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Imporving lift of an airfoil

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Old   September 3, 2020, 04:55
Post Imporving lift of an airfoil
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Sahil Parashar
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Me and my friends recenty learned Ansys FLuent and are trying to increase the lift generated by a standard airfoil by modifying the profile.
I have attached the original
and the modified profile

We did two simulations and used the following solver settings:
Model : Spalart
Method : Simple
Inlet velocity : 7m/s and 0.1 m/s(for the second simulation)

In case of First simulation(7 m/s inlet air) we got an improved drag(less than original) and improved lift (more than original) but for the second case (0.1 m/s) we got exact opposite results, i.e. lift and drag both were worse.

If anyone has any ideas where we might be going wrong are welcome to help.

Thank you
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File Type: png Screenshot (4).png (7.5 KB, 4 views)

Last edited by mindprobe101; September 3, 2020 at 07:44.
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Old   September 3, 2020, 11:24
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It all depends if at different air speeds you get flow separation.
If you post pics. of the velocity contours it will be possible to tell.
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airfoil, airfoil 2d, airfoil analysis, airfoil lift, drag and lift

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