Aerodynamic characteristics of seven symmetrical airfoil sections through 180-degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines
When work began on the Darrieus vertical axis wind turbine (VAWT) program at Sandia National Laboratories, it was recognized that there was a paucity of symmetrical airfoil data needed to describe the aerodynamics of turbine blades. Curved-bladed Darrieus turbines operate at local Reynolds numbers (Re) and angles of attack (..cap alpha..) seldom encountered in aeronautical applications. This report describes (1) a wind tunnel test series conducted at moderate values of Re in which 0 less than or equal to ..cap alpha.. less than or equal to 180/sup 0/ force and moment data were obtained for four symmetrical blade-candidate airfoil sections (NACA-0009, -0012, -0012H, and -0015), and (2) how an airfoil property synthesizer code can be used to extend the measured properties to arbitrary values of Re (10/sup 4/ less than or equal to Re less than or equal to 10/sup 7/) and to certain other section profiles (NACA-0018, -0021, -0025).
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6548367
- Report Number(s):
- SAND-80-2114
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DARRIEUS ROTORS
TURBINE BLADES
AERODYNAMICS
AIRFOILS
COMPARATIVE EVALUATIONS
DATA COMPILATION
PERFORMANCE TESTING
REYNOLDS NUMBER
WIND TUNNELS
DATA
FLUID MECHANICS
INFORMATION
MECHANICS
NUMERICAL DATA
ROTORS
TESTING
TUNNELS
170602* - Wind Energy Engineering- Turbine Design & Operation