Page History

...

In the following video we show you how to import this file and we explain important features of this geometry.

...

Body Transformations

In this video, we show you how to correctly orient the blade given the pitch angle specification and we show you how to translate the blade so that the global axis becomes at center of rotation (center of hub). 

{html}<iframe width="640" height="360" src="//www.youtube.com/embed/9SpWsfH7Occ" frameborder="0" allowfullscreen></iframe>{html}

Summary of steps in the above video:

1. Rotation of the blade
   1. Select body transformation -> rotate
   2. For Bodies, select the blade part (it select all surface bodies in that part)
   3. Axis Selection: x-axis, make it point in the positive direction, display plane first
   4. Angle is -70 degrees for it to be straight, be we want 4 degree offset at the tip so let’s put -66 degrees
2. Translate so that global coord. is at the middle of the root
   1. Translate, choose our blade part for the bodies
   2. Direction definition: Coordinates
   3. Try to put it at the center, I found 0.9 in the y and 0.6 in the z to work well for this case.
3. Translation for hub
   1. Select the whole blade,
   2. Translation of 1m in the –x direction to account for hub

...

Defining the Blade Volume

In the following video, we close off all opening then make a solid body to represent the volume of the blade, out of the current surface bodies. 

{html}<iframe width="640" height="360" src="//www.youtube.com/embed/EC4gScJ-Pxg" frameborder="0" allowfullscreen></iframe>{html}

Summary of steps in the above video:

1. Closing the surfaces
   1. Create Surface from edges at the root to close this opening off
   2. Select this surface and all surfaces under part 5 and click form new part
2. Making a copy of our blade surface bodies to use later for the FEA.
   1. Translate
      1. Change preserve bodies to yes
      2. Select all blade bodies (10)
      3. Select any direction but specify the distance to be zero.
      4. We now have two blades, rename this new blade, Blade FEA. Supress the root surface from this blade (can hide the CFD Blade first). Hide Blade FEA
3. Sew
   1. Suppress the spar bodies for Blade CFD (hide the part then show which ones are the spar)
   2. Body operation, Sew and choose only the outside surfaces.
   3. For create solid, click yes. Solid is created. 

...

Drawing the Fluid Volume

We now draw the fluid volume. 

{html}<iframe width="640" height="360" src="//www.youtube.com/embed/mOGunpQL-00" frameborder="0" allowfullscreen></iframe>{html}

...

Creating the Fluid Volume

Finally, we do a Boolean subtraction to remove the blade volume from the fluid geometry. 

{html}<iframe width="640" height="360" src="//www.youtube.com/embed/05vgSbkJnJU" frameborder="0" allowfullscreen></iframe>{html}

...