有限の下向き水平面から飽和液体への膜沸騰熱伝達

概要

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An analysis is made for two-dimensional, steady-state film boiling heat transfer from a finite-size, isothermal, horizontal plate facing downward to a stagnant saturated liquid, including the effect of the plate edge and contribution of radiation heat transfer. The laminar boundary-layer equations for the flow of vapor beneath the heated plate are solved using an integral method and the solution is obtaind analytically. Numerical results of the solution are examined for saturated water at atmospheric pressure. It is shown that (1) the vapor film has a maximum thickness at the center of the plate and that its thickness decreases towards the edge. The vapor film becomes thicker with an increase of the plate width or of the degree of superheating, (2) the convection heat transfer is strongly affected by the plate width, and (3) the radiation heat transfer and its contribution to the convection heat transfer can not be neglected when the degree of superheating is large.
一般社団法人日本機械学会の論文
1988-07-25