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http://dx.doi.org/10.6112/kscfe.2013.18.3.094

DEVELOPMENT OF CAVITATION EROSION PREDICTION METHOD AND ITS APPLICATION FOR MARINE PROPELLER  

Park, S. (Dept. of Ocean Engineering, Korea Maritime and Ocean Univ.)
Rhee, S.H. (Dept. of Naval Architecture and Ocean Engineering, Seoul Nat'l Univ.)
Publication Information
Journal of computational fluids engineering / v.18, no.3, 2013 , pp. 94-101 More about this Journal
Abstract
In the present study, a practical method to predict cavitation erosion, which caused a critical damage on hydraulic machineries, was developed. Impact and critical velocities were defined to develop a practical method for the prediction of cavitation erosion. To develope the practical method, the computational fluid dynamics (CFD) was introduced. Cavitating flows with erosion in a converging-diverging nozzle and around a hydrofoil were simulated by developed and validated code. Based on the CFD results, the cavitation erosion coefficient was derived by a curve fitting method. The cavitation erosion coefficient was formulated as the function of the cavitation and Reynolds numbers. A cavitating flow in an axisymmetric nozzle followed by radial divergence was simulated to validate the developed practical method. For the application to a propeller, a cavitating flow around a propeller was simulated. Predicted damage extent showed similar with damaged full-scale propeller blade.
Keywords
Cavitation; Cavitation Erosion; Computational Fluid Dynamics;
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