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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：局部高温区域的声阻抗对热声系统的影响

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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：在使用热相位调节器（HPA）的行波型热声系统中，检查了通过对声管的局部热输入的声场控制。将注意力集中在HPA产生的声边界条件上，当从扬声器发出声音脉冲时，可以观察到HPA设置位置的反射。结果表明，对应于HPA的操作条件而发生的反射现象是控制烟囱中声场的促成因素。关于原动机（PM）堆和HPA对电子管内声场的影响，发现虽然在HPA的低功率驱动下PM堆占主导地位，但在高功率下，HPA却占主导地位驾驶。根据该结果，示出了通过使用HPA来动态地控制堆中的能量转换量的可能性。 （C）2019日本应用物理学会

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