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hcOnel / NREL5MW-turbinesFoam

Simulation of NREL 5MW reference turbine using turbinesFoam.
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isolated_case: A SOWFA-identical case with isolated turbine. #2

Open hcOnel opened 6 years ago

hcOnel commented 6 years ago

This case is created upon request to verify turbinesFoam results. Please read the main README file for details.

hcOnel commented 6 years ago

Is it reasonable to copy-paste SOWFA's BladeData directly info fvOptions? Or should it be rearranged because turbinesFoam expects start/end coordinates of elements and airfoils at the center of elements? Does SOWFA and turbinesFoam use the same approach here or not? @petebachant any suggestion on this?

petebachant commented 6 years ago

You should be fine using the geometric values, but turbinesFoam requires some additional information, like chord mounting location.

hcOnel commented 6 years ago

I have rearranged the blade geometry according to an image you have posted before (which I could not find now) which shows how the airfoils are considered to be at the center of elements in turbinesFoam. I solved the case as it is and the Cp convergence graph is as follows: https://github.com/hcOnel/NREL5MW-turbinesFoam/blob/master/case_isolated/cpGraph.png where the converged Cp is around 0.54. Looking for any SOWFA solutions. Also I could not find a blade force distribution of NREL in any article/paper, it would be good to compare.

hcOnel commented 6 years ago

Update: Edited the previous comment since Cp = 0.478 is for V_inf = 8m/s and TSR = 7. Today I've solved the case for these values, I was expecting a lower Cp, solution is currently at around t=70s and I'm getting almost the same graph I did for 11.4 m/s. https://github.com/hcOnel/NREL5MW-turbinesFoam/blob/master/case_isolated/Cp%20for%20V_inf8%20TSR7.png I've changed the freestream velocity values in system/fvOptions and 0.org/include/initialConditions files accordingly. I feel like I did everything right but it looks like something is wrong.