Stern wave - reduction in wave making resistance

Discussion in 'Hydrodynamics and Aerodynamics' started by anuprdk, Jun 25, 2020.

  1. anuprdk
    Joined: May 2018
    Posts: 9
    Likes: 0, Points: 1
    Location: india

    anuprdk Junior Member

    Hi

    I am modelling a dump barge that has dimensions 72 x 18 x 2.8 m in 2 m water at 1.4m draft. CFD simulations show the squat and trim of the vessel within acceptable limits but the trough wave at the stern is around 1 m compared to 0.7 m in forward. Consequently, the viscous pressure resistance and wave making resistance at the stern is on a higher side than at the forward. Please advise on how to reduce this without altering the length of the barge.
     

    Attached Files:

  2. gonzo
    Joined: Aug 2002
    Posts: 14,560
    Likes: 684, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    What is the shape of the barge?
     
  3. bajansailor
    Joined: Oct 2007
    Posts: 1,305
    Likes: 377, Points: 83, Legacy Rep: 37
    Location: Barbados

    bajansailor Marine Surveyor

    +1 re Gonzo's question - is the barge a rectangular brick with a bit of rake at the fore and aft ends, or a bit more streamlined?

    Are you really towing it in only 2 metres of water depth and a draft of 1.4 metres, thus giving a clearance under the keel of only 0.6 metres?
     
    jehardiman likes this.

  4. jehardiman
    Joined: Aug 2004
    Posts: 2,799
    Likes: 363, Points: 83, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    You know bad powering/sailing/maneuvering vessels are called a "barge" for a reason....right? That's what you get when you use a barge hull form. And water depth to draft isn't helping you any which is the reason for the high stern wave....have you ever looked at shallow water squat?
     
    bajansailor likes this.
Loading...
Similar Threads
  1. vignesh
    Replies:
    32
    Views:
    6,973
  2. Will Fraser
    Replies:
    13
    Views:
    1,793
  3. makobuilders
    Replies:
    5
    Views:
    1,100
  4. James Stone
    Replies:
    2
    Views:
    853
  5. Lewardsail
    Replies:
    2
    Views:
    1,104
  6. manishindian979
    Replies:
    5
    Views:
    2,043
  7. djaus
    Replies:
    17
    Views:
    2,810
  8. Bilgerat
    Replies:
    6
    Views:
    3,176
  9. Leo Lazauskas
    Replies:
    6
    Views:
    5,171
  10. Surfer Naval Architect
    Replies:
    4
    Views:
    277
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.