Stirling / pulse tube hybrid refrigerator (SPR) has attractive prospects due to its high reliability, high efficiency and compactness around 30 K. As the typical characteristics of the SPR, the inter-stage cooling capacity allocation characteristics allows the refrigerator to shift cooling capacity of both stages by adjusting the movement of the displacer, which enables the SPR to meet the demand of time-varying heat loads at different cooling temperatures and makes it a competitive choice in complicated space applications. In this paper, a SPR designed by our lab is adopted to study the typical characteristics. A one-dimensional thermoacoustics-based numerical model is adopted to optimize the structure parameters and the operating parameters. The cooling capacities, relative Carnot efficiencies at different displacer phases are given. The axial distributions of gas temperature and wall temperature in SPR are drawn. In addition, axial distributions of pressure amplitude, phase difference between volume flow and pressure wave and acoustic power are presented and compared. Experimental results operating at different mean pressures and frequencies are given. Compared the experimental results with the corresponding simulation results, a good consistency is revealed. The experimental results show that the SPR can obtain cooling capacities of 8.8 W at 80 K plus 0.81 W at 30 K with an input electric power of 245 W, which indicates an overall relative Carnot efficiency of 12.85%.

斯特林/脉冲管混合式制冷机（SPR）由于其高可靠性，高效率和30 K左右的紧凑性而具有诱人的前景。作为SPR的典型特性，级间制冷量分配特性使制冷机能够改变制冷量。这两个阶段都通过调节置换器的运动实现，从而使SPR能够满足不同冷却温度下时变热负荷的需求，使其成为复杂空间应用中的竞争选择。在本文中，我们实验室设计的SPR被用来研究典型特性。采用一维基于热声的数值模型来优化结构参数和运行参数。给出了不同置换器相的冷却能力，相对卡诺效率。绘制了SPR中气体温度和壁温的轴向分布。此外，给出并比较了压力振幅的轴向分布，体积流量与压力波之间的相位差以及声功率。给出了在不同平均压力和频率下运行的实验结果。将实验结果与相应的仿真结果进行比较，显示出良好的一致性。实验结果表明，SPR在输入功率为245 W时，在80 K时可获得8.8 W的冷却能力，在30 K时可获得0.81 W的冷却能力，这表明总的相对卡诺效率为12.85％。提出并比较了体积流量与压力波之间的相位差以及声功率。给出了在不同平均压力和频率下运行的实验结果。将实验结果与相应的仿真结果进行比较，显示出良好的一致性。实验结果表明，SPR在输入功率为245 W时，在80 K时可获得8.8 W的冷却能力，在30 K时可获得0.81 W的冷却能力，这表明总的相对卡诺效率为12.85％。提出并比较了体积流量与压力波之间的相位差以及声功率。给出了在不同平均压力和频率下运行的实验结果。将实验结果与相应的仿真结果进行比较，显示出良好的一致性。实验结果表明，SPR在输入功率为245 W时，在80 K时可获得8.8 W的冷却能力，在30 K时可获得0.81 W的冷却能力，这表明总的相对卡诺效率为12.85％。