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首页> 外文期刊>Journal of enhanced heat transfer >ENHANCEMENT OF GALLIUM PHASE-CHANGE HEAT TRANSFER BY COPPER FOAM AND ULTRASONIC VIBRATION
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ENHANCEMENT OF GALLIUM PHASE-CHANGE HEAT TRANSFER BY COPPER FOAM AND ULTRASONIC VIBRATION

机译：铜泡沫和超声振动增强镓相变传热

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摘要

In this study, the effects of copper foam and ultrasonic vibration on the melting process of low-melting gallium in a rectangular vessel were experimentally investigated. The effective thermal conductivity, heating wall temperature, most melting duration, and total melting duration during the gallium's melting process were examined for various heating powers. We found that a portion of the gallium remained solid in the corners of the vessel in the late melting stage, and melting the remaining solid portion accounted for approximately 28% of the total melting duration of the pure gallium. In our test, the corresponding heating wall temperature rose significantly during this stage, which reduced the usable volume of the vessel. However, by the addition of copper foam and ultrasonic waves the remaining solid portion was greatly reduced, and the heating wall temperature was controlled. The total melting time for the gallium with added copper foam and ultrasonic waves was reduced by 10% and 17%, respectively, below that for the pure gallium melting process. When heat was added using ultrasonic waves for a long period of the melting process, the temperature of the heating surface was consistently lower than a pure gallium heat regenerator without ultrasonic waves. This would enhance the value of workable condition power for devices.
机译：在这项研究中，实验研究了泡沫铜和超声振动对矩形容器中低熔点镓熔化过程的影响。对于各种加热功率，检查了镓熔化过程中的有效导热率，加热壁温度，大多数熔化时间和总熔化时间。我们发现，在后期熔化阶段，一部分镓在容器的角部保持固态，熔化剩余的固态部分约占纯镓总熔化时间的28％。在我们的测试中，在此阶段相应的加热壁温度显着上升，这减少了容器的可用体积。但是，通过添加泡沫铜和超声波，大大减少了残留的固体部分，并控制了加热壁的温度。添加纯铜泡沫和超声波的镓的总熔化时间分别比纯镓熔化过程的总熔化时间减少了10％和17％。当在长时间的熔化过程中使用超声波加热时，加热表面的温度始终低于没有超声波的纯镓蓄热器。这将提高设备的可用条件功率的价值。

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