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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Enhancement of Evaporation of a Droplet Using EHD Effect (Measurement of Steady-State Heat Flux During Evaporation of a Single Droplet)
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Enhancement of Evaporation of a Droplet Using EHD Effect (Measurement of Steady-State Heat Flux During Evaporation of a Single Droplet)

机译:利用EHD效应增强液滴的蒸发(单个液滴蒸发过程中的稳态热通量的测量)

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摘要

A further experiment was carried out to confirm EHD (electro-hydrodynamic) effect on enhancement of evaporation of a liquid droplet. A steady-state heat flux during evaporation of a single droplet was measured by controlling the flow rates of liquid and heat supplied to the droplet. The liquids used in this experiment were refrigerant R113 and ethanol. A DC electric voltage was applied between the heat transfer surface and a needle nozzle which was used to supply the test liquid. The result indicated that in the case of R113 droplet, a higher electric voltage was needed to enhance evaporation. On the other hand, in the case of ethanol droplet, evaporation enhancement was observed at a lower voltage, in particular at the region of low surface superheat. This tendency agreed with the result of a preceding report of this study in which the evaporation time of an ethanol droplet was measured. In the present experiment, the enhancement ratios of evaporation of R 113 and ethanol droplets were 1~2.8 and 1~7.6, respectively.
机译:进行了进一步的实验,以确认EHD(电-流体动力学)对增强液滴蒸发的作用。通过控制液体和提供给液滴的热量的流量,可以测量单个液滴蒸发过程中的稳态热通量。本实验中使用的液体是制冷剂R113和乙醇。在传热表面和用于提供测试液体的针形喷嘴之间施加直流电压。结果表明,在R113液滴的情况下,需要更高的电压来增强蒸发。另一方面,在乙醇滴的情况下,在较低电压下,尤其是在表面过热低的区域,观察到蒸发增强。这种趋势与该研究的先前报告的结果一致,在该研究中,测量了乙醇液滴的蒸发时间。在本实验中,R 113和乙醇液滴的蒸发增强比分别为1〜2.8和1〜7.6。

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