Optimal acoustic fields in compact thermoacoustic refrigerators
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- 作者：Gaelle Poign ; Bertr ; Lihoreau ; Pierrick Lotton ; Etienne Gaviot ; Michel Bruneau ; Vitaly Gusev
- 关键词：Thermoacoustics ; Refrigerating systems ; Miniaturisation
- 刊名：Applied Acoustics
- 出版年：2007
- 出版时间：June 2007
- 年：2007
- 卷：68
- 期：6
- 页码：642-659
- 全文大小：954 K
文摘
Thermoacoustic refrigerators have been developed during the last 15 years, employing quasi-standing resonant acoustic waves inside fluid-filled cavities to transfer heat along a stack region. Because higher efficiency can be reached when a significant travelling wave component exists in the resonator, specific resonant thermoacoustic devices have been designed allowing to adjust more or less the ratio of travelling and standing wave components. However, the acoustic pressure field and the particle velocity field do not appear to be the optimal ones, for the thermal quantities of interest. Thus, it is the aim of the paper to present a new kind of thermoacoustic standing wave-like device which allows to control easily and independently the pressure field and the particle velocity field, after investigating the optimal acoustic field, in the stack region, for the main parameters of interest, i.e. the temperature gradient, the thermoacoustic heat flow and the coefficient of performance.