Rotational Dynamics of a Looped-Tube Thermoacoustic Engine with a Flywheel
Rotational Dynamics of a Looped-Tube Thermoacoustic Engine with a Flywheel
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DOI：
10.1103/physrevapplied.18.044079
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发表时间：
2022-10
影响因子：
4.6
通讯作者：
T. Watanabe;E. Shoji;T. Biwa;G. Penelet
中科院分区：
文献类型：
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作者：
T. Watanabe;E. Shoji;T. Biwa;G. Penelet
在飞轮热声发动机中，飞轮的旋转运动由限制在外部加热的热声发动机中的工作气体的往复运动维持。在这项研究中，在稳态旋转状态下的飞轮的运动方程推导和关键参数控制的环管热声发动机加载的活塞-飞轮组件的旋转动力学进行了研究。我们证明了稳态旋转频率和加热温度之间的关系是由发动机子系统的声阻抗的真实的部分。该结果与具有线性负载的传统热声发动机的结果形成鲜明对比，其中声阻抗的真实的部分和虚部都会影响操作条件。当飞轮被连接时，声阻抗的虚部仅影响旋转频率的时间波动。根据试验结果，讨论了发动机可提取的轴功率。
In a flywheel thermoacoustic engine, the rotating motion of the flywheel is sustained by the reciprocal motion of the working gas confined in an externally heated thermoacoustic engine. In this study, an equation of motion for the flywheel in the steady rotational state is derived and the key parameters governing the rotation dynamics of the looped-tube thermoacoustic engine loaded with a piston-flywheel assembly are investigated. We demonstrate that the relationship between the steady rotation frequency and the heating temperature is determined by the real part of the acoustic impedance of the engine subsystem. This result is in contrast to that of a conventional thermoacoustic engine with a linear load, where both the real and imaginary parts of the acoustic impedance impact the operating condition. When the flywheel is connected, the imaginary part of the acoustic impedance only affects the temporal fluctuation of the rotation frequency. The attainable shaft power that can be extracted from the engine is also discussed based on experimental results.