【摘要】 对以戊醇-水溶液为工质的振荡流热管进行可视化实验,应用微型热电偶、示波仪和高速摄像机(CCD)记录下不同加热功率下热管内部的工质温度以及工质流型的变化。实验结果表明,以质量分数为1%的戊醇-水溶液为工质有利于热管的启动。振荡流热管内工质的温度振荡频率与振幅均大于纯水振荡流热管。随着加热功率的增加,管内工质温度逐渐增大,且振荡频率与振幅随着加热功率的增加而增大。在相同的加热功率下,戊醇-水热管冷、热端温差大于纯水热管,在此质量分数下的戊醇-水溶液不利于振荡流热管传热性能的改善。更多还原

【Abstract】 Visualization experiment for oscillating heat pipe was performed with pentanol-water solution as working fluids.The micro thermocouples,oscillograph and charge coupled device were used to record the working fluid temperature and flow pattern variations under different heating power. The results showed that the aqueous solution with pentanol of 1%mass fraction was beneficial to the startup of the oscillating heat pipe.The temperature oscillation frequency and amplitude are greater than that of the water heat pipe.With the growth of heating power,the inner working medium temperature and the temperature oscillation frequency and amplitude all increased.The temperature difference between the evaporation and condensation section of the pentanol-water heat pipe was bigger than that of the water heat pipe in the same heating power.The aqueous solution with pentanol of 1%mass fraction is not conducive to improve the heat transfer performance of oscillating heat pipes.更多还原