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Spray and Ice Measurement Instrumentation for Ships

by Charles C. Ryerson, USA Cold Regions Research and, Engineering Lab, Hanover, United States,
Michael R. Walsh, USA Cold Regions Research and, Engineering Lab, Hanover, United States,
Kurt V. Knuth, USA Cold Regions Research and, Engineering Lab, Hanover, United States,



Document Type: Proceeding Paper

Part of: Cold Regions Engineering

Abstract:

Bow slamming is the primary water delivery mechanism for ship superstructure icing. Spray flux is largely dependent upon hull dynamics, and cannot be computed numerically with current understanding of hydrodynamic processes. Therefore, ship icing models must rely upon empirical algorithms for water delivery. The Cold Regions Research and Engineering Laboratory has developed an instrumentation system that automatically measures spray flux and ice growth for use in icing forecast model development and validation. Though the spray measurement system is similar in concept to a rain gauge and the ice measurement system is similar to an ultrasonic camera rangefinder, the systems are more complex because of their need to operate reliably on a ship deck in heavy weather. This paper describes the design, testing, construction, and fielding of this equipment.

Subject Headings: Ships | Ice | Flow measurement | Construction equipment | Cold region construction | Urban and regional development | Superstructures

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