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Journal of Enhanced Heat Transfer
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ISSN Druckformat: 1065-5131
ISSN Online: 1026-5511

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v11.i3.40
pages 231-248

Boiling Heat Transfer Characteristics from a Horizontal Tube Embedded in a Porous Medium with Acoustic Excitation

D. W. Zhou
Institute of Engineering Thermophysics, Chinese Academy of Sciences B12, Zhongguancun, Haidian District, Beijing 100080, P.R. China
Deng-Ying Liu
Beijing Key Laboratory of Energy Safety and Clean Utilization, North China Electric Power University, Beijing 102206; and Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080, China
Ping Cheng
Mechanical Engineering Department, The Hong Kong University of Science and Technology; MOE Key Laboratory for Power Machinery and Engineering, School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

ABSTRAKT

An experiment has been performed for boiling heat transfer from a heated horizontal tube embedded in a porous medium under acoustic excitation. The effects of acoustical parameters, diameter and height of glass beads, and fluid subcooling have been investigated. The general trends of boiling heat transfer enhancement in porous medium by acoustic excitation are the same as those without porous medium, irrespective of fluid subcooling. The effects of glass beads diameter and glass beads height on heat transfer enhancement and boiling hysteresis are discussed. Mechanisms of heat transfer enhancement owing to these effects are analyzed.


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