プール沸騰に関する研究 : 第2報, 核沸騰伝熱の相関式と核沸騰曲線の推算法

抄録

A new correlation consisting of heat flux q, superheat ΔT_sat, density of nucleation sites n and a group of physical properties is proposed for the coalesced bubble region, based on a model where the heat conduction and the liquid flow induced by bubble growth are dominant mechanisms in the heat transfer. The new correlation of heat transfer arranges well the experimental data from the isolated bubble region to the coalesced bubble region obtained for various combinations of liquids and heating surfaces of upward flat plates at pressures of 0.04MPa to 0.1MPa. The correlation is used to calculate the relations of n-ΔT_sat from the experimental data of q-ΔT_sat. The generalized correlation consisting of n, ΔT_sat, Physical properties and surface characteristics is derived and combined with the new correlation of heat transfer in order to predict boiling curves. The predicted results agree well with the experimentally obtained boiling curves from various sources for a wide range of boiling conditions.