Abstract
The diffuser total efficiency was formulated and defined based on the generalized actuator disc model for the index of the efficiency of the diffuser-alone of the diffuser-augmented wind turbines. An optimization method to maximize the diffuser total efficiency was developed using a genetic algorithm and axisymmetric computational fluid dynamics. A case study was conducted for a 10% chord-to-diameter ratio, 2% thickness-to-chord plate, and the crest position at 50% chord of the diffuser. The optimal result showed a diffuser total efficiency of 1.087. Furthermore, 1392 (=48 population × 29 generations) simulation cases of the optimization process showed that high diffuser total efficiency appears at a low-drag coefficient, high-lift coefficient, and 15–25% low diffuser height-to-chord ratio.
Original language | English |
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Article number | 813 |
Number of pages | 16 |
Journal | Energies |
Volume | 14 |
Issue number | 4 |
DOIs | |
Publication status | Published - 4 Feb 2021 |
Keywords
- total power coefficient
- total diffuser efficiency
- generalized actuator disc