Turbulence grids are employed in an investigation to study the effects of freestream turbulence levels on aerodynamic loads for several low-aspect-ratio flat-plate wings. The objective of this research was to investigate how large levels of freestream turbulence affect a fixed wing in a low-speed turbulent flow. This paper specifically focuses on time-averaged mean load measurements of wings with three aspect ratios in highly turbulent and low-turbulence baseline flows. Relevant findings are that the presence of turbulence decreases the mean lift for an aspect ratio of 1 wing while increasing the mean lift for an aspect ratio of 2 and 4 wings. The stall angle of attack was increased for all aspect ratios investigated. Turbulence also modifies pitching moments to behave more smoothly than baseline cases. The standard deviations of the loads were found to be constant across the angle of attack, but the rolling moment was significantly increased with increasing aspect ratios.
Mean Loads from Wind-Tunnel Turbulence on Low-Aspect-Ratio Flat Plates
Journal of Aircraft ; 50 , 3 ; 863-870
2013-03-04
8 pages
Article (Journal)
Electronic Resource
English
Mean Loads from Wind-Tunnel Turbulence on Low-Aspect-Ratio Flat Plates
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