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NREL / SOWFA

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In example.NREL5MW.ALMAdvancedFAST8, the blade effect in flow field is missing when change the bladeForceProjectionDirection. #92

Open bp-liu opened 2 years ago

bp-liu commented 2 years ago

I made some modifications to example.NREL5MW.ALMAdvancedFAST8 and added HydroDyn modules to OpenFAST. It was found that the overall calculation result was small. When the wind speed reached 11.4m/s, the output power was only about 2.6MW. Later, it was found that by modifying the bladeForceProjectionDirection option in turbineArrayProperties and changing "sampledVelocityAligned" to "localVelocityAligned", i can get a more correct power output (reached 4.5MW, the calculation results are similar to those when OpenFAST is run alone). However, when I checked the flow field information, I found that the effect of the blade could not be displayed. Has anyone ever encountered this situation? How to deal with it?

Or does anyone use SOWFA and OpenFAST coupling to solve the floating turbines problems? How do you deal with the power problem?

chatianming commented 1 year ago

hello, I install the SOWFA and OpenFAST2.6, but the test case in the gitHub cann't run, could you share your test case and help me to test the solver of "pisoFoamTurbine.ALMAdvancedOpenFAST".

very very thank you! @bp-liu

bp-liu commented 2 months ago

Recently, I have started researching this issue again, and as I delve deeper into the source code, I have found that in line 2385 of HorizontalAxisWindTurbinesALMOpenFAST.C, the calculation formulas for localityAligned and localityAlignedCorrected have been annotated. Is this the reason why the flow field cannot update the volume force caused by the blades when using localVelocityAligned? When I observe HorizontalAxisWindTurbinesALMAdvanced.C, it was found that this section was not annotated. Does this mean that when using the OpenFAST coupled solver, the option of localVelocityAligned cannot be selected? What kind of modifications should I make to the source code if I want to use the localVelocityAligned option? Thank you very much for your reply. @ewquon @mchurchf @gantech

bp-liu commented 2 months ago

hello, I install the SOWFA and OpenFAST2.6, but the test case in the gitHub cann't run, could you share your test case and help me to test the solver of "pisoFoamTurbine.ALMAdvancedOpenFAST".

very very thank you! @bp-liu

In my previous post, there was a calculation example I uploaded, you can refer to it.