Thermoacoustics of solids: A pathway to solid state engines and refrigerators

Journal of Applied Physics - Tập 123 Số 2 - 2018
Haitian Hao1, Carlo Scalo1, Mihir Sen2, Fabio Semperlotti1
1School of Mechanical Engineering, Purdue University 1 , West Lafayette, Indiana 47907, USA
2Aerospace and Mechanical Engineering, University of Notre Dame 2 , Notre Dame, Indiana 46556, USA

Tóm tắt

Thermoacoustic oscillations have been one of the most exciting discoveries of the physics of fluids in the 19th century. Since its inception, scientists have formulated a comprehensive theoretical explanation of the basic phenomenon which has later found several practical applications to engineering devices. To date, all studies have concentrated on the thermoacoustics of fluid media where this fascinating mechanism was exclusively believed to exist. Our study shows theoretical and numerical evidence of the existence of thermoacoustic instabilities in solid media. Although the underlying physical mechanism exhibits some interesting similarities with its counterpart in fluids, the theoretical framework highlights relevant differences that have important implications on the ability to trigger and sustain the thermoacoustic response. This mechanism could pave the way to the development of highly robust and reliable solid-state thermoacoustic engines and refrigerators.

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Journal of Applied Physics

Tập 123 Số 2

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