Communication Dans Un Congrès Année : 2024

Investigate the contribution of natural convection to the complex temperature distribution in a thermoacoustic core using experiments

Résumé

This study focuses on the influences of natural convection on the temperature distribution in a compact thermoacoustic coaxial heat pump. The behaviour of this device is quite consistent with results of Rott's linear theory of thermoacoustics, but early measurements reveal a non-uniformity of the temperature along the transverse dimension of the core, as well as nonlinear axial temperature profiles. To investigate the contribution of natural convection on these temperature distributions, a hanging system allowing the device to be rotated around 2 axes is implemented. For each configuration, temperature at various locations in the thermoacoustic core is recorded using an array of 3 × 5 thermocouples, and heat balance in the core is performed. All the experimental data are analysed to provide a better understanding of the heat flows in the device.

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hal-05016263 , version 1 (01-04-2025)

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Martin Fontbonne, Islam Ramadan, Gaëlle Poignand, Jean-Christophe Valière, Hélène Bailliet. Investigate the contribution of natural convection to the complex temperature distribution in a thermoacoustic core using experiments. INTER-NOISE, Aug 2025, Nantes (France), France. pp.2931 - 2937, ⟨10.3397/in_2024_3251⟩. ⟨hal-05016263⟩
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