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December 11, 2018, 11:49 |
Negative Cp for three straight blades VAWT
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#1 |
New Member
João de Sousa Bomfim Neto
Join Date: Oct 2017
Location: Maranguape, Ceará, Brasil
Posts: 25
Rep Power: 8 |
Hi friends,
This is my first post. I am trying to validate an simulation using ansys CFX with FORTRAN routines, but for this case, the routines don't interfere. The simulation is a case transient, of rotor-stator with sliding mesh. In the article, for the TSR = 2.5, cp is approximately 0.14. The mesh in the work don't have many elements (43 524), but have a good quality (the less is 0.67) and is composite by hexaedra structured elements. The cp obtained in the simulation for the same TSR is about -0.016. I tryed increase the number of elements, but I obtained a similar result. The torque in the blades are calculated by CEL, adding for each blade, the torque in extern and intern side. The wind velocity is 8.5 m/s. Anybody have an idea what problem is it? If need an archive, I could provide. Sorry for my bad english. Thank's for the attention! |
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Tags |
cfx, negative cp, tsr, vawt |
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