This paper deals with passive stabilization of thermoacoustic dynamics in a Rijke tube using a Helmholtz resonator. Thermoacoustic instabilities result from the dynamic coupling between the heat release and pressure in a chamber. Helmholtz resonators are used akin to vibration absorbers to suppress unwanted pressure oscillations in such structures and prevent instabilities. The first contribution of the paper is a state-space representation of the thermoacoustic dynamics for the resonator-mounted Rijke tube. This relationship happens to be in the class of linear time invariant, neutral multiple time delay systems (LTI-NMTDS). Then, benefiting from the cluster treatment of characteristic roots (CTCR) paradigm, we investigate the effect of resonator location on suppression of thermoacoustic instability. CTCR is a mathematical tool that determines the stability of LTI-NMTDS exhaustively and nonconservatively in the parameter space of the system. This capability provides a novel tool for the futuristic design concepts of combustors. These analytically obtained findings are also supported with experimental results from a laboratory-scale Rijke tube. In addition, a conceptual case study is presented where the stabilizing contributions of the resonator to the dynamics are investigated under strong thermoacoustic coupling.
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February 2018
Research-Article
Analytical and Experimental Study on Passive Stabilization of Thermoacoustic Dynamics in a Rijke Tube
Umut Zalluhoglu,
Umut Zalluhoglu
Department of Mechanical Engineering,
University of Connecticut,
Storrs, CT 06269-3139
e-mail: umut.zalluhoglu@uconn.edu
University of Connecticut,
Storrs, CT 06269-3139
e-mail: umut.zalluhoglu@uconn.edu
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Nejat Olgac
Nejat Olgac
Department of Mechanical Engineering,
University of Connecticut,
Storrs, CT 06269-3139
e-mail: olgac@engr.uconn.edu
University of Connecticut,
Storrs, CT 06269-3139
e-mail: olgac@engr.uconn.edu
Search for other works by this author on:
Umut Zalluhoglu
Department of Mechanical Engineering,
University of Connecticut,
Storrs, CT 06269-3139
e-mail: umut.zalluhoglu@uconn.edu
University of Connecticut,
Storrs, CT 06269-3139
e-mail: umut.zalluhoglu@uconn.edu
Nejat Olgac
Department of Mechanical Engineering,
University of Connecticut,
Storrs, CT 06269-3139
e-mail: olgac@engr.uconn.edu
University of Connecticut,
Storrs, CT 06269-3139
e-mail: olgac@engr.uconn.edu
1Corresponding author.
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received February 19, 2017; final manuscript received July 19, 2017; published online September 20, 2017. Assoc. Editor: Ming Xin.
J. Dyn. Sys., Meas., Control. Feb 2018, 140(2): 021007 (11 pages)
Published Online: September 20, 2017
Article history
Received:
February 19, 2017
Revised:
July 19, 2017
Citation
Zalluhoglu, U., and Olgac, N. (September 20, 2017). "Analytical and Experimental Study on Passive Stabilization of Thermoacoustic Dynamics in a Rijke Tube." ASME. J. Dyn. Sys., Meas., Control. February 2018; 140(2): 021007. https://doi.org/10.1115/1.4037388
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