Visualization and flow surveys of the leading edge vortex structure on delta wing planformsIn the present experimental investigation of thin delta wing vortex breakdown, for the cases of sweep angles of 70, 75, 80, and 85 deg, and smoke flow visualization/laser light sheet technique is used to obtain cross sectional views of the leading edge vortices as they break down. A combination of lateral and longitudinal cross sectional views furnishes data on the three-dimensional character of the vortex before, during, and after breakdown. Velocity measurements conducted with a laser Doppler anemometer on the 70 deg sweep delta, at 30 deg angle-of-attack, indicate that when breakdown occurs the core flow is transformed from a jet-like to a wake-like flow.
Document ID
19860035079
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Payne, F. M. (Notre Dame Univ. IN, United States)
Ng, T. T. (Notre Dame Univ. IN, United States)
Nelson, R. C. (Notre Dame, University IN, United States)
Schiff, L. B. (NASA Ames Research Center Moffett Field, CA, United States)