中文摘要：

为探索发电机负载与热声发动机之间的耦合规律,开展发电机负载和声学传输管对斯特林型热声发动机工作特性影响的理论与实验研究.自行搭建一套斯特林型热声发动机驱动单直线发电机的实验系统,通过控制发动机与发电机间球阀的开关考察发动机在有无负载情况下的工作特性,通过改变声学传输管长度考察声学传输部件对发动机输出特性的影响.研究表明,发电机负载使系统起消振温度提高,而接入发电机负载前后系统工作频率基本不变;通过优化声学传输部件可有效改善发动机的输出特性,提高发动机的输出压力振幅和发电机输出电功;计算结果表明,改善频率匹配可大幅提高热声发动机驱动发电机系统的性能.

英文摘要：

Theoretical and experimental investigations on the effects of alternator load and acoustic transfer tube on the performance of a Stirling-type thermoacoustic engine were conducted to study the coupling laws between the linear alternator load and the engine.A self-designed experimental system of a Stirling-type thermoacoustic engine driving single linear alternator was constructed.The working characteristics of the system with and without the linear alternator load were investigated by controlling the ball valve between the engine and the alternator,and the effects of acoustic transfer component on the output characteristics of the system were studied by changing the length of the acoustic transfer tube.The results show that the alternator load makes the onset and the damping temperatures higher while the frequency rarely changed.The optimization of the transfer tube between the engine and the alternator load improves the output characteristics of the engine,amplifies the output pressure amplitude,and increases the output electrical power of the alternator.Furthermore,the computational results also demonstrate that the optimization of the working frequency matching will effectively improve the performance of the thermoacoustic generator system.