Helmholtz-like resonators for thermoacoustic prime movers.
Helmholtz-like resonators for thermoacoustic prime movers.
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DOI：
10.1121/1.3050263
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发表时间：
2009-02
期刊：
影响因子：
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通讯作者：
Bonnie Andersen;O. Symko
中科院分区：
文献类型：
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作者：
Bonnie Andersen;O. Symko
在热声原动机中，大直径叠层和在包含叠层的谐振器的开口端附加大体积的空腔可以获得高的声输出功率。谐振器和腔体的结合使该器件具有类似亥姆霍兹的特性，具有谐振频率和品质因数Q的特殊特性。基于封闭瓶子模型对其声学行为进行分析，提出了有助于开发这种将能量从热能转换为声音的原动机的特性。具体地说，该布置在腔体中产生由系统的Q确定的高声级。与两端闭合的半波谐振器型原动机进行了比较，说明了类亥姆霍兹器件的优点。
In a thermoacoustic prime mover, high acoustic output power can be achieved with a large-diameter stack and with a cavity with a large volume attached at the open end of the resonator containing the stack. The combination of resonator and cavity makes the device Helmholtz-like, with special characteristics of the resonant frequencies and quality factor, Q. Analysis of its acoustic behavior based on a model of a closed bottle presents features that are useful for the development of such prime movers for energy conversion from heat to sound. In particular, the arrangement produces in the cavity a high sound level, which is determined by the Q of the system. Comparison with a half-wave resonator type of prime mover, closed at both ends, shows the advantages of the Helmholtz-like device.