Several analytical or numerical models available in the litterature allow to predict the onset of thermoacoustic engines [5, 6, 11]. However, most of these models rely on strong assumptions concerning for instance the stack geometry or the shape of the temperature field in the thermoacoustic core. The purpose of the work presented here is to put forward a new method allowing the prediction of the onset of the thermoacoustic instability while being exempted from a certain number of these assumptions. This method consists in measuring the transfer matrix of the thermoacoustic core by means of an appropriate experimental setup developed in our laboratory. The results are then introduced into an analytical modeling leading to the prediction of the onset conditions (in terms of heating power supply and acoustic frequency) of the thermoacoustic instability in an engine of specified geometry (straight duct or closed loop, coupled or not with an acoustic load like a secondary resonator or an electrodynamic alternator). The results of measurements will be presented, and the predictions of the onset obtained from these measurements will be compared with those actually observed in a standing-wave thermoacoustic engine.
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ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
August 1–5, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4949-1
PROCEEDINGS PAPER
Semi-Analytical Determination of the Onset Conditions of Thermoacoustic Engines Available to Purchase
Matthieu Guedra,
Matthieu Guedra
Universite´ du Maine, Le Mans, France
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Guillaume Penelet,
Guillaume Penelet
Universite´ du Maine, Le Mans, France
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Pierrick Lotton
Pierrick Lotton
Universite´ du Maine, Le Mans, France
Search for other works by this author on:
Matthieu Guedra
Universite´ du Maine, Le Mans, France
Guillaume Penelet
Universite´ du Maine, Le Mans, France
Pierrick Lotton
Universite´ du Maine, Le Mans, France
Paper No:
FEDSM-ICNMM2010-30639, pp. 81-89; 9 pages
Published Online:
March 1, 2011
Citation
Guedra, M, Penelet, G, & Lotton, P. "Semi-Analytical Determination of the Onset Conditions of Thermoacoustic Engines." Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 2, Fora. Montreal, Quebec, Canada. August 1–5, 2010. pp. 81-89. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-30639
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