Abstract This paper investigates the dynamic behaviour of a one-dimensional, standing-wave thermoacoustic engine with various boundary conditions. The thermoacoustic engine is composed of an acoustic tube and a ceramic stack with two heat exchangers. The tube has one end open and the other end closed with a deformable plate whose boundaries are constrained. Theoretical models are developed based on the acoustic wave equations and the linear theory of thermoacoutics and validated by experiment. With the validated theoretical models, a parametric study is performed to investigate the influence of the boundary conditions at both ends of the tube. It is found that acoustic radiation at the open end and the presence of the deformable structure at the closed end not only influence the onset temperature and frequency of the system, but also affect the acoustic field along the tube. The developed theoretical models and experimental method in this study provide useful guidelines for the design of thermoacoustic engines for potential energy harvesting systems.

中文翻译：

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具有各种边界条件的驻波热声发动机动态行为的理论和实验研究

摘要 本文研究了具有各种边界条件的一维驻波热声发动机的动态行为。热声发动机由一个声管和一个带有两个热交换器的陶瓷堆组成。该管的一端是开放的，另一端是封闭的，其边界是受约束的可变形板。理论模型是基于声波方程和热声学线性理论开发的，并通过实验验证。使用经过验证的理论模型，进行参数研究以研究管两端边界条件的影响。发现开口端的声辐射和封闭端可变形结构的存在不仅影响系统的起始温度和频率，但也会影响沿管的声场。本研究中开发的理论模型和实验方法为势能收集系统的热声发动机设计提供了有用的指导。