January 24, 2022 at 4:35 amJansysSubscriber
I'm trying to validate an experimental study by trying to obtain the same torque.
the dimensions of the blades were given, so I modeled and ran simulations on CFD fluent
wind speed: 7 m/s
Used this formula to calculate rpm : rpm = 60 * V * TSR / ( Pi * D )January 24, 2022 at 11:29 amRobAnsys EmployeeAssuming the blade shape is also defined I'd expect to get a similar result with a good mesh. With a poor mesh I'd expect to be closer than you're seeing above.
January 24, 2022 at 2:45 pmJansysSubscriberThe blade shapes are halve cylinders, here are my mesh settings as well. I'm not sure what would be considered as good mesh?
Here is a link to the study I am trying to validate for as required by our thesis defense panel:
Results after increasing domain size at 5 m/s: I was able to reach torque of around .06 still far from .03 as per graph above
January 24, 2022 at 2:46 pmJanuary 24, 2022 at 3:44 pmRobAnsys EmployeePlease show a slice through the mesh on a z-plane and zoom in on the rotor. How many cell zones have you got?
January 24, 2022 at 7:11 pmJanuary 25, 2022 at 9:38 amRobAnsys Employeez-plane please - ie across the turbine unit. Contours of velocity will be useful too.
January 26, 2022 at 4:28 amJanuary 26, 2022 at 5:32 amJanuary 26, 2022 at 7:20 amDrAmineAnsys EmployeeHow are you calculating the torque in Fluent?
January 26, 2022 at 11:34 amJansysSubscriberBy using the report definitions for moment at the blades, is that correct?
January 26, 2022 at 12:04 pmRobAnsys EmployeeYes, what did you define as the axis?
January 26, 2022 at 12:10 pmJansysSubscriberI used the z axis
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