Research Article
Effect of Rotation Friction Ratio on the Power Extraction Performance of a Passive Rotation VAWT
Table 1
Details of grid numbers and iteration time steps considered in this paper.
| | | grid nodes on the blade | cells in the rotation zone(×3) | the height of the first cell on the blade | total number of cells | iteration time steps |
| | grid1 | 200 | 8.5×103 | 0.005b | 5.3×104 | ∆t=1.00×10−4 | | ∆t=1.25×10−4 |
| | grid2 | 500 | 1.9×104 | 0.001b | 8.6×104 | ∆t=1.00×10−4 | | ∆t=1.25×10−4 |
| | grid3 | 1000 | 3.6×104 | 0.0005b | 1.4×105 | ∆t=1.00×10−4 | | ∆t=1.25×10−4 |
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