中文摘要：

与单段惯性管相比,双段惯性管更容易获得较大的调相角度,因此在脉管制冷机中得到越来越广泛的应用.本文建立了单段、双段惯性管数值模型,计算了不同结构尺寸下单段惯性管的调相能力,并对双段惯性管性能进行了详细的研究.结果表明,第2段惯性管会带来压力波和体积流之间更大的相位变化,第2段惯性管的长度比第1段长时更容易达到较大的调相角度.本文对模拟结果进行了试验验证,并且对1台脉管制冷机分别接单段和双段惯性管进行实验研究,在制冷量为4W、温度为60K的工况下,连接双段惯性管的制冷机的输入功下降了5.8%.

英文摘要：

Double-segment inertance tube could provide a larger phase shift than single-segment inertance tube, which is widely used in pulse tube refrigerator. In this paper, simulation models of both single-segment and double-segment inertance tubes are developed and the phase shift performance of the inertance tube is discussed in detail. The results show that the second segment inertance tube brings a larger phase shift between pressure wave and volume flow than that in the first segment inertance tube. A larger phase shift angle could be obtained while the length of the second segment inertance tube is longer than that of the first segment inertance tube. The simulation results are verified by experiments. A pulse tube refrigerator separately connecting with single-segment and double-segment inertance tube is investigated experimentally, and the input electric power is decreased by 5.8% at a cooling capacity of 4W at 60K when the double-segment inertance tube is connected.