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首页> 外文期刊>Japanese journal of applied physics >Influence of acoustic impedance in a locally hot region on a thermoacoustic system
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Influence of acoustic impedance in a locally hot region on a thermoacoustic system

机译：声阻抗在热声系统上局部热区域的影响

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In a traveling-wave type thermoacoustic system using a heat phase adjuster (HPA), the sound field control by the local thermal input to the acoustic tube is examined. Focusing the attention on the acoustic boundary conditions produced by a HPA, when the sound pulse is emitted from a loudspeaker, the reflection at the setting position of the HPA is observed. As a result, it is suggested that the reflection phenomenon which takes place corresponding to the operation condition of HPA is a contributing factor to control the sound field in the stack. Regarding the influence of a prime mover (PM) stack and a HPA on the sound field in the tube, it is found that, while PM stack is dominant at low electric power driving of a HPA, the HPA becomes conversely dominant at high-power driving. From this result, a possibility to dynamically control the energy conversion quantity in the stack by using a HPA is shown. (C) 2019 The Japan Society of Applied Physics
机译：在使用热阶段调节器（HPA）的行进波型热声系统中，检查通过局部热输入到声管的声场控制。将注意力集中在由HPA产生的声学边界条件上，当声音脉冲从扬声器发射时，观察HPA的设定位置处的反射。结果，建议对应于HPA的操作条件进行的反射现象是控制堆栈中声场的贡献因子。关于主要动器（PM）堆叠的影响和在管中声场上的HPA的影响，发现PM堆叠在HPA的低电力驱动下占主导地位，但HPA在大功率下变得相反地优势驾驶。从该结果，示出了使用HPA动态控制堆栈中的能量转换量的可能性。 （c）2019年日本应用物理学会

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