This paper presents an overview of experimental investigations on a 65 deg swept delta wing as part of the International Vortex Flow Experiment 2 (VFE-2). Results obtained in low-speed wind tunnel facilities include oil flow and laser light sheet flow visualization, mean and unsteady surface pressure distributions as well as mean and turbulent velocity components of the flow field and close to the wing surface. Details of the delta wing vortex structure and breakdown phenomenon are discussed and analyzed. Special emphasis is on the occurrence of an inner vortex detected for the low Reynolds number and Mach number regime.
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