Error data !

- April 11, 2023 at 10:43 pm
  
  bilal ojaily
  Subscriber
  
  Hello everyone !
  I am working to analyse NACA 63(4)-421 wing in different angle of attacks by DesignPoints, but I have some problems if you could help me in this plese?
  
  Firstly, CL is increase untile 40 degree and I do not have CLmax
  Secondly, I have a negative drag in some angles, but that is impossible
  Thirdly, in the past by contours I could saw ripple flow, but now there are problems I can not find it
  Could you help me please?
  Thank you.
- April 12, 2023 at 8:35 am
  
  SRP
  Subscriber
  
  Hi,
  I suggest please check ansys innovation course on airfoil which will help to understand what is the best practise use to model airfoil: Flow over an Airfoil - ANSYS Innovation Courses
  Thank you
- April 12, 2023 at 2:21 pm
  
  bilal ojaily
  Subscriber
  
  Ok, thank you very much mr. SRP
  I will check it

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