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Nonlinear Modeling of Thermoacoustic Systems

Thermoacoustic systems convert heat into acoustic power (and vice versa). To predict performance, higher harmonics and streaming must be taken into account. In this Euronoise publication, the authors present a frequency-domain method that significantly reduces computation time.

Non-linear modeling in the frequency domain

Thermoacoustic systems convert heat into acoustic power with few moving parts . To predict performance, non-linear effects, such as higher harmonics and Gedeon streaming, must be taken into account . The authors present a non-linear frequency-domain method that directly calculates the periodic steady-state . As a result, the long turn-on process does not need to be simulated in the time domain, which significantly reduces computation time . Application to an experimental standing-wave motor shows accurate agreement with measurement data .

Citation for the publication

  • Authors: JA de Jong (University of Twente), YH Wijnant (University of Twente), A. de Boer (University of Twente) & D. Wilcox (Chart Inc. – Qdrive)

  • Publication: Proceedings of the 10th European Conference on Noise Control (Euronoise 2015), pp. 527–531

  • Location & Date: Maastricht, The Netherlands (31 May – 3 June 2015)

  • Keywords: Thermoacoustics, non-linear acoustics, frequency domain method, harmonics, Gedeon streaming

  • Download / View the conference paper (PDF)

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