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[BladeModeler] Bladegen Radial Impeller Wrap Angle - Help Required

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Old   September 20, 2015, 13:40
Default Bladegen Radial Impeller Wrap Angle - Help Required
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Suraj Kashyap
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I am doing some reverse engineering on a centrifugal impeller (shrouded, image attached). To generate the geometry for meshing, I am using Bladegen, but I ran into a couple problems.
  1. In the Initial Angle/Thickness Dialog box (image attached), what is the angle asked for? Is it the wrap angle or the vane inlet angle (beta). If it is the wrap angle, is it the one at the hub or that at the shroud as that is different in my case?
  2. I have attached an image of the projection of the blade curve on the hub floor (image attached). Since the blade has considerable thickness, I am confused as how to measure the wrap angle. A and B are points on the vane inlet and exit on the pressure side and C and F are those on the suction side. B and E are the median points. Which points should I take to find out the wrap angle?

Thanks a lot in advance!!
Attached Images
File Type: jpg Bladegen_Dialog_Box.JPG (34.8 KB, 12 views)
File Type: jpg Vane_Curve_Projection.JPG (60.0 KB, 9 views)
File Type: jpg Impeller_Sectional_View.JPG (48.6 KB, 9 views)
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bladegen, centrifugal impeller, theta, turbogrid, wrap angle

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