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Experimental study on heat transfer characteristics of high-temperature heat pipe

ABSTRACT
High-temperature heat pipes have broad application prospects in terms of thermal protection of hypersonic aircraft and cooling of space nuclear reactors. In this paper, a high-temperature heat pipe heat transfer performance experimental platform is built to study the heat transfer performance of high-temperature heat pipes at different inclination angles. A heat transfer network model of high-temperature heat pipes containing non-condensable gas is established to analyze the influence of non-condensable gas. The results show that as the inclination angle of the heat pipe increases, the start-up time of the heat pipe does not change. The heat transfer performance is best when the inclination angle is 30°. High-temperature heat pipes containing non-condensable gas will reduce the effective length of the high-temperature heat pipe, increase the thermal resistance, and reduce the heat transfer performance. The high-temperature heat pipe analysis model with non-condensable gas established in this paper can be used to predict the heat transfer performance of high-temperature heat pipes containing non-condensable gas.
KEYWORDS
PAPER SUBMITTED: 2022-02-07
PAPER REVISED: 2022-08-21
PAPER ACCEPTED: 2022-08-22
PUBLISHED ONLINE: 2022-09-10
DOI REFERENCE: https://doi.org/10.2298/TSCI220207118X
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