24th Congress of International Council of the Aeronautical Sciences, 29 August-3, September 2004, Yokohama, Japan
Paper ICAS 2004-2.9.R.1

AN UNSTEADY AND TIME-AVERAGED STUDY OF A GROUND VORTEX FLOW

N. J. Lawson, J. M. Eyles*, K. Knowles*
College of Aeronautics, Cranfield University, Cranfield MK43 0AL,UK; *Dept. of Aerospace, Power & Sensors, Cranfield University, Shrivenham SN6 8LA, UK

Keywords: ground vortex, compressible flow, PIV

PIV and LDA results are presented from a scaled compressible ground vortex flow with a moving ground plane. Analysis shows the ground vortex position to fluctuate chaotically by rms distances of up to 4 nozzle diameters. Time averaged data suggested greatest sensitivity to vortex position with cross flow velocity.

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