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脉动热管通常采用毛细管制造,液塞在运动过程中前进接触角和后退接触角随着管径、管长、充液量、传热量和工质的选择会有很大的不同,存在着毛细滞后效应的影响。本文对毛细管中单个液塞在运动过程中两个接触角和毛细滞后阻力进行了分析。结果表明,接触角滞后对于上述参数变化比较敏感,接触角滞后对于运行是不利的.可以通过毛细管的选取、工质的选择和充液率的改变等来消除毛细滞后的影响。得到的结果对于进一步完善脉动热管的物理模型有重要参考价值。
Pulsatile heat pipe is usually manufactured by capillary tube. The advancement of contact angle and receding contact angle of liquid stopper in the course of movement will vary greatly with the pipe diameter, pipe length, liquid filling amount, heat transfer and working fluid selection. There is capillary lag Effect of the effect. This paper analyzes the two contact angles and the capillary hysteresis drag of a single liquid slug in the capillary during the movement. The results show that the contact angle hysteresis is sensitive to the change of the above parameters and the hysteresis of the contact angle is unfavorable to the operation, and the capillary hysteresis can be eliminated by the selection of the capillary, the selection of the working fluid and the change of the filling rate. The results obtained for the further improvement of the physical model of pulsating heat pipe has important reference value.