21st Congress of International Council of the Aeronautical Sciences, Melbourne, Australia, 13-18 September, 1998
Paper ICAS-98-2.8.2

PREDICTION OF THE VORTICITY FIELD PRODUCED BY AIR-JET VORTEX GENERATORS

Bray T. P., Garry K. P.
Cranfield University, United Kingdom

Keywords: vorticity field, air-jet vortex generators

A parametric study of the vorticity profiles of air-Jet vortex generators has been carried out, and an empirical model which allows the prediction of the vorticity field downstream of the air-jet vortex generators has been derived. Measurements were carried out in two studies: a low speed and a high speed test. The low speed test was at a free-stream velocity of 20 m/s (M = 0.588), while the high speed test was at Mach numbers of 0.5, 0.6, 0.75. Both tests used a miniature 5 hole pressure probe traversed in a plane normal to the free-stream, downstream of the vortex generators. The experimental data has been used to produce a series of relationships which allow the prediction of vorticity from vortex generators with the aim of simplifying numerical simulations of a flow field incorporating such devices.

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