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强化传热期刊
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ISSN 打印: 1065-5131
ISSN 在线: 1026-5511

强化传热期刊

DOI: 10.1615/JEnhHeatTransf.v3.i3.50
pages 211-219

EHD Augmentation of Nucleate Boiling at a Gewa-T Surface

Y. Y. Yan
Thermo-Fluids Engineering Research Centre, Dept. of Mechanical Engineering and Aeronautics, City University, London, EC1V OHB, U.K.
R. S. Neve
Thermo-Fluids Engineering Research Centre, Dept. of Mechanical Engineering and Aeronautics, City University, London, EC1V OHB, U.K.

ABSTRACT

In this paper, the electrohydrodynamic (EHD) augmentation of nucleate boiling at a passive enhanced surface, Wieland Gewa-T, is reported. The experiments were carried out using a single tube heat exchanger test rig by applying a 0 − 20 kV radial d.c. field to a dielectric liquid (Refrigerant R l14) on the Gewa-T surface. The results were compared with those for other surfaces obtained under the same experimental conditions. The mechanism of the EHD effects on nucleate boiling at a passive enhanced surface is discussed and analysed. The results indicate that the nucleate boiling for such a surface can be further enhanced at low superheat by utilizing the EHD effect. The elimination of boiling hysteresis and thermal controllability were also demonstrated in the experiments.


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