Analysis and Design of a Wind Turbine with a Wind Accelerator

Bohl, Douglas; Helenbrook, Brian T.; Kanya, Benjamin; Visser, Kenneth D.; Marvin, Russell; Mascarenhas, Brendan S.; Parker, Michael; Rocky, Drew

doi:10.2514/6.2011-3814

Cited by 1 publication

(1 citation statement)

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“…Both models were intended to accelerate the wind prior to entering rotors; however, the smooth cylinder lacked the "flow directing" channels as shown. The high level goal of the project was to design a mid-range, scalable wind turbine for the renewable energy market [15]. In both cases the number of stack turbines, three shown in Figure 1 and used for testing, could be chosen arbitrarily depending on the power requirements.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Finite Aspect Ratio Cylindrical Bodies for Accelerated Wind Applications

Parker¹,

Bohl

2020

Fluids

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The placement of a cylindrical body in a flow alters the velocity and pressure fields resulting in a local increase in the flow speed near the body. This interaction is of interest as wind turbine rotor blades could be placed in the area of increased wind speed to enhance energy harvesting. In this work the aerodynamic performance of two short aspect ratio (AR = 0.93) cylindrical bodies was evaluated for potential use in “accelerated wind” applications. The first cylinder was smooth with a constant diameter. The diameter of the second cylinder varied periodically along the span forming channels, or corrugations, where wind turbine blades could be placed. Experiments were performed for Reynolds numbers ranging from 1 × 105 to 9 × 105. Pressure distributions showed that the smooth cylinder had lower minimum pressure coefficients and delayed separation compared to the corrugated cylinder. Velocity profiles showed that the corrugated cylinder had lower peak speeds, a less uniform profile, and lower kinetic energy flux when compared to the smooth cylinder. It was concluded that the smooth cylinder had significantly better potential performance in accelerated wind applications than the corrugated cylinder.

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Section: Introductionmentioning

confidence: 99%