APPLICATION ANALYSIS OF CO-ROTATING AND COUNTER-ROTATING VORTEX GENERATORS IN WIND TURBINES

We employed the transition model to examine both counter-rotational（Cot）and co-rotational（Co）VGs，initially focusing on a plane before analyzing the NREL Phase Ⅵ wind turbine. The plane-based VG study aimed to understand Cot-and Co-VGs behavior under large inflow angles. Analyzing the flow field across sections and the output torque at varying wind speeds，we explored the VGs installation impacts under TDRE. The simulation findings were juxtaposed with NREL test data，confirming that our calculations align well with experimental values，with a peak torque error of 9.3%. Results from the plane study indicated that Cot-VGs’behavior starts resembling that of Co-VGs，with the former displaying reduced efficiency at extensive inflow angles. Findings from the wind turbine study revealed that VGs enhance blade output power and delay the airfoil surface’s separation point，particularly prominent at the leading edge. With the wind turbine’s TDRE in play，Co-VGs demonstrate superior performance over Cot-VGs. © 2024 Science Press. All rights reserved.