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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Druckformat: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v1.i1.50
pages 35-41

VISUALIZATION OF TIP VORTEX/AIRFOIL INTERACTION

Farukh A. Khan
Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556
Thomas J. Mueller
Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556

ABSTRAKT

The effects of the vortical wake shed by a finite wing on a two-dimensional airfoil situated downstream were studied. Two forms of flow visualization were employed. First, the downstream airfoil boundary-layer behavior was studied using surface-film visualization. This consisted of smearing a mixture of propylene glycol and fluorescein onto the downstream airfoil, and viewing the resulting flow patterns under ultraviolet light. Second, the trajectory of the tip-vortex shed by the forward surface was examined using a kerosene vapor tracer. The freestream Reynolds number, based on the downstream airfoil chord length, was 150,000 for all tests. The surface-film visualization technique proved to be a very effective method for locating regions of separated flow on the airfoil. The smoke visualization provided good indication of the position of the tip-vortex relative to the two lifting surfaces. Several examples of both techniques are included in the paper.