Effectiveness Analysis of Three-dimensional Effect Correction Formulas Based on the CFD and Wind Tunnel Experiment of the Scaled Wind Turbines

Based on the NREL Phase VI and its scaled wind turbines, and combined with 3D CFD numerical simulations and 2D airfoil wind tunnel experiments, the correction effects of four three-dimensional effect correction formulas including Snel, Lindenburg, Du & Selig, Chaviaropoulos & Hansen in low Reynolds number are compared and analyzed. The results show that their effectiveness differs from each other while the correction value is generally larger than the real value. Specifically from the comprehensive comparison, Du & Selig formula demonstrates the best effect, and the performance can be ranked in descending order as Lindenburg, Snel and Chaviaropoulos & Hansen. Regarding the correlation between the correction effect and the blade scale from small to large when λ=5.39 in the whole blade area, it can be ordered as Snel, Chaviaropoulos & Hansen, Lindenburg, Du & Selig; when λ=8.00 in the whole blade area and λ=10.00 in the middle or outboard blade area, the order is Du & Selig, Lindenburg, Snel, Chaviaropoulos & Hansen; while when λ=10.00 in the root blade area, it goes like Lindenburg, Snel, Chaviaropoulos & Hansen, Du & Selig.