscillations generated by a feedback between the unsteady heat release and acoustic waves. In order to develop robust control strategies, it is necessary to have a predictive model that captures the physics of the phenomenon. The aim of this paper is to present such a model for a dump combustor with a generic heat release law, and fitted at the inlet end with a perforated plate backed by a tuneable cavity. Our model leads to a simple governing equation for one acoustic mode in the combustor, and from this equation stability predictions can be made with a minimum of numerical effort. We will use it to examine the effect of various system parameters.

Citation

Heckl, M., & Kosztin, B. (2013). Analysis and Control of an Unstable Mode in a Combustor with Tuneable End Condition. International Journal of Spray and Combustion Dynamics, 5(3), 243-271. https://doi.org/10.1260/1756-8277.5.3.243

• Journal Article Type: Article
• Online Publication Date: Sep 1, 2013
• Publication Date: 2013-09
• Deposit Date: Jun 14, 2023
• Journal: International Journal of Spray and Combustion Dynamics
• Print ISSN: 1756-8277
• Electronic ISSN: 1756-8285
• Publisher: SAGE Publications
• Peer Reviewed: Peer Reviewed
• Volume: 5
• Issue: 3
• Pages: 243-271
• DOI: https://doi.org/10.1260/1756-8277.5.3.243
• Keywords: General Physics and Astronomy; Automotive Engineering; Energy Engineering and Power Technology