Three-dimensional airfoil performance measurements on a rotating wing

Conference · Thu Jun 01 00:00:00 EDT 1989

OSTI ID:5943838

Butterfield, C P

The objective of this comprehensive research program was to study the effects of horizontal-axis wind turbine (HAWT) blade rotation on aerodynamic behavior below, near, and beyond stall. This paper describes the flow angle sensor used to measure angle of attack (AOA) and how the sensor was calibrated, and it gives results of pressure integrations on the blade. Aerodynamic, load, flow-visualization, and inflow measurements were made on a 10-m, three-bladed, downwind HAWT. A video camera was mounted on the rotor to record video images of tufts attached to the low-pressure side of a constant-chord, zero-twist blade. Load measurements were made using strain gages mounted every 10% of the blade's span. Pressure taps were located at 32 chordwise positions and revealed pressure distributions comparable with wind tunnel data. Inflow was measured using a vertical-plane array of eight propvane and five triaxial (U-V-W) prop-type anemometers located 10 m upwind in the predominant wind direction. Results show evidence of stall hysteresis and unsteadiness at high AOA. Correlations with analytical predictions and wind tunnel tests show good agreement at low AOA and poor agreement at high AOA. 7 refs., 12 figs.

• Research Organization: Solar Energy Research Inst., Golden, CO (USA)
• DOE Contract Number: AC02-83CH10093
• OSTI ID: 5943838
• Report Number(s): SERI/TP-217-3505; CONF-890717-2; ON: DE89009443
• Resource Relation: Conference: European wind energy conference and exhibition, Glasgow, UK, 10 Jul 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
HORIZONTAL AXIS TURBINES
AERODYNAMICS
FLOW VISUALIZATION
PRESSURE MEASUREMENT
STRAINS
WIND LOADS
WIND POWER
DYNAMIC LOADS
ENERGY SOURCES
FLUID MECHANICS
MACHINERY
MECHANICS
POWER
RENEWABLE ENERGY SOURCES
TURBINES
TURBOMACHINERY
WIND TURBINES
WIND ENERGY
HORIZONTAL AXIS WIND TURBINE
FLOW ANGLE SENSOR
PRESSURE
170602* - Wind Energy Engineering- Turbine Design & Operation