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在膨胀比ε＝２～６范围内，对气波制冷机振荡管（接受管）外有、无翅片两种情况进行了比较性试验。结果表明：强化管外换热能显著提高振荡管的制冷效率，并对管内振荡流特性产生影响
In the expansion ratio ε = 2 ~ 6 within the scope of the gas-chiller oscillator tube (receiver tube) outside, without fin two cases were comparative test. The results show that enhanced heat transfer outside the tube can significantly improve the cooling efficiency of the oscillating tube and have an impact on the oscillating flow characteristics in the tube