Author(s): Anatolij R. Karev; Masoud Farzaneh; Laszlo Kollar; Sandy Vaslon
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Abstract: The thermal structure of an experimentally modeled ice accretion with a water film in an icing wind tunnel is investigated here at both inner and outer interfaces using nondestructive remote sensing techniques and traditional thermometry. The water film developing into rivulets was produced by spraying of an aerosol flow from a single water-dispersing nozzle cloud onto the iced bottom of a thermally insulated channel. The water film was then driven by a concurrent air flow at negative temperatures. The shear-driven water film thus created was thereby forced to freeze from below due to convection and evaporation from its surface. Heat conduction lengthwise along the bottom of the channel and perpendicular to it was controlled by measuring the outer surface of the bottom of the channel at several sites. The surface temperature of the flowing water film developing into rivulets, as measured by infrared camera, was found to be negative throughout all the experiments.
Year: 2004