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Graham, H.Z., Hubbell, M., Panther, C., Wilhelm, J.P., Angle, G.M. and Smith, J.E. (2009) Circulation Controlled Airfoil Analysis through 360 Degrees Angle of Attack. ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences, San Francisco, 19-23 July 2009, 571-577.

has been cited by the following article:

• TITLE: Dynamic Circulation Control for a Vertical Axis Wind Turbine using Virtual Solidity Matching

  AUTHORS: Jay P. Wilhelm, Andrew C. Nix, Chad C. Panther, Wade W. Huebsch, James E. Smith

  KEYWORDS: Circulation Control, Vertical Axis Wind Turbine, VAWT, Flow Control, Solidity Matching

  JOURNAL NAME: Smart Grid and Renewable Energy, Vol.8 No.4, April 28, 2017

  ABSTRACT: Vertical Axis Wind Turbines (VAWTs) with fixed pitch blades have a limited power capture performance envelope as the Tip Speed Ratio (TSR) changes. Circulation Control (CC) has been proposed and simulated to possibly increase power capture of a VAWT using constant CC jet momentum, but a practical method of minimizing CC usage has yet to be explored. In addition, VAWTs are typically limited in power capture performance either by a maximum peak at a small set of TSR or wide operating TSR at fractions of the peak performance based on the design solidity. Both the reduced jet usage and solidity limitation were addressed by developing a method of dynamically using CC to perform a virtual solidity change. The developed method described within this work used CC to change blade aerodynamics to specifically match a maximum performing static solidity or wake shape at a given TSR. Simulation results using an existing aerodynamics model indicated a significant reduction in the re-quired CC jet momentum compared to a constant CC system along with control over power capture for a CC-VAWT.