搭建了一套低温热管传热性能测试实验台,基于一种新型矩形内翅片低温热管,首次在-60℃至-40℃的温度下探究了冷凝温度和加热功率对热管稳态等温特性的影响,以及蒸发段和冷凝段长度变化对蒸发传热系数、总热阻值和当量导热系数的影响.研究结果表明:相同工况下,热管的轴向温差随着冷凝温度的降低而减小,随着加热功率的增大而增大;蒸发段长度越大,加热功率越高,蒸发传热系数越大;冷凝段长度越小热管热阻值越低,蒸发段长度越小热阻值越大;当量导热系数随冷凝段长度的减少而增大,随蒸发段长度的减少而减小.%A set of low-temperature heat pipe heat transfer performance test bench was designed,based on a new type of rectangular low-temperature heat pipe,and experiment was carried out at the temperature ranging from-40 ℃ to-60 ℃.Influence of the condensation temperature and heating power on isothermal characteristics of the heat pipe,and the influence of evaporation and condensation section length change on heat transfer coefficient,total heat resistance and equivalent thermal conductivity were investigated.Results show that with the decrease of the condensing temperature,axial temperature difference of the heat pipe decreases,and the axial temperature difference of heat pipe increases with the increase of heating power.It is also found that length change of the evaporation and condensation section has a great influence on heat transfer coefficient,total heat resistance and equivalent thermal conductivity.
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