论文部分内容阅读
基于线性热声理论,对一台小型热声斯特林发动机进行了数值仿真,并进行了相应的实验研究.计算和实验结果表明,谐振管内径的变化对于小型斯特林热声发动机的谐振频率以及性能具有十分重要的影响.适当减小谐振管的径向尺寸,能够有效降低整机的谐振频率,提高系统波动压力幅值,这对于热声斯特林发动机的小型化具有重要的指导意义.根据计算和分析,搭建了一台小型热声斯特林发动机,其谐振管的长度和内径分别为350mm和20mm,工作频率为282Hz,当充气压力为2MPa,加热量为637W时,系统最大压力峰峰值和压比分别达到了0.22MPa和1.116,初步具备驱动热声制冷机或者热声发电机的能力.
Based on the linear thermoacoustic theory, a small thermoacoustic Stirling engine was numerically simulated and a corresponding experimental study was carried out.The calculation and experimental results show that the change of the inner diameter of the resonance tube is significant for the resonance of a small Stirling thermoacoustic engine Frequency and performance have a very important impact.Appropriate to reduce the radial size of the resonance tube, can effectively reduce the resonance frequency of the machine and increase the system pressure fluctuation amplitude, which is important for the miniaturization of the thermoacoustic Stirling engine Based on the calculation and analysis, a small thermoacoustic Stirling engine was set up, whose length and inner diameter of the resonance tube were 350mm and 20mm, respectively. The working frequency was 282Hz. When the inflation pressure was 2MPa and the heating capacity was 637W, The maximum pressure peak-to-peak pressure ratio reached 0.22MPa and 1.116, respectively, with the initial ability to drive thermoacoustic refrigerator or thermoacoustic generator.