Accession Number : ADP001676

Title :   Adhesion of Ice on Aluminum Conductor and Crystal Size in the Surface Layer,


Personal Author(s) : Laforte,Jean-Louis ; Phan,C. Luan ; Felin,Beatrice ; Martin,Richard

Report Date : JUN 1983

Pagination or Media Count : 9

Abstract : Ice accretions of various densities are formed in a wind tunnel on an aluminium cylinder of 3.15 cm diameter. Environmental growth conditions cover the range of icing intensity and ambient temperature which prevail normally in field at situations with glaze and hard rime storms on actual power line conductors. Density, ice crystal dimensions and adhesive strength in brittle conditions of deformation are measured. From the experimental results obtained, it is found that the adhesion of atmospheric ice on a metallic surface depends on its internal structure, mainly the porosity which is related to the density of ice accretion. The adhesive strength depends also upon the mean crystal width in the boundary layer near the conductor surface.

Descriptors :   *Ice, *Ice formation, *Adhesion, *Transmission lines, *Cold weather tests, Electric conductors, Wind tunnel tests, Cylindrical bodies, Aluminum, Particle size, Accumulation, Atmospherics, Meteorological data, Surface analysis, Predictions

Distribution Statement : APPROVED FOR PUBLIC RELEASE