Air flow analysis

Aerodynamic design is particularly important for high speed craft. Specific design considerations are

  • Vessel performance (forces, moments, windage)
  • Structural (wind loads on superstructures)
  • Ship Helicopter Operating Limits (SHOL)
  • Occupant safety and comfort, including local wind effects on passengers, exhaust gas, and cabin ventilation)
  • Engine room and cargo holds ventilation

Velocity contours on vertical cuts; 5m aft of the bow

at 20m aft of the bow

at 30m aft of the bow

Velocity contours on a centreline cut

Velocity contours on a horizontal cut (2m ab. wl.)

Velocity contours on a horizontal cut (2.5m ab. wl.)

Streamlines

 

Mass fraction of exhaust gas 5s after engine start.

Exhaust gas propagation. (showed by isoline of gas mass-fraction = 0.5)