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本文在自行设计分离式热管实验装置的基础上,对其传热特性进行了实验研究。其工作温度为170～250℃,热流密度为25～50 kW/m~2。蒸发段和冷凝段构成相同,均是由7根直径30 mm的无缝钢管短管束组成,管长为160 mm,带有紧套的钢帛环形肋片结构尺寸为:外径45 mm、厚1 mm、片间距4 mm。实验结果表明,在本实验条件下,分离式热管的最佳充液率按管束总容量计为18%～38%。根据实验结果拟合了最佳充液率(24%)下蒸发段内部平均沸腾换热系数和冷凝段内部凝结换热努塞尔数综合关系式。
Based on the self-designed separate heat pipe experimental device, this paper conducts an experimental study on its heat transfer characteristics. The working temperature is 170 ~ 250 ℃, heat flux density is 25 ~ 50 kW / m ~ 2. The evaporation section and the condensation section are of the same composition, each consisting of seven short tube bundles of 30 mm in diameter and having a tube length of 160 mm. The ring-shaped structure of the ring with a tight sleeve is 45 mm in outer diameter and thick 1 mm, sheet spacing 4 mm. The experimental results show that under the experimental conditions, the best liquid separation rate of the heat pipe is 18% ~ 38% according to the total tube bundle capacity. According to the experimental results, the average boiling heat transfer coefficient in the evaporation section and the Nusselt number of condensing heat transfer in the condensing section at the best filling rate (24%) were fitted.