重力热管传热波动特性研究及抑制方法探讨

重力热管在启动、稳定操作、工况条件变化时的脉冲沸腾和温度波动现象，对热管的传热效果和使用寿命有不利影响。采用简单的弹簧抑泡装置，可以抑制热管内工质产生气泡，吸收气泡中的热能，使工质温度分布趋于均匀，同时，可以强化工质和管壁间的对流换热。实验表明，采用弹簧式抑泡装置的重力热管强化传热效果十分明显。

An Investigation of the Heat-transfer Fluctuation Characteristics in Gravity Heat Pipes and an Exploration of Methods for Their Restraint

Pulse boiling and temperature fluctuations will occur in gravity heat pipes during their startup and in case of a change in their stable operating conditions. This will have a negative effect on the heat transfer efficiency and the service life of heat pipes. The use of a simple spring loaded bubble suppression device may restrain the generation of gas bubbles from working media in heat pipes and absorb the heat energy in gas bubbles, thereby making the working medium temperatures tend to assume a uniform distribution. Meanwhile, this is also conducive to intensifying the convection heat transfer between the working media and pipe walls. Tests have shown that the heat transfer intensification effectiveness of gravity heat pipes is very conspicuous thanks to the use of the above mentioned bubble suppression device.