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Research Papers

Effect of Blade Torsion on Modeling Results for the Small Wind Research Turbine (SWRT)

[+] Author and Article Information
Dave Corbus

National Wind Technology Center, National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, CO 80401-3393

A. Craig Hansen, Jeff Minnema

 Windward Engineering LLC, 2225 East Murray Holladay Road No. 201A, Salt Lake City, UT 84117

J. Sol. Energy Eng 128(4), 481-486 (Jun 13, 2006) (6 pages) doi:10.1115/1.2349551 History: Received February 15, 2006; Revised June 13, 2006

The small wind research turbine (SWRT) testing project was initiated with the goal of better characterizing both small wind turbine loads and dynamic behavior. 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, including furling. Previous papers have discussed modeling results for the SWRT using the FAST aeroelastic simulator. This paper summarizes modeling results from both the FAST and ADAMS aeroelastic simulators. The ADAMS model allows for blade torsional stiffness to be modeled, which is shown to significantly improve the agreement between model and test results for rotor speed and explain variances in previous comparisons between the SWRT FAST modeling results and the SWRT test data. The ADAMS model results also show that the aerodynamic pitching moment impacts the blade torsion more than the inertial forces.

Copyright © 2006 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

IEC category A and test turbine turbulence intensities

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Figure 2

Ten minute mean and maximum values of rotor RPM

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Figure 3

Ten minute mean and maximum values of tail furl

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Figure 4

Ten minute mean, minimum, and maximum values of thrust

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Figure 5

Ten minute mean, maximum, and minimum values of electric power

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Figure 6

Ten minute mean values of yaw error

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Figure 7

Ten minute mean, maximum, and minimum values of blade 1 flap bending

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Figure 8

Elastic twist versus rotor RPM for one 10-min test with average wind speed of 16.2m∕s

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Figure 9

Elastic twist of blade tip and rotor RPM versus time for same 10-min test (negative twist is toward feather)

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Figure 10

Rotor RPM versus time for same 10-min test

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Figure 11

Rotor furl versus time for same 10-min test

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Figure 12

Rotor thrust versus time for same 10-min test

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Figure 13

Yaw error versus time for same 10-min test

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Figure 14

Ten minute mean and maximum values of rotor RPM

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Figure 15

Ten minute mean and maximum electric power

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Figure 16

Rotor RPM versus wind speed for ADAMS with two different wake models and SWRT data

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