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Lofting airfoil sections with twist and changing chord length

Question asked by Shane Smith on Oct 30, 2014
Latest reply on Oct 31, 2014 by Jamil Snead

Hello,

 

For my senior design project my group is designing a wind turbine. I've been trying to model the turbine blades in solidworks but I've been having issues getting the loft to work without weird twists happening. I have tried guide curves, and everything I can think of, but nothing is working. I don't understand why the loft doesn't work, the shape slowly changes along the root of the blade, and I've introduced as gradual changes as I can to try to minimize stress concentrations. I'm trying to get an accurate model of my design so I can do FEA on the finished shape with loads determined by BEMT analysis, and if the testing is successful, 3-D print the blade design.

 

I have defined airfoil curves at 19 sections of the blade, with it morphing from a circle to an ellipse, then the three different airfoils with varying twist and chord length. I have not been able to get the loft to work without it applying additional twist to the shape which would hurt the performance.

 

Solidworks screenshot.jpg

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