70 lines
2.4 KiB
Plaintext
Executable File
70 lines
2.4 KiB
Plaintext
Executable File
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**********************************************************************
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STRUT
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**********************************************************************
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Using the strut fitting program
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-------------------------------
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Make sure that all the .m files are in the same directory. Your
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airfoil coordinate files do not have to be in the same directory.
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Make sure that the first line in the airfoil coordinate file is not
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the name of the airfoil, i.e. only numbers are allowed in the file.
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Also make sure the coordinates are sorted TE-LE-TE and that the
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leading edge point (usually 0,0) is not repeated. This is important,
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since it is easy to forget to remove the extra point if you sorted the
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coordinates with a spreadsheet such as MS Excel.
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Start Matlab.
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Change the directory to the directory with the .m files. Use the "cd"
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command in Matlab to do this.
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Run the GUI by typing "strut".
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Now you can load an airfoil by clicking on the "load" button. Simply
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choose the file. After loading the filename of the current airfoil,
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the name of the filename will appear in the box below the "load"
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button.
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The size of the strut can be changed by changing the values for
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"length" and "width". "Length" is the distance in the chordwise
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direction. Units do not matter. You can also change the default
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values by editing the "default.dat" text file.
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Click on "calculate", wait a couple of seconds and the information for
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the fitted airfoil should appear in the three remaining boxes. The
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values are:
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scale - How much you must enlarge the airfoil to fit over the box.
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xLE% - Chord percentage where the leading edge of the strut is located.
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xLE - Actual distance from the LE of the airfoil to the LE of the
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strut.
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Notes:
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------
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The program will not converge for low aspect ratio struts in very thin
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airfoils. It should however work for all practical cases for the AE
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416 homework assignment.
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**********************************************************************
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Development Notes
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**********************************************************************
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1) Matlab program for sizing airfoils to fit over a rectangular
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strut written Sept 1999 by
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B.A. Broughton
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Graduate Student
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Applied Aerodynamics Group
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Dept. of Aerospace Engineering
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University of Illinois at Urbana-Champaign
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2) Minor fixes/updates/changes by Selig 090925
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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