【摘要】 交变流动蓄冷器流动特性的研究是高频脉冲管制冷机进一步实用化的重要课题之一。文中建立了热线风速仪的低温标定实验台和低温交变流动蓄冷器流动阻力的动态测试实验台 ,并在冰盐温度下和液氮温区进行了实验研究 ,重点研究了液氮温区蓄冷器交变流动的阻力特性 ,给出了充气压力、运行频率、丝网目数、小孔开度对交变流动蓄冷器阻力特性的影响。更多还原

【Abstract】 It is an important way to researching the flow characteristics of the regenerator under low temperature for the practical application of the high frequency pulse tube refrigerator. We construct one experimental apparatus to calibrate the hot wire anemometer under low temperature and another dynamic experimental apparatus to investigate oscillating flow characteristics of a regenerator under low temperature. And also, the oscillating flow characteristics of the regenerator is studied experimentally under the temperature range of mixed ice-salt and liquid nitrogen with the focus on the temperature range of liquid nitrogen. The effects of mean pressure, operating frequency, mesh size and opening of the orifice setting on oscillating flow characteristics of regenerator are obtained.更多还原