BOILING OF A LIQUID ON MICROSTRUCTURED SURFACES UNDER FREE-CONVECTION CONDITIONS

The authors have shown the possibilities of replacing complex and expensive technologies of manufacture of nanorough, microrough, and porous materials for boiling surfaces by a simple and resource-saving technique of mechanical treatment of surfaces: by the strain-cutting method. It has been established that the maximum levels of heat-transfer intensifi cation (as high as four to six times) during the boiling of distilled water and increase (of six times) in the critical heat fl uxes are inherent in surfaces obtained by the strain-cutting method with three-dimensional microfi nning with spacings of width 120–180 μm at a height of fi ns of 340–570 μm and their longitudinal spacing of 240–400 μm.
The authors have shown the possibilities of replacing complex and expensive technologies of manufacture of nanorough, microrough, and porous materials for boiling surfaces by a simple and resource-saving technique of mechanical treatment of surfaces: by the strain-cutting method. It has been established that the maximum levels of heat-transfer intensifi cation (as high as four to six times) during the boiling of distilled water and increase (of six times) in the critical heat fl uxes are inherent in surfaces obtained by the strain-cutting method with three-dimensional microfi nning with spacings of width 120–180 μm at a height of fi ns of 340–570 μm and their longitudinal spacing of 240–400 μm.
Author:  A. V. Shchelchkov I. A. Popov and N. N. Zubkov
Keywords:  boiling, intensifi cation, critical heat fl ux, microstructured surface
Page:  1152