【摘要】 采用数值模拟方法研究三级同轴脉冲管制冷机,比较分析了同截面回热器和脉冲管的温度差异,并由此研究探讨了回热器各项损失与温度分布的相关性。结果表明,同一级回热器里不同形状的蓄冷材料之间的温度梯度会有较大的变化,导致轴向导热损失的明显增加。更多还原

【Abstract】 A numerical simulation method was used to study a three-stage coaxial pulse tube refrigerator. The temperature difference between regenerator and pulse tube of the same cross-section was compared and analyzed,and the correlation between the various losses of regenerator and the temperature distribution was investigated. The results show that the temperature gradient between different shapes of cold-storage materials in the same heat-recovery stage varies considerably,leading to a significant increase in the axial heat-conducting losses.更多还原