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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。
Visualization experiments were carried out on oscillating flow heat pipe with amyl alcohol - aqueous solution as working fluid. The temperature of working fluid and the flow pattern of working fluid under different heating power were recorded by micro thermocouple, oscillograph and high speed camera (CCD) . Experimental results show that the mass fraction of 1% amyl alcohol - aqueous solution is conducive to the start of the heat pipe. Oscillating flow tube temperature within the working fluid temperature oscillation frequency and amplitude are greater than pure water oscillating flow heat pipe. With the increase of heating power, the working fluid temperature gradually increases, and the oscillation frequency and amplitude increase with the heating power. Under the same heating power, the amyl alcohol - water heat pipe cold and hot end temperature difference is greater than pure water heat pipe, amyl alcohol - water solution in this mass fraction is not conducive to the oscillation heat pipe heat transfer performance improvement.