3 Replies Latest reply on Jun 5, 2014 6:57 PM by Jared Conway

    Looking for airfoil analysis improvements

    Arman Maralan

      Hi,

       

      I use Solidworks 2014 Flow Simulation SP3. I need to improve my CFD analysis about airfoils. Please let me explain what I do first.

       

      • Switch to CGS units
      • Maximize resolutions in Image quality settings
      • I grab an airfoil data from web. Import curve with "Curve thorugh XYZ"
      • Using front plane, I create the an entity
      • I scale entity to a value ( 6cm for this project )
      • I rotate entity for 3 degree angle of attack
      • I use extrude boss/base to make the span 60 cm ( blind )

       

      airfoil.jpg

       

      • I use flow simulation wizard tool
      • Change m/s to km/h
      • External analysis, ref axis X, everything else unchecked
      • Laminar/Turbelent Air with Humidity
      • Adiabatic Wall, 0 microns
      • Pressure/temperature 101325 Pa 293.2 K, 3D Vector Velocity, X direction 85 km/h, %10 humidity, everything else default
      • Resolution 8, only optimize thin walls resolution checked ( I change initial mesh later )

       

      This is my computational 2D domain, Z is full span length ( 60cm )

       

      domain.jpg

       

      Mesh details

       

      meshAll.jpg

      meshDetail.jpg

      meshSettings.jpg

       

      I make the airfoil face a real wall ( Boundry Conditions )

       

      realWall.jpg

       

      Force X ( Drag ) and Force Y ( Lift ) selected as global goals with "Use for convergence control"

       

      I click solve. It takes some time because my workstation is not very powerful. This is how I calculate lift and drag. I don't know why but I get low lift and drag values, about %20 of expected. I will appreciate any help to improve the results. Thanks.