Wind tunnel evaluation of a truncated NACA 64-621 airfoil for wind turbine applications
An experimental program to measure the aerodynamic performance of a NACA 64-621 airfoil with a truncated trailing edge for wind turbine applications has been conducted in the Ohio State University Aeronautical and Astronautical Research Laboratory 6 in. x 22 in. pressurized wind tunnel. The blunted or trailing edge truncated (TET) airfoil has an advantage over similar sharp trailing edge airfoils because it is able to streamline a larger spar structure, while also providing aerodynamic properties that are quite good. Surface pressures were measured and integrated to determine the lift, pressure drag, and moment coefficients over angles of attack ranging from -14 to +90 at Mach 0.2 and Reynolds numbers of 1,000,000 and 600,000. Results are compared to the NACA 0025, 0030, and 0035 thick airfoils with sharp trailing edges. Comparison shows that the 30% thick NACA 64-621-TET airfoil has higher maximum lift, higher lift curve slope, lower drag at higher lift coefficients, and higher chordwise force coefficient than similar thick airfoils with sharp trailing edges.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
- DOE Contract Number:
- AI01-76ET20320
- OSTI ID:
- 6443460
- Report Number(s):
- DOE/NASA-0330-2; NASA-CR-180803; ON: DE87013124
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
170602* -- Wind Energy Engineering-- Turbine Design & Operation
AERODYNAMICS
AIRFOILS
ENERGY SOURCES
FLUID MECHANICS
MACHINERY
MECHANICS
PERFORMANCE TESTING
POWER
RENEWABLE ENERGY SOURCES
TESTING
TUNNELS
TURBINES
TURBOMACHINERY
UNDERGROUND FACILITIES
WIND POWER
WIND TUNNELS
WIND TURBINES