PREDICTION OF CAVITATION ON SHIPS

[摘要] The emphasis of this paper is on challenges in simulation of cavitating flows, especiallyflows around propeller and rudder. First the sources of errors in predictions based onComputational Fluid Dynamics (CFD) are highlighted: the accuracy of geometry, grid qualityand fineness, turbulence modeling and cavitation modeling. The interaction between errorsfrom different sources is also discussed. The importance of turbulence in the flow upstream ofpropeller and the difficulty of accounting for it is described next. Special attention is paid tothe prediction of tip-vortex cavitation and to scale effects. Results from simulations arecompared to experimental data from SVA Potsdam, except for the full-scale analysis of flowaround hull, propeller and rudder, for which no experimental data is available. It is concludedthat cavitation can be predicted to a degree which makes simulation an indispensable tool fordesign and optimization of maritime vessels.

[学科分类] 工程和技术（综合）

[关键词] simulation;flow;propeller;cavitation