Author(s): G. S. H. Lock
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Keywords: No Keywords
Abstract: The paper presents the results of an experimental study of saline spongy ice accretion undertaken in a large, vertical wind tunnel. Using a concentration of sea salt equal to the mean value of that in the ocean, a spray was directed normal to a disc to create a stagnation flow. Air speed and temperature were both varied in the range attributed to structural icing in the marine environment. The data reveal two growth regimes. At lower air temperatures, a "mushy" accretion was observed while a "columnar" accretion appeared at air temperatures closer to the equilibrium freezing temperature. Measurements of ice fraction revealed low values which decreased further below fresh water values with increasing air temperature. Measurements of ice growth indicated a linear form in the "mushy" regime but a logarithmic form in the "columnar" regime.
Year: 1990