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为了优化重力式热管内流场和温度场的协同性、改善其内部传热特性,基于场协同理论,根据重力式热管内部的实际几何尺寸及场协同角度等因素,在重力式热管内部设置一种带有锥度的螺旋翅片扰流结构。建立了带有内螺旋翅片的热管模型,圆管长度Lmodel=500 mm,管径D=20 mm,内螺旋翅片长度L2=100 mm,装配尺寸L1=200 mm,管内工质为水,通过计算确定螺旋翅片的螺旋锥角为12.33°,螺旋升角为25.91°。利用流体力学软件对管内的传热与阻力特性进行的数值模拟,结果表明:重力式热管径向传热性能得到改善,在Re=1 800时,热通量增加18.7%,沿程阻力损失hf增加24.88倍,阻力系数f增加23.33倍。
In order to optimize the synergy of the flow field and the temperature field in the gravity heat pipe and improve the internal heat transfer characteristics of the gravity heat pipe, based on the field synergy theory, according to the actual geometry of the gravity heat pipe and the field synergy angle, Spiral with spiral fin spoiler structure. The heat pipe model with inner helical fin was established. The length of pipe was Lmodel = 500 mm, the diameter of pipe was D = 20 mm, the length of inner fin was L2 = 100 mm, the assembly dimension was L1 = 200 mm, The spiral taper angle of the spiral fin was 12.33 ° and the helix angle was 25.91 °. The numerical simulation of the heat transfer and resistance characteristics in the pipe was carried out by using the fluid mechanics software. The results showed that the radial heat transfer performance of the gravity heat pipe was improved. At Re = 1800, the heat flux increased by 18.7% and the resistance loss hf increased 24.88 times, resistance coefficient f increased 23.33 times.