Dynamic stall on wind turbine blades

Conference · Sun Dec 01 00:00:00 EST 1991

OSTI ID:6088450

Butterfield, C P; Simms, D; Scott, G ^[1]; Hansen, A C ^[2]

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1. National Renewable Energy Lab., Golden, CO (United States)
2. Utah Univ., Salt Lake City, UT (United States)

Dynamic loads must be predicted accurately in order to estimate the fatigue life of wind turbines operating in turbulent environments. Dynamic stall contributes to increased dynamic loads during normal operation of all types of horizontal-axis wind turbine (HAWTs). This report illustrates how dynamic stall varies throughout the blade span of a 10 m HAWT during yawed and unyawed operating conditions. Lift, drag, and pitching moment coefficients during dynamics stall are discussed. Resulting dynamic loads are presented, and the effects of dynamic stall on yaw loads are demonstrated using a yaw loads dynamic analysis (YAWDYN). 12 refs., 22 figs., 1 tab.

• Research Organization: National Renewable Energy Lab., Golden, CO (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-83CH10093
• OSTI ID: 6088450
• Report Number(s): NREL/TP-257-4510; CONF-9109112-7; ON: DE92001157
• Resource Relation: Conference: 21. American Wind Energy Association conference: windpower '91, Palm Springs, CA (United States), 24-27 Sep 1991
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
TURBINE BLADES
WIND LOADS
AIRFOILS
HORIZONTAL AXIS TURBINES
MECHANICAL TESTS
STRESSES
VELOCITY
WIND
DYNAMIC LOADS
MACHINERY
MATERIALS TESTING
TESTING
TURBINES
TURBOMACHINERY
WIND TURBINES
170602* - Wind Energy Engineering- Turbine Design & Operation