23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-7.9.4

ON WAKE VORTEX RESPONSE FOR SEVERAL COMBINATIONSOF LEADING AND FOLLOWING AIRCRAFT

L. M. B. C. Campos, J. M. G. Marques
IST, Portugal

Keywords: wake vortex, wake -airplane interaction

The response of a following airplane to a pair of wing tip vortices left by a leading aircraft, represented by the Hallock-Burnham model, with added vorticity decay between the two aircraft. The effect of vorticity is evaluated as concerns the induced rolling moment and also the lift loss; these specify respectively the roll acceleration and the downward acceleration. The corresponding two response equations can be put into de same dimensionless form, and integrated using exponential integrals. In the present paper we study the three ICAO weight categories of light, medium and heavy, plus two other cases, viz. the special case of Boeing 757, which requires larger separations distances, and the case of very large aircraft, like the VLTA.

view full paper