プール沸騰に関する研究 : 第8報, 遷移沸騰領域における液膜厚さ

抄録

Macrolayer thickness in transition boiling was determined from the energy balance relation q<tr>^^-=ρ_lH_fgδ_l·f, based on measurements of q<tr>^^- (time averaged heat flux in transition boiling) and f (detachment frequency of coalesced bubbles) for water and ethanol boiling on vertical and horizontal surfaces 15mm in diameter under atmospheric pressure. The macrolayer thickness for the vertical surface agreed well with the correlation proposed in the 7th report in this series, when heat flux at macrolayer formation is given on nucleate boiling curve extrapolated to the superheat of transition boiling. For the horizontal surface the macrolayer was apparently thick due to the in flow of bulkliquid beneath growing vapor masses.