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  1. alipourzand01

    Air velocity and stall angle...

    Thanks everybody. So unlike what i used to think the stall angle is actually dependent on air velocity, which proves my results were correct. (higher speed , the higher stall angle). and RE is propotional to velocity so higher velocity the higher RE. is that correct?
  2. alipourzand01

    Air velocity and stall angle...

    Thanks my friend, it seems everyone having a same opinion regarding the stall angle and velocity, but I still can't understand how is that possible. I mean yeah lift is directly related to velocity but I can't see how this change in speed could change the stall angle. It's happening and...
  3. alipourzand01

    Air velocity and stall angle...

    Thanks Amin but the wind tunnel was calibrated 2 days before i take the test by a professional so I assume there was no flow deflection. However I keep that in mind and check it out again. Disgruntleddave Thanks for the reply it seems you are confirming my outcome regarding the increase in...
  4. alipourzand01

    Air velocity and stall angle...

    Thanks CrystalClear :) I will do some more research on relationship between a Stall angle and the air velocity, but what you saying does make sence to me. about my second issue. I'm not sure exactly what you mean. Do you mean at higher AoA the air hitting the bottom of the aerofoil would...
  5. alipourzand01

    Air velocity and stall angle...

    Hello; I'm testing an aerofoil in a wind tunnel to see the stall angle and effect of vortex generators. 1 - I'm using a NACA 6313 aerofoil, when testing it in my company's low-speed when tunnel (when it's plain i.e. no VG's on it) at low air velocity (25 m/s) the aerofoil stall at 13 degrees...

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