Erosive impact intensity of cavitation generated by a model propeller in water tunnel flows is related to specific off-design conditions that a propeller experiences in a ship's wake. Uniform velocity flows were used so that effects of off-design conditions could be separated form effects of cavitation dynamics introduced by periodic rotation through the wake. Erosive impact intensity was measured by the size and rate of formation of pits formed on the polished blades by impact of loads created by collapse of cavitation bubbles. Information is also presented on the evaluation as erosion resistant coverings for propellers, of five polyurethane formulations developed by Bell Aerospace Textron and thirteen commercial materials applied by seven suppliers. This laboratory evaluation included cavitation erosion resistance of the coverings and lap shear strengths of their bonds to ABS Type 4 bronze before and after 6 months immersion in salt water.
An investigation of methods to reduce or eliminate cavitation erosion ship propeller
Untersuchung der Methoden zur Minderung oder Verhuetung der Kavitationskorrosion an Schiffsschrauben
US Government Reports ; Jun ; 1-104
1977
104 Seiten
Report
Englisch
Ship propeller for preventing erosion caused by cavitation
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