ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Properties of high-temperature heat pipe and its experimental
Received date: 2016-05-05
Revised date: 2016-05-26
Online published: 2016-06-07
Supported by
National Basic Research Program of China (2011CB012803);Aeronautical Science Foundation of China (2013ZE25007)
High-temperature heat pipe (HTHP) with sodium as medium, superalloy pipe as container wall and silk screen as wick is designed and prepared. The characteristic of start-up and the isotherm capacity after steady working is tested and studied at different heating power and obliquity with the cooling of eradiation and convection. The results show that all of the HTHPs could be started up successfully at different obliquity, and the start-up time is shorter with higher heating power, but the effect of obliquity on the start-up time is small. There is a sharp increase of temperature on the evaporation section at the obliquity of inverted 45° and inverted 90° with a higher heating power. Analysis suggests that it is due to the drying up of the sodium medium on the evaporation section resulting from the insufficient ability of the silk wick's capillary force, which means the capacity of heat transferring has reached the capillary limit.
NIU Tao , ZHANG Yanling , HOU Hongliang , WANG Yaoqi , HE Duo . Properties of high-temperature heat pipe and its experimental[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(S1) : 59 -65 . DOI: 10.7527/S1000-6893.2016.0165
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