Wind flow through shrouded wind turbines
Scheuermann, Jonathan P.
MetadataShow full item record
Wall pressure distributions and cross section flow distribution on wind turbine shroud designs, determined through static pressure measurements, were quantified in order to determine the most ideal design that could increase power output and reduce the radar cross section. Engineering and Expeditionary Warfare Center (EXWC) Port Hueneme provided four shroud designs in a 1:160 scale for analysis, including a model with a free-spinning wind turbine incorporated. These models were studied in the Naval Postgraduate School MAE wind tunnel. Tunnel velocity and model angle were varied. Additionally, static wall pressures and cross section flow were studied with the addition of a screen. The pressure measurements were collected by a Scanivalve pressure scanner from up to 90 taps drilled into the models at various locations as well as through an Aeroflow 5-hole probe, which took various measurements at multiple planes of each model. Flow visualization tests, including oil and tufts, were also conducted to help determine the aerodynamic efficiency of each model and identify any sign of flow separation. These studies provided a good evaluation of the efficiency of these models from a fluid flow perspective. While none of the models proved ideal, certain attributes, most importantly the geometry of a wind lens or flange on the shroud and a gradually diverging shape, proved to accelerate the flow through the duct.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Thoma, Johann. (Monterey, California. Naval Postgraduate School, 1993-09);This thesis describes two integer programming models that are developed to support movement planners in optimally routing military units through a road network with minimal delays. The formulations are based on a multicommodity ...
Goerger, Simon R.; McGinnis, Michael L.; Darken, Rudolph P. (West Point, New York, United States Military Academy,, 2005-05);The Department of Defense relies heavily on mathematical models and computer simulations to analyze and acquire new weapon systems. Models and simulations help decision-makers understand the differences between systems ...
Goerger, Simon R.; McGinnis, Michael L.; Darken, Rudolph P. (Monterey, California: Naval Postgraduate School., 2005-01);The Department of Defense (DoD) relies heavily on mathematical models and computer simulations to analyze and acquire new weapon systems. Models and simulations help decision makers understand the differences between systems ...