Acoustic Stirling engine: Novel development of Stirling engine

这项研究的目的是实现斯特林发动机技术的新发展，将振动的固体活塞替换为气柱或液柱的振动。环管式热声发动机是一种基于气柱不稳定振荡的无活塞斯特林发动机，本研究采用由不同直径的圆柱管组成的同轴管对其进行了改进。此外，在本研究中，利用U形管中液体柱的振荡，开发了一台无活塞斯特林发动机。与使用气柱振荡的发动机相比，这种发动机的工作频率低得多。

Objective of this study was to achieve a novel development on a Stirling engine technology by replacing oscillating solid pistons with oscillations of a gas column or with oscillations of a liquid column. The looped tube type thermoacoustic engine, which had been invented as a pistonless Stirling engine based on unstable oscillations of the gas column, was modified in this study by using a co-axial tube consisting of cylindrical tubes with different diameters. Also, in this study, a pistonless-Stirling engine was developed by using oscillation of a liquid column in a U tube. This type of the engine operates at significantly low frequency compared with that using oscillation of a gas column.