AnsweredAssumed Answered

Looking for airfoil analysis improvements

Question asked by Arman Maralan on Jun 5, 2014
Latest reply on Jun 5, 2014 by Jared Conway

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.

Outcomes