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A platform for research: civil engineering, architecture and urbanism
A three-dimensional analysis of stall-delay on a horizontal-axis wind turbine
AbstractThis paper describes a three-dimensional aerodynamic analysis of a horizontal-axis wind turbine. The main aim was to investigate the widely-observed phenomenon of stall-delay, whereby the stall angle for a blade element can be significantly higher than for a two-dimensional aerofoil of the same section. Stall-delay appears to depend mainly on the local solidity of the blades. It results from a reduction in the adverse pressure gradient on the upper surface of a blade and the consequent delay in boundary layer separation. When operating in the region of stall-delay, blade elements produce more power than is predicted by conventional analyses which rely on two-dimensional aerofoil characteristics. It is suggested that the improved performance has important implications for the design of wind turbines.
A three-dimensional analysis of stall-delay on a horizontal-axis wind turbine
AbstractThis paper describes a three-dimensional aerodynamic analysis of a horizontal-axis wind turbine. The main aim was to investigate the widely-observed phenomenon of stall-delay, whereby the stall angle for a blade element can be significantly higher than for a two-dimensional aerofoil of the same section. Stall-delay appears to depend mainly on the local solidity of the blades. It results from a reduction in the adverse pressure gradient on the upper surface of a blade and the consequent delay in boundary layer separation. When operating in the region of stall-delay, blade elements produce more power than is predicted by conventional analyses which rely on two-dimensional aerofoil characteristics. It is suggested that the improved performance has important implications for the design of wind turbines.
A three-dimensional analysis of stall-delay on a horizontal-axis wind turbine
Wood, D.H. (author)
1990-05-23
14 pages
Article (Journal)
Electronic Resource
English