wing software

Discussion in 'Hydrodynamics and Aerodynamics' started by Rockdamned, Nov 22, 2011.

  1. Rockdamned
    Joined: Nov 2010
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    Location: Roma

    Rockdamned Junior Member

    Hi everybody! I'm working with a university team on a skiff, and we need to check and analyze some wing sections for centerboard, rudder and stuff.

    We use gambit and fluent to analyze, usually, but we haven't got a software that designs NACA wing profiles. Well, to be honest we do have one, but the points it gives are not enough for gambit, which cannot fill all the points in a curved line.

    I hope you understand what i mean (my english is getting worst everyday :( ), can you suggest us a software useful for us?

    Thank you all!!
    Edoardo

    Università La Sapienza di Roma Sailing Team
     
  2. Leo Lazauskas
    Joined: Jan 2002
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    Location: Adelaide, South Australia

    Leo Lazauskas Senior Member

    The equations for NACA 4-digit and 5-digit airfoils are on wiki.
    http://en.wikipedia.org/wiki/NACA_airfoil

    You can get as many points as you like for Gambit.

    Of course, because it is on wiki, you will have to check that the equations are correct :)

    Good luck with your project!
    Leo.
     
    Last edited: Nov 22, 2011
  3. DCockey
    Joined: Oct 2009
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    Location: Midcoast Maine

    DCockey Senior Member

    The equations for NACA four and five digit wing section profiles are available online, Wikipedia for example, and can be used to calculate points where ever the points are needed. Put the equations in a spreadsheet or write a simple program to do the calculations.

    Later sections do not have equations for the profiles but the ordinates are also available. Interpolation is needed for points in between.

    http://www.pdas.com/avd.html
     
  4. Rockdamned
    Joined: Nov 2010
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    Location: Roma

    Rockdamned Junior Member

    Thank you guys. The question that immediately comes out is: how do I put the equations in Gambit?

    Do you know any kind of software that gives the discretization?

    Thank you again,
    Edoardo

    Università La Sapienza di Roma Sailing Team
     
  5. DCockey
    Joined: Oct 2009
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    Location: Midcoast Maine

    DCockey Senior Member

    Excel

    Create a spreadsheet. Put the x values in one column, then use the appropriate equation to generate the corresponding y values. Third column with the z value. Save the results in CSV format and most software will take the file as input of a series of points. If required add lines with additional information as needed.
     
  6. Tim B
    Joined: Jan 2003
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    Location: Southern England

    Tim B Senior Member

    Write a program to calculate the points.
    Output your points in the requisite format.
    Import into Gambit.

    This is not a big thing to do, but (I think) if you want to do these sort of tasks regularly that it is good practice to get into writing these tools. There are loads of freely available languages, compilers and tutorials, and it really doesn't take much effort to learn enough to write the tool you need.

    Tim B.
     

  7. Rockdamned
    Joined: Nov 2010
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    Location: Roma

    Rockdamned Junior Member

    Thank you, we'll try :D
     
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