Vertical axis wind turbines (VAWT) are an alternative to horizontal axis wind turbines (HAWT) for wind and tidal energy harvesting applications. Studies of vertical axis wind turbines have heavily invested in understanding the behaviour of the complete turbine, but often with only cursory assessment of the contributions of unsteady aerodynamics of individual blades. This paper experimentally ex...

Studying the scale effect of dynamic airfoil is helpful for understanding stall phenomenon and unsteady wall interference. In this paper, characteristics National Advisory Committee Aeronautics 0012 was studied using time-resolved pressure measurements first time, which different from Reynolds number as experimental not varied. The evolution field vortex development on scaled models investigate...

Flexible aerodynamic surfaces have been shown to favorably influence flight characteristics by increasing lift, angle of attack at stall, and resistance to perturbation. The objective of the research presented within this thesis is to investigate the influence of two aspects of flight observed in biological flyers, a suction-surface flap and dynamic stall, when applied to pliant wings. A rigid ...

Dynamic stall is an aerodynamic phenomenon encountered when rotorcraft operate near performance boundaries typical of high-speed or maneuvering flight. The complex, highly non-linear aerodynamics and associated interaction with the structures induce exceptionally high loads, violent vibrations, reduced handling qualities, and a reduction in fatigue life. The prediction of dynamic stall remains ...

Title of Dissertation: A Coupled CFD/CSD Investigation of the Effects of Leading Edge Slat on Rotor Performance Asitav Mishra, Doctor of Philosophy, 2012 Dissertation directed by: Associate Professor James D. Baeder Department of Aerospace Engineering A coupled Computational Fluid Dynamic (CFD) and Computational Structural Dynamics (CSD) methodology is extended to analyze the effectiveness of a...