improving performance - reverse bulbous bow principle, amplify wave near stern

Discussion in 'Hydrodynamics and Aerodynamics' started by vignesh, Oct 6, 2011.

  1. Leo Lazauskas
    Joined: Jan 2002
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    Location: Adelaide, South Australia

    Leo Lazauskas Senior Member

    It is not. Where did you get that idea from?
     
  2. rxcomposite
    Joined: Jan 2005
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    Location: Philippines

    rxcomposite Senior Member

    From here http://www.boatdesign.net/forums/hy...hull-asymmetry-minimum-wave-drag-38260-9.html

    "With pressure distributions, the equivalent of the thin-ship
    assumption is that the pressures and waves are small, i.e.
    the linearisation of the free-surface boundary condition is
    justified. The length-to-beam ratio is not really all that relevant.
    Incidentally, (inviscid) wave resistance predictions agree well
    with experiments with travelling pressure distributions,
    presumably because viscosity plays a very minor role.
    We confirmed the optimality of fore-aft pressures in:
    E.O. Tuck and L. Lazauskas
    "Free-surface pressure distributions with minimum wave resistance",
    ANZIAM Journal, Vol. 43, 2001,
    http://www.cyberiad.net/library/pdf/tl01.pdf"- Leo post 135

    Leo, I know this is your work. Please tell me where I am misinterpreting.
     
  3. Leo Lazauskas
    Joined: Jan 2002
    Posts: 2,696
    Likes: 155, Points: 63, Legacy Rep: 2229
    Location: Adelaide, South Australia

    Leo Lazauskas Senior Member

    I see where your confusion came from.
    By "pressure distributions" I mean the pressure of air cushions as in a hovercraft, not the pressure distribution on the body of a solid hull.
     

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