JOHN J. HARPER LOW SPEED WIND TUNNEL


Daniel Guggenheim Building
School of Aerospace Engineering






Active since 1930, this closed-circuit tunnel is driven by a 600HP DC motor. Its present 7 feet x 9 feet test section was created in 1983 by installing a flat floor and ceiling in a 9-foot circular duct. A breather at the downstream end of the test section keeps the test section pressure atmospheric. The speed range is from 10 to 220 fps. Recent measurements show test section turbulence levels below 0.3%.

Sponsored research at the doctoral level, and testing for industry are the primary activites at the tunnel. This is the Forward Flight facility of the Georgia Tech Center of Excellence in Rotorcraft Technology. A growing array of diagnostic techniques has enabled significant progress in the field of rotorcraft aerodynamic interactions. Since the early 90's, an active program has also developed in other vortex flow problems, notably in twin-tail buffeting, forebody asymmetry control and the development of a multiple-degree-of-freedom Wind Driven Manipulator.

Laser Velocimetry has been used routinely since 1985, and now includes fiber-optic as well as mechano-optical traverses. Present capabilities include automated scanning of static pressure and condenser microphone sensors, dual-channel hot-film anemometry, high-frequency pulsed laser sheet imaging, and digital signal and image processing.
 


|HOME | PEOPLE | FACILITIES | WHAT WE DO | RECENT PROJECTS | PUBLICATIONS | DOING BUSINESS WITH US | JOINING OUR TEAM | ACKNOWLEDGEMENTS