Wake characteristics of a tower for the DOE--NASA MOD-1 wind turbine

Technical Report · Sat Apr 01 04:00:00 EST 1978

OSTI ID:6970499

Savino, J M; Wagner, L H; Nash, M

A /sup 1///sub 40/th-scale model of a tower concept designed for the DOE-NASA MOD-1 wind power turbine was tested in a low-speed wind tunnel to determine the flow characteristics in the wake downwind of the tower. The tower model is a four-leg lattice type structure constructed with round members and gusset plates at the intersections of the members. Wind speed profiles were determined in a fixed plane downstream of the tower. Local values of wake minimum velocity ratio, average velocity ratio, and width were determined from these profiles, and these quantities were presented as a function of tower elevation for six wind approach angles form 0/sup 0/ to 45/sup 0/. The results from the MOD-1 tower model were compared to those of a MOD-O tower model (also a four-leg lattice configuration, but without gusset plates) and an eight-leg model previously reported. All three towers were constructed with round members. The comparison was based on single mean values of ratio of average velocity defect to free-stream velocity and ratio of wake thickness to blade radius.

• Research Organization: National Aeronautics and Space Administration, Cleveland, Ohio (USA). Lewis Research Center
• DOE Contract Number: EX-76-A-29-1028
• OSTI ID: 6970499
• Report Number(s): DOE/NASA/1028-78/17; NASA-TM-78853
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
170602* -- Wind Energy Engineering-- Turbine Design & Operation
AERODYNAMICS
CONFIGURATION
FLUID MECHANICS
MECHANICAL STRUCTURES
MECHANICS
MOCKUP
NASA
NATIONAL ORGANIZATIONS
PERFORMANCE TESTING
STRUCTURAL MODELS
TESTING
TUNNELS
US ORGANIZATIONS
WIND TUNNELS
WIND TURBINES