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本文对旋转热管内部工质的流动和传热机理开展研究,建立数学模型,采用VOF模型描述两相流动和传热传质过程,考虑了相变饱和温度和饱和压力的依变关系,获得了工质的速度、温度以及两相分布特性。研究表明,冷凝端和绝热端交界处热阻较大,壁面过冷度大;旋转热管轴向热阻很小,具有较好的等温性;随着传热量增大,冷凝端过冷度和蒸发端过热度均增大,总热阻增大。结果表明该方法可以较好地模拟旋转热管内工质的流动和传热特性。
In this paper, the flow and heat transfer mechanism of working fluid inside the rotating heat pipe are studied. The mathematical model is established. The VOF model is used to describe the two-phase flow and heat and mass transfer process. The dependence of the phase transition saturation temperature and saturation pressure is obtained. Working fluid speed, temperature and two-phase distribution. The results show that the thermal resistance at the junction of the condensation end and the adiabatic end is large, and the supercooling degree of the wall is large. The axial thermal resistance of the rotary heat pipe is small and has good isothermal properties. With the increase of heat transfer, Evaporation end of the superheat are increased, the total thermal resistance increases. The results show that this method can simulate the flow and heat transfer characteristics of the working fluid in a rotating heat pipe well.