High temperature heat pipe (HTHP) employs alkali metal or its alloy as working fluid. Due to the large latent heat of its working fluid during phase change heat transfer, HTHP has the advantages of high temperature uniformity, high working temperature and high intensity heat transfer capacity, which has broad application prospects in the field of HTHP cooled nuclear reactors and the thermal protection of hypersonic vehicles. In order to simplify the structure of heat transfer system in nuclear reactors, so that it can safely and reliably realize passive heat transfer without additional pump power under various operating conditions, HTHP must have adaptive heat transfer capacity. In this paper, several HTHPs with excellent heat transfer performance are designed and prepared. The test-bed for frozen startup and heat transfer performance of HTHP is set up, and the electromagnetic induction high frequency heater is used as high temperature heat source. The thermal performance of HTHP with different heating power, heating position and the length of evaporation section (adaptive heat transfer characteristics) is experimentally studied, and the theoretical model is used to validate the experimental result. The experimental and theoretical results show that high vacuum degree is the prerequisite for excellent heat transfer performance of HTHP; high capillary driving force and suction force, reasonable filling ratio of working fluid are the key factors for HTHP to have adaptive heat transfer capacity, and the diameter of HTHP also has important influence on adaptive heat transfer capacity.

高温热管（HTHP）采用碱金属或其合金作为工作流体。高温高压由于其工质在相变传热过程中潜热较大，具有温度均匀性高、工作温度高、强度传热能力强等优点，在高温高压冷却核反应堆领域具有广阔的应用前景。高超音速飞行器的热保护。为了简化核反应堆传热系统的结构，使其在各种工况下无需额外泵浦功率即可安全可靠地实现被动传热，高温高压必须具有自适应传热能力。在本文中，设计和制备了几种具有优异传热性能的 HTHP。搭建了高温高压冷冻启动及传热性能试验台，以电磁感应高频加热器为高温热源。对不同加热功率、加热位置和蒸发段长度（自适应传热特性）的高温高压热性能进行了实验研究，并利用理论模型对实验结果进行了验证。实验和理论结果表明，高真空度是HTHP优良传热性能的前提；高毛细管驱动力和吸力、合理的工质填充比是HTHP具有自适应传热能力的关键因素，HTHP的直径对自适应传热能力也有重要影响。以电磁感应高频加热器为高温热源。对不同加热功率、加热位置和蒸发段长度（自适应传热特性）的高温高压热性能进行了实验研究，并利用理论模型对实验结果进行了验证。实验和理论结果表明，高真空度是HTHP优良传热性能的前提；高毛细管驱动力和吸力、合理的工质填充比是HTHP具有自适应传热能力的关键因素，HTHP的直径对自适应传热能力也有重要影响。以电磁感应高频加热器为高温热源。对不同加热功率、加热位置和蒸发段长度（自适应传热特性）的高温高压热性能进行了实验研究，并利用理论模型对实验结果进行了验证。实验和理论结果表明，高真空度是HTHP优良传热性能的前提；高毛细管驱动力和吸力、合理的工质填充比是HTHP具有自适应传热能力的关键因素，HTHP的直径对自适应传热能力也有重要影响。对不同加热功率、加热位置和蒸发段长度（自适应传热特性）的高温高压热性能进行了实验研究，并利用理论模型对实验结果进行了验证。实验和理论结果表明，高真空度是HTHP优良传热性能的前提；高毛细管驱动力和吸力、合理的工质填充比是HTHP具有自适应传热能力的关键因素，HTHP的直径对自适应传热能力也有重要影响。对不同加热功率、加热位置和蒸发段长度（自适应传热特性）的高温高压热性能进行了实验研究，并利用理论模型对实验结果进行了验证。实验和理论结果表明，高真空度是HTHP优良传热性能的前提；高毛细管驱动力和吸力、合理的工质填充比是HTHP具有自适应传热能力的关键因素，HTHP的直径对自适应传热能力也有重要影响。实验和理论结果表明，高真空度是HTHP优良传热性能的前提；高毛细管驱动力和吸力、合理的工质填充比是HTHP具有自适应传热能力的关键因素，HTHP的直径对自适应传热能力也有重要影响。实验和理论结果表明，高真空度是HTHP优良传热性能的前提；高毛细管驱动力和吸力、合理的工质填充比是HTHP具有自适应传热能力的关键因素，HTHP的直径对自适应传热能力也有重要影响。