| Boiling Heat Transfer on Porous Surfaces with Vapor Channelt Transfer on Po |
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| 引用本文： | 吴伟,杜建华,王补宣. Boiling Heat Transfer on Porous Surfaces with Vapor Channelt Transfer on Po[J]. 清华大学学报, 2002, 7(2) |
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| 作者姓名： | 吴伟 杜建华 王补宣 |
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| 作者单位： | WU Wei，DU Jianhua，WANG Buxuan Department of Thermal Engineering，Tsinghua University，Beijing 100084，China |
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| 基金项目： | Supported by the National Natural Science Foundationof China ( No.5 9995 5 5 0 - 3 ) and partly by the “985”Foundation of Tsinghua U niversity |
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| 摘 要： | IntroductionThe enhanced boiling heat transfer on poroussurfaces has been of considerable research interestmainly due to its effectiveness and numerousapplications such as on boiler surfaces,heat pipesand the cooling of micro- electronic components.The porous layers can be manufactured by variousmethods such as machining,welding,sintering orbrazing of particles,electrolytic deposition,flamespraying,bonding of particles by plating,galvanizing,plasma spraying of polymers,metalliccoating with foa…
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Boiling Heat Transfer on Porous Surfaces with Vapor Channels |
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| Abstract: | Boiling heat transfer on porous coated surfaces with vapor channels was investigated experimentally to determine the effects of the size and density of the vapor channels on the boiling heat transfer. Observations showed that bubbles escaping from the channels enhanced the heat transfer. Three regimes were identified: liquid flooding, bubbles in the channel and the bottom drying out region. The maximum heat transfer occurred for an optimum vapor channel density and the boiling heat transfer performance was increased if the channels were open to the bottom of the porous coating. |
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| Keywords: | porous media boiling enhancement vapor channels |
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