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Title: Analysis and Comparison of Test Results from the Small Wind Research Turbine Test Project: Preprint

Analysis and Comparison of Test Results from the Small Wind Research Turbine Test Project: Preprint Most small wind turbines furl (yaw or tilt out of the wind) as a means of limiting power and rotor speeds in high winds. The Small Wind Research Turbine (SWRT) testing project was initiated in 2003 with the goal of better characterizing both small wind turbine loads (including thrust) and dynamic behavior, specifically as they relate to furling. The main purpose of the testing was to produce high-quality data sets for model development and validation and to help the wind industry further their understanding of small wind turbine behavior. Testing was conducted on a modified Bergey Excel 10-kW wind turbine. A special shaft sensor was designed to measure shaft loads including thrust, torque, and shaft bending. Analysis of 10-minute mean data showed a strong correlation between furling and center of thrust location, as calculated from the shaft-bending and thrust measurements. Data were collected for three different turbine configurations that included a change in the lateral furling offset and the blades. An analysis of inflow conditions indicated that organized atmospheric turbulence had some impact on furling.
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Publication Date:
OSTI Identifier:15011679
Report Number(s):NREL/CP-500-36891
TRN: US200507%%673
DOE Contract Number:AC36-99-GO10337
Resource Type:Conference
Resource Relation:Conference: Prepared for the 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, NV (US), 01/10/2005--01/13/2005; Other Information: PBD: 1 Nov 2004
Research Org:National Renewable Energy Lab., Golden, CO (US)
Sponsoring Org:US Department of Energy (US)
Country of Publication:United States
Language:English
Subject: 17 WIND ENERGY; BENDING; ROTORS; TESTING; TORQUE; TURBINES; TURBULENCE; VALIDATION; WIND TURBINES; WIND POWER WIND ENERGY; WIND TURBINE; SMALL WIND RESEARCH TURBINE PROJECT; SWRT; BERGEY EXCEL