Hydrodynamic analysis of the surface-piercing propeller in unsteady open water condition using boundary element method

  • Yari, Ehsan (Amirkabir University of Technology, Department of Ocean Engineering) ;
  • Ghassemi, Hassan (Amirkabir University of Technology, Department of Ocean Engineering)
  • Received : 2015.06.25
  • Accepted : 2015.09.15
  • Published : 2016.01.31


This article investigates numerical modeling of surface piercing propeller (SPP) in unsteady open water condition using boundary element method. The home code based on BEM has been developed for the prediction of propeller performance, unsteady ventilation pattern and cross flow effect on partially submerged propellers. To achieve accurate results and correct behavior extraction of the ventilation zone, finely mesh has generated around the propeller and especially in the situation intersection of propeller with the free surface. Hydrodynamic coefficients and ventilation pattern on key blade of SPP are calculated in the different advance coefficients. The values obtained from this numerical simulation are plotted and the results are compared with experiments data and ventilation observations. The predicted ventilated open water performances of the SPP as well as ventilation pattern are in good agreement with experimental data. Finally, the results of the BEM code/experiment comparisons are discussed.



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