00000cab a22000003a 4500 UP-99796217611368176 Buklod 20231008001416.0 m |o d | ta 140813s xx d | ||r ||||| || DENGII eng Danao, Louis Angelo M. A numerical investigation into the performance and aerodynamics of a vertical axis wind turbine Louis Angelo Danao. pp. 1-22 Numerical simulations were carried out to investigate the performance of a wind tunnel scale vertical axis wind turbine (VAWT). Steady wind simulations at U=7 m/s have shown that at the low range, there is a distinct negative through in the power coefficient (CP) that is drag dominated and consistent to experimental results. Minimum CP is -0.04 at x=2 while maximum CP is 0.33 at x = 4.5. A closer inspection of two x's reveals that at x = 2 while maximum CP is 0.33 at x = 4.5. A closer inspection of two x's reveals that at x=2, the blades experience stalled flow initially from a separation bubble forming at 0 = 60 degrees with subsequent shedding of vortices. Reattachment occurs very much delayed beyond halfway of the rotation. The same delayed reattachment is observed in the downwind with partial stall still visible at 0 = 330 degrees. At x = 4, blade stall is only observed in the second quadrant of rotation with the deepest stall seen at 0 = 130 degrees. High values of positive blade torque Tb reaching 1N m are predicted in the upwind while most of the downwind region from 0 = 190 degrees to 0 = 340 degrees also produce positive performance that contribute to the overall positive CP of just below 0.3. Computational fluid dynamics. Vertical axis wind turbine. Aerodynamics. Philippine Engineering Journal 34, 2 (2 copies) (2013(D)). Also available online for University of the Philippines Diliman. Click here https://journals.upd.edu.ph/index.php/pej/article/view/7895 (viewed 12 January 2021) FI Article