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采用计算机记录毛细抽吸量实时变化曲线的方法,研究了环路热管吸液芯对不同工质的毛细抽吸特性,结果表明所有的吸液芯毛细抽吸过程均可分阶段采用玻耳兹曼方程进行描述,其误差在启动阶段和稳健抽吸阶段分别在5%和1%以内。工质的表面张力越大、密度越大,吸液芯的毛细抽吸量就越大;工质的表面张力越大、黏度越小,毛细抽吸速度越大。对孔隙率为45%～56%的吸液芯进行毛细抽吸实验发现,随着孔隙率的增大,抽吸速度和毛细抽吸量均随之增大,可见适当提高吸液芯的孔隙率有助于提高环路热管的性能。
Using computer to record the real-time curve of capillary suction, the capillary suction characteristics of different working fluids in the loop heat pipe wick were studied. The results showed that all the wick suction processes could be carried out in stages Man’s equation is described, the error in the start-up phase and steady suction phase were 5% and 1%. The greater the surface tension of the working fluid, the greater the density, the greater the capillary suction amount of the wick; the larger the surface tension of the working fluid, the lower the viscosity, the greater the capillary suction speed. The results of capillary suction experiments showed that as the porosity increased, both the suction velocity and the capillary suction increased with the increase of the porosity of 45% ~ 56% Rate helps to improve loop heat pipe performance.