Turbulent Heat Transfer of a Gas flow on an Evaporation Liquid Surface

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概要

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• An experimental study has been made on a turbulent heat transfer of air flow on an evaporating water surface in two cases : the case of heating a water surface with a flow of hot air and the case of cooling a water surface of high temperature with a flow of cold air. Heat transfer on the water surface is found to be higher, in both cases, than that on the solid surface. Then, a comparison between experimental and theoretical value is attempted on the equilibrium temperature of water surface, clarifying that the analogy is nearly established between heat and mass transfer within a turbulent boundary layer on a water surface. Velocity distribution in turbulent boundary layer is also measured, and it is found that the velocity profile on a water surface is different to some extent from that on a solid surface. Measured temperature fluctuation in a turbulent boundary layer reveals that the fluctuation is considerably greater than that in a boundary layer on a solid surface. The results afore-mentioned mean that the increase of heat and mass transfer occurs due to a rise of turbulence in a turbulent boundary layer on an evaporating liquid surface. However, the mechanism of the increase of turbulence has not yet been revealed.

• 一般社団法人日本機械学会の論文

著者

• Koizumi Hideo

  Faculty Of Engineering University Of Tokyo.

• KATTO Yoshiro

  Faculty of Engineering, University of Tokyo.

• YAMAGUCHI Tatuo

  Faculty of Engineering, University of Tokyo.

• Katto Yoshiro

  Faculty Of Engineering University Of Tokyo

• Katto Yoshiro

  Faculty Of Engineering University Of Tokyo.

• Yamaguchi Tatuo

  Faculty Of Engineering University Of Tokyo.

関連論文

• Turbulent Heat Transfer of a Gas flow on an Evaporation Liquid Surface
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• Thermal Onset of Oscillation in a Pipe Containing Heat Sources
• Study of Critical Flow : Completely Separated Gas-Liquid Two-Phase Flow
• Dynamics of Compressible Saturated Two-Phase Flow : Critical Flow
• Nucleate and Transition Boiling in a Narrow Space between Two Horizontal, Parallel Disk-Surfaces
• Peculiarity of Evaporating Liquid-Surface with Reference to Turbulent Heat Transfer
• Dynamics of Compressible Saturated Two-Phase Flow : Critical Flow-sequel, and Flow in a Pipe
• Study of the Mechanism of Burn-Out in Boiling System of High Burn-Out Heat Flux

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