Stern Flap Design

Discussion in 'Hydrodynamics and Aerodynamics' started by manishindian979, Jan 27, 2015.

  1. manishindian979
    Joined: Feb 2012
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    Location: Kochi, India

    manishindian979 Junior Member

    Hey guys. Can you suggest me some papers or books where I can find the design techniques for stern flaps for energy saving?
     
  2. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    Do you mean "trim tabs"?
     
  3. TANSL
    Joined: Sep 2011
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    TANSL Senior Member

    I think not. I think what he means is: "stern flaps for energy saving". It is similar but not the same.
     

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  4. Mr Efficiency
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    Mr Efficiency Senior Member

  5. CDBarry
    Joined: Nov 2002
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    Location: Maryland

    CDBarry Senior Member

    Here is some material relating to the use of stern flaps on USCG 110' cutters:

    U.S. Coast Guard Island Class 110 WPB: Stern Flap Evaluation and Selection (Model 5526) - NSWCCD Report - www.dtic.mil/dtic/tr/fulltext/u2/a372316.pdf

    Hydrodynamic Efficiency Improvements to the USCG 110 Ft WPB ISLAND Class Patrol Boats
    http://www.sname.org/communities1/r...umentKey=92510f58-0487-4305-9bef-576a096a1ce5
    SNAME Annual Meeting Paper (also on 1st SNAME small craft CD)

    www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA400106

    There is also a paper that was given at the WorkBoat show by Dominic Cusanelli covering the subject for a range of ship types, and a similar Professional BoatBuilder article, but I can't find the links.

    So far it appears that either model tests or high level CFD is required.
     
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  6. manishindian979
    Joined: Feb 2012
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    Location: Kochi, India

    manishindian979 Junior Member

    Thanks to all of you. But I have read all these articles. I still am not able to understand the thickness requirements. Might be some CFD analysis can reveal the facts. I still don't think that root thickness will be playing any major role. However the shape of the cross section may do that. Can you guess if am right or going drastically wrong?
     
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