USING VLM.EXE TOOL
By José Pablo Luna Sánchez. 2008
VLM tool uses a simplified aerodynamic model to calculate the aerodynamics of a wing.
The tool was made by Aeromech USyd.edu.AU and it can be distibuted for free.
When you have a wing configuration, you may need several dimensions.
The remaining data that the tool will ask you refers to:
STEPS
After you press Create, it looks like this
After you press Solve, data is displayed.
CL refers to the formula to calculate lift coefficient, using Alpha (angle of incidence of the entire wing)
CM refers to Moment Coefficient.
CD refers to drag coefficient. To obtain CD for a zero AoA, just use Alpha = 0.
MAC refers to Mean Airfoil Chord.
Since the wing is not rectangular, chord is not constant along the wing, and it must be calculated as a mean chord length.
AR refers to Aspect Ratio.
After pressing Pressure, it looks like this.
Move the Angle of Attack slide and you may see how pressure affects different parts of the wing.