Turbulent wind at the equatorial segment of an operating Darrieus wind turbine blade

Conference · Fri Sep 01 00:00:00 EDT 1989

OSTI ID:5448037

Connell, J. R.; Morris, V. R. ^[1]

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1. Colorado State Univ., Fort Collins, CO (USA). Dept. of Civil Engineering

Six turbulent wind time series, measured at equally spaced equator-height locations on a circle 3 m outside a 34-m Darrieus rotor, are analyzed to approximate the wind fluctuations experienced by the rotor. The flatwise lower root-bending stress of one blade was concurrently recorded. The wind data are analyzed in three ways: wind components that are radial and tangential to the rotation of a blade were rotationally sampled; induction and wake effects of the rotor were estimated from the six Eulerian time series; and turbulence spectra of both the measured wind and the modeled wind from the PNL theory of rotationally sampled turbulence. The wind and the rotor response are related by computing the spectral response function of the flatwise lower root-bending stress. Two bands of resonant response that surround the first and second flatwise modal frequencies shift with the rotor rotation rate. 5 refs., 9 figs.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5448037
• Report Number(s): PNL-SA-17459; CONF-8901170-1; ON: DE90002672
• Resource Relation: Conference: 9. wind energy symposium, New Orleans, LA (USA), 14-18 Jan 1989
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
DARRIEUS ROTORS
TURBULENCE
WIND TURBINES
PERFORMANCE TESTING
DATA ACQUISITION
FORECASTING
FREQUENCY MEASUREMENT
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
RESEARCH PROGRAMS
TRANSIENTS
TURBINE BLADES
WIND POWER
ENERGY SOURCES
MACHINERY
POWER
RENEWABLE ENERGY SOURCES
ROTORS
TESTING
TURBINES
TURBOMACHINERY
170602* - Wind Energy Engineering- Turbine Design & Operation
990200 - Mathematics & Computers