An experimental investigation of the effect of vortex generators on the aerodynamic characteristics of a NACA 0021 airfoil undergoing large amplitude pitch oscillations
- Ohio State Univ., Columbus, OH (USA). Dept. of Aeronautical and Astronautical Engineering
A NACA 0021 14-chord airfoil was subjected to large amplitude pitch oscillations in The Ohio State University Low Speed Wind Tunnel at a Reynolds number of 1.2 {times} 10{sup 6}. Surface pressures were measured with an electronically scanned pressure measurement system at sampling rates up to 50 Hz. Data were acquired for the clean airfoil and for the airfoil with vortex generators located at 0.1 and 0.3 chord distances aft of the leading edge. The vortex generators increase the maximum lift coefficient and the lift curve slope for both the static and dynamic tests. The magnitude and detail of the vortex generator effects were found to depend on the amplitude and frequency of the pitch oscillations. 18 refs., 76 figs., 21 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA); Ohio State Univ., Columbus, OH (USA). Dept. of Aeronautical and Astronautical Engineering
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5850424
- Report Number(s):
- SAND-90-7111; ON: DE91012102
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
170602* -- Wind Energy Engineering-- Turbine Design & Operation
AERODYNAMICS
AIRFOILS
DESIGN
FLUID FLOW
FLUID MECHANICS
INCLINATION
MACHINERY
MECHANICS
OSCILLATIONS
PRESSURE MEASUREMENT
REYNOLDS NUMBER
TESTING
TUNNELS
TURBINE BLADES
TURBINES
TURBOMACHINERY
TURBULENT FLOW
UNDERGROUND FACILITIES
VERTICAL AXIS TURBINES
VORTEX FLOW
WIND TUNNELS
WIND TURBINES