Some Numerical Results on Current Research
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  • Some Computational Results on Propulsion Systems

    Fig. 1_A: Azipod Propulsion System on Real Ship
    Fig. 2_A: Typical Model for Speed-Z System
    Fig. 3_A: Twin Podded Propulsors (Ref.)
    Fig. 4_A: Schematic of Conventional and Podded propulsion Systems
    Fig. 5_A: Panel Arrangement of Different Propeller Models
    Fig. 6_A: Paneling on Propeller-Rudder System (Conventional Propulsion)
    Fig. 7_A: Paneling on Azipod Propulsion System
    Fig. 8_A: Basic Formula on Present BEM
    Fig. 9_A: Main Dimensions of Propeller and Steering Models
    Fig.10_A: Open Water Characteristics (OWC)
    Fig.11_A: Pressure Distribution on Strut/Flap
    Fig.12_A: Pressure Distribution on Pod
    Fig.13_A: Hydrodynamic Performance on Conventional Propulsion System
    Fig.14_A: Hydrodynamic Performance on Podded Propulsion System
    Fig.15_A: Induced Velocity on Rudder Surface
    Fig.16_A: Comparison of Velocities behind the Propeller
    Fig.17_A: Induced Velocity at Rudder Stock Position behind the Propeller
    Fig.18_A: Induced Velocity behind the propeller in front and behind the Propeller

  • Cavitation Prediction on Hydrofoils and Propellers

    Fig. 1_C: Cavitation Phenomenon
    Fig. 2_C: Cavity Shape on Hydrofoil (Closed Type)
    Fig. 3_C: Cavity Shape on Hydrofoil (Open Type)
    Fig. 4_C: Comparison of Cavity Planform on Hydrofoil
    Fig. 5_C: Axial and Cross Velocity around Hydrofoil
    Fig. 6_C: Pressure Distribution on Cavitating Hydrofoil
    Fig. 7_C: Lift and Drag Coefficient for Cavitating Hydrofoil
    Fig. 8_C: Propeller Model, OWC
    Fig. 9_C: Comparison of Pressure distribution at J=0.5 (Cavitating and Non-Cavitating)
    Fig.10_C: Comparison of Pressure distribution at J=0.7 (Cavitating and Non-Cavitating)

  • Unsteady Propeller Imposed by Wake Flow

    Fig. 1_P: Non-Uniform Wake Flow to the Propeller
    Fig. 2_P: Non-Uniform Wake Flow on the propeller Element,
    Fig. 3_P: Non-Dimensional Circulation during on Cycle,
    Fig. 4_P: Pressure distribution on CP
    Fig. 5_P: Pressure distribution on HSP
    Fig. 6_P: Fluctuating Pressure for Seiun-Maru HSP at 0.7R and 0.9R
    Fig. 7_P: Thrust and Torque Fluctuation during on Cycle
    Fig. 8_P: Induced Velocity on Propeller Surface at Non-Uniform Flow
    Fig. 9_P: Induced Velocity at downstream position.

  • It is shown a simple Trailing Vortex Wake behind the propeller (magic!).

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