【摘要】 对自行研制的行波型热声发动机中的核心部件加热器进行了改进。采用改进的热声发动机驱动单级小孔型脉管制冷机 ,以氦气为工质 ,在充气压力为 2 2MPa的条件下 ,获得了 110K的最低制冷温度。通过对实验结果的分析 ,着重阐明了热声发动机和脉管制冷机之间的频率匹配问题及其改进途径 ,为进一步深入研究指明了方向。更多还原

【Abstract】 The heater, which is the key part of a thermoacoustic engine is improved. With t he new heater, the self-made traveling-wave thermoacoustic engine was used to drive a single stage orifice pulse tube cooler. Charged with helium of 2.2 MPa, the lowest refrigeration temperature of 110K is obtained. Based on the experime ntal results, the optimum match between the pulse tube cooler and the thermoac oustic engine was discussed and the practical solution was proposed to obtain be tter cooling performance.更多还原