Abstract
NREL has completed the initial twisted blade field tests of the 'Unsteady Aerodynamics Experiment.' This test series continues systematic measurements of unsteady aerodynamic phenomena prevalent in stall-controlled horizontal axis wind turbines (HAWTs). The blade twist distribution optimizes power production at a single angle of attack along the span. Abrupt transitions into and out of stall arecreated due to rapid changes in inflow. Data from earlier experiments have been analyzed extensively to characterize the steady and unsteady response of untwisted blades. In this report, a characterization and comparison of the baseline aerodynamic performance of the twisted versus non-twisted blade sets will be presented for steady flow conditions.
| Original language | American English |
|---|---|
| Number of pages | 11 |
| State | Published - 1995 |
NREL Publication Number
- NREL/TP-442-20281
Keywords
- aerodynamic performance
- blade field testing
- blade twist
- HAWT
- horizontal-axis wind turbines (HAWT)