并联梯形槽道板式脉动热管的启动性能研究

Study on the Start-up Performance of Plate Pulsating Heat Pipe with Parallel Trapezoidal Channel

为分析板式脉动热管启动性能的影响因素,对一种并联梯形槽道板式脉动热管在空气强制对流冷却情况下进行了实验研究。结果表明,热管在低加热功率下的启动行为呈现冷热端温度平稳上升和跳跃两种,其中跳跃行为又分为跳跃后冷热端温度继续上升与逐渐下降两种;而热管在高加热功率下的启动行为主要为温度跳跃;同时实验还发现热管的完全启动温度随充液率及倾角的增加而增加,与加热功率无关;加热功率影响启动速度,功率越高热管启动速度越快。

In order to analyze the factors which affect the start-up performance of plate pulsating heat pipe,a plate pulsating heat pipe with parallel trapezoidal channel was experimentally investigated in the forced air convection cooling conditions. Results indicate that heat pipe start-up behavior at low heating power are temperature rise steadily and jump,and the jump case is divided into two categories： the temperature of evaporator and condensation rise steadily and gradually declined; while heat pipe start-up behavior at high heating power is mainly temperature jump. In addition,the full start-up temperature of heat pipe rises with the increased liquid filling ratio and inclination angle,it has nothing to do with the heating power. Specially,heating power influences the start-up speed. The higher heating power leads to the faster heat pipe start-up.