Measurements of the unsteady vortex flow over a wing-body at angle of attackMeasurements of the unsteady vortex flow over a wing-body at high angles of attack were carried out on a generic test model of a pointed body of revolution with double-delta wings. Vortex patterns and trajectories were quantified from digitized laser sheet video images. The velocity-field measurements showed the jetlike flow in the unburst vortex, unsteady secondary structures below the primary core, and then the reversed flow in the burst vortex. Results of hot-film anemometry revealed the presence of peak frequencies in the velocity spectra over the wing and near the trailing edge, which varied linearly with freestream speed and increased as the measurement point moved upstream. Good Strouhal correlation was found with previous results obtained for a smaller generic wing-body model.
Document ID
19920062974
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Debry, Benoit (NASA Langley Research Center Hampton, VA, United States)
Komerath, Narayanan M. (NASA Langley Research Center Hampton, VA, United States)
Liou, Shiuh-Guang (NASA Langley Research Center Hampton, VA, United States)
Caplin, J. (NASA Langley Research Center Hampton, VA, United States)
Lenakos, Jason (Georgia Institute of Technology Atlanta, United States)