热源位置对轴向槽道热管传热的影响

探讨了轴向槽道热管垂直安装时热源位置的不同对热管工作特性的影响。当热源位于热管管内工质静止液面以下时，重力的作用提高了垂直安装热管的传热极限。热源相对于热管管内工质静止液面的位置不同时，热管的工作温度、启动过程以及传热极限都表现出不同的特性。当热源位于热管管内工质静止液面附近时，热管存在一个非正常启动过程，在该过程中热管的工作温度会发生瞬态的升高，然后逐渐恢复到正常的工作状态，该瞬态最高温度受热源位置、热管充液量、热管加热速率等因素的影响。当热源的位置高于热管管内工质静止液面一定距离后，热管将无法正常工作。

Effects of heat sources on heat transfer of axially grooved heat pipe

The effect of heat source location on the heat transfer of an axially grooved heat pipe was investigated. An abnormal startup process was observed when the heat source was located at a position on the heat pipe near the stationary level of the working liquid. The work temperature of the heat pipe showed a temporary increase during the abnormal startup process. The highest temperature in the abnormal startup process was influenced by the heat source location, heating rate and liquid volume in the heat pipe. When the heat source was located at different positions on the heat pipe below the stationary level of the working liquid, the working temperature, the startup process and the maximum heat load of the heat pipe were different. The heat pipe could not work normally, when the heat source was located on the heat pipe above the stationary level of the working liquid by a certain distance.