August 25, 2025FluidsOpen Access

Numerical Investigation of Concave-to-Convex Blade Profile Transformation in Vertical Axis Wind Turbines for Enhanced Performance Under Low Reynolds Number Conditions

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Deeply convex blades achieve a peak lift-to-drag ratio of 1.65 at a Reynolds number of 25, outperforming concave blades significantly.
The convex blade shape maintains a power coefficient above 0.030 across low Reynolds number conditions, indicating superior performance.
Steady-state computational fluid dynamics (CFD) simulations across various curvatures demonstrate how convex profiles promote stable laminar flows.
Results highlight the importance of optimizing blade curvature for improved performance in urban wind turbine applications.

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Numerical analysis reveals that convex blade profiles outperform concave ones in aerodynamic performance, suggesting design optimization for VAWTs.

Venkatesh et al. (2025) studied this question.

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Numerical analysis reveals that convex blade profiles outperform concave ones in aerodynamic performance, suggesting design optimization for VAWTs.