C121 ハニカム多孔質体装着による飽和プール沸騰CHF向上に与える毛管力の影響(OS9 熱・流動(3))

抄録

The critical heat flux (the CHF) in saturated pool boiling of water was investigated experimentally under the attachment of a honeycomb porous plate on the heated surface In the previous study, the CHF was shown experiment ally to be enhanced to more than twice that of a plain surface The CHF enhancement is caused by the automatic liquid supply due to capillary action and the reduction of the vapor escape flow resistance due to separation of liquid and vapor flow by the honeycomb porous structure In this paper, a simplified one-dimensional capillaiy limit model, in which the pressure drops caused by liquid and vapor flow through a honeycomb porous plate is balanced by capillary force, is applied to predict the CHF The calculated results are compared with the observed ones obtained from simplified experiments which extract the capillary action effect only