【作者】 毛长松；

【导师】 金滔；

【作者基本信息】 浙江大学 ， 制冷及低温工程， 2007， 硕士

【摘要】 热声热机由于具有完全无运动部件、可实现长寿命运转、可利用低品位能源以及对环境友好等优点，越来越受到人们的重视。在模拟计算的基础上，本课题组研制了一台热声斯特林型发动机。鉴于热声起振和消振过程对于低品位热能的利用来说非常重要，本文着重就起振和消振过程中的温度和压力特性等开展了以下几方面的工作：1．在前人部分搭建工作的基础上，完成和改进实验台的建设工作，并实现了实验台的成功运转。进而，对所搭建的热声斯特林型发动机的基本性能进行初步实验研究。具体研究内容将主要包括发动机的压比特性、起振和消振特性和频率特性等，便于掌握该发动机的基本性能，为明确下一步研究工作的方向和重点打下基础；2．对热声系统起振和消振行为和过程进行深入细致的研究，在分析热声滞后回路的影响因素和滞后回路的形成过程的基础上，着重考察了加热功率和充气压力对热声起振和消振特性的影响，指出了热声起振和消振过程中的发生滞后回路的条件，为理解热声系统的起振和消振行为提供了有益的参考；3．考察了结构参数对热声系统起振和消振特性的影响，并通过改变该热声发动机的谐振管长度和膜片的安装位置等结构参数来研究了热声系统的起振和消振特性。还研究了热声环路中弹性膜的安装位置对热声系统性能的影响，试验结果表明，在某些条件下，膜片位置对系统压比性能的提高是有益处的。更多还原

【Abstract】 Thermoacoustic engine attracts increasing attention from academic and industrial circles, because of its advantages such as without moving parts, using thermal energy as driving source and environmental benignity. A thermoacoustic Stirling engine has been set up by this group for experiments. Considering the importance of the onset and damping behavior for the application of low-grade energy, the emphasis of this thesis work are focused on the onset and damping characteristics of the thermoacoustic system. The present work mainly includes:1. Completed the construction of the experimental thermoacoustic Stirling engine, mainly including the improvement of some components and the setup of data acquisition system. Then some preliminary studies on the experimental equipment have been carried out for overall performance as a base of further study.2. Systematic experiments have been conducted especially on the onset and damping behaviors in depth and detail. A hysteretic loop, which was firstly found in a standing wave thermoacoustic prime mover, is also found in this present thermoacoustic Stirling system. The influencing factors of the loop are analyzed to understand its occurrence mechanism and also the thermoacoustic oscillation.3. The influence of structural factors, including resonance tube length and membrane location, was also observed to discuss the possibility of improving the performance of the thermoacoustic engine by optimizing these factors.更多还原