论文部分内容阅读
本文对紫铜板式脉动热管表面进行超亲水及亲水处理。通过高速摄像观测液弹脉动时界面三相线的演化过程,研究脉动热管界面的运动规律。实验结果表明液弹脉动过程中,由于液膜沉积的作用液弹尾部脉动热管壁面被一层液膜覆盖。沉积液膜的长度与液弹脉动速度和脉动热管表面润湿性能有关。随着表面润湿性能的提高,相同的加热功率下液膜沉积的长度增加.超亲水和亲水脉动热管液弹脉动的振幅和速度大于普通紫铜脉动热管。脉动热管的传热性能的大小取决于液弹脉动的剧烈程度。亲水表面脉动热管液弹脉动的振幅和速度增加,传热性能高于普通紫铜脉动热管。
In this paper, copper plate pulsating heat pipe surface hydrophilic and hydrophilic treatment. Through the observation of the evolution process of the three-phase interface during the liquid-propellant pulsation with high-speed camera, the movement law of the pulsating heat pipe interface was studied. Experimental results show that in the process of liquid-jet pulsation, the wall of the pulsating heat pipe at the tail of the liquid bomb is covered by a liquid film due to the liquid film deposition. The length of the deposition liquid film is related to the velocity of the liquid propellants and the wettability of the surface of the pulsating heat pipe. With the increase of surface wettability, the length of the liquid film deposition increases with the same heating power.The amplitude and velocity of the liquid projectile pulsation of the superhydrophilic and hydrophilic pulsating heat pipes are larger than those of ordinary copper pulsating heat pipes. Pulsating heat pipe heat transfer performance depends on the size of the severity of the pulsation. Hydrophilic surface pulsating heat pipe liquid bomb pulsation amplitude and speed increase, heat transfer performance higher than ordinary copper pulsating heat pipe.