Forced convection film boiling heat transfer on a vertical cylinder. 2

It was clarified in Part (1) of this paper that the film boiling heat transfer coefficients on a vertical cylinder in forced flow of saturated water, and saturated and subcooled R113 at pressures were almost independent of flow velocity and of a vertical position on the cylinder for the velocities lower than about 1 m/s (the first range), and they become higher for the velocities higher than 1 m/s (the second range). In this paper, a generalized film boiling heat transfer correlation for the first and second ranges including radiation contribution was derived. It was confirmed that the experimental data of film boiling heat transfer coefficients in water and R113 were described by the correlation within ±20% difference. (author)