Experimental demonstration of thermoacoustic energy conversion in a resonator.
Experimental demonstration of thermoacoustic energy conversion in a resonator.
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DOI：
10.1103/physreve.69.066304
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发表时间：
2004-06
期刊：
影响因子：
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通讯作者：
T. Biwa;Y. Tashiro;U. Mizutani;M. Kozuka;T. Yazaki
中科院分区：
文献类型：
--
作者：
T. Biwa;Y. Tashiro;U. Mizutani;M. Kozuka;T. Yazaki
利用热声能量转换，声强的放大和阻尼证明。差热回热器安装在谐振器的速度节点附近，从而获得高的比声阻抗和行波相位。结果表明，行波能量转换产生的声强增益在正温度梯度下可达1.7，在负温度梯度下可达0.3。当用叠层代替回热器时，发现增益达到2.3，超过叠层两端的温度比（=1.9）。这是通过增加驻波能量转换带来的。本研究结果将有助于利用热声能量转换的新型声学器件的开发。
Using thermoacoustic energy conversions, both amplification and damping of acoustic intensity are demonstrated. A differentially heated regenerator is installed near the velocity node of the resonator and thereby a high specific acoustic impedance and a traveling wave phase are obtained. It is shown that the gain of acoustic intensity resulting from the traveling wave energy conversion reaches 1.7 in a positive temperature gradient and 0.3 in a negative gradient. When the regenerator is replaced with a stack, it is found that the gain reaches 2.3, exceeding the temperature ratio (=1.9) of both ends of the stack. This is brought about by the addition of standing wave energy conversion. The present results would contribute to the development of new acoustic devices using thermoacoustic energy conversion.