Effect of a resistive load on the starting performance of a standing wave thermoacoustic engine: A numerical study - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the Acoustical Society of America Année : 2015

Effect of a resistive load on the starting performance of a standing wave thermoacoustic engine: A numerical study

Résumé

The influence of a resistive load on the starting performance of a standing-wave thermoacoustic engine is investigated numerically. The model used is based upon a low Mach number assumption; it couples the two-dimensional nonlinear flow and heat exchange within the thermoacoustic active cell with one-dimensional linear acoustics in the loaded resonator. For a given engine geometry, prescribed temperatures at the heat exchangers, prescribed mean pressure, and prescribed load, results from a simulation in the time domain include the evolution of the acoustic pressure in the active cell. That signal is then analyzed, extracting growth rate and frequency of the dominant modes. For a given load, the temperature difference between the two sides is then varied; the most unstable mode is identified and so is the corresponding critical temperature ratio between heater and cooler. Next, varying the load, a stability diagram is obtained, potentially with a predictive value. Results are compared with those derived from Rott�s linear theory as well as with experimental results found in the literature.
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Dates et versions

hal-01839730 , version 1 (16-07-2018)

Identifiants

  • HAL Id : hal-01839730 , version 1

Citer

Lin Ma, Catherine Weisman, Diana Baltean, Ivan Delbende, Luc Bauwens. Effect of a resistive load on the starting performance of a standing wave thermoacoustic engine: A numerical study. Journal of the Acoustical Society of America, 2015, 138, pp.847-857. ⟨hal-01839730⟩
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