下向き水平円形伝熱面のプール膜沸騰熱伝達

概要

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The two-dimensional, steady, pool film boiling heat transfer from a horizontal circular plate facing downward to a stagnant saturated liquid is studied theoretically on the basis of the assumption that the liquid-vapor interface is smooth and radiation can be disregarded. The relevant governing equations for the vapor film are solved for water at atmospheric pressure using two-equation boundary-layer integral method. It is shown that the dimensionless temperature profile is affected by the wall superheat ΔT_<sat> and that a ratio of Nu to X^<0.2> an increasing function of ΔT_<sat>. Here, Nu represents the mean Nusselt number and X the film-boiling Rayleigh number. In addition, it is revealed that one-equation boundary-layer integral method developed by Nishio et al. is fairly accurate in predicting the film thickness, the representative radial velocity and the mean Nusselt number.
一般社団法人日本機械学会の論文
1999-09-25