Development and validation of a wake vortex predictor algorithm (original) (raw)

36th AIAA Aerospace Sciences Meeting and Exhibit, 1998

Abstract

The algorithm described herein predicts the trajectories and circulation decay of aircraft trailing vortices. We first present the methodology used by the algorithm to simulate trailing vortex behavior, including (i) the descent of the vortices through a realistic atmosphere defined by stratification, turbulence and cross wind profiles, and (ii) the interaction of the vortices with the ground. Both the increase in separation between the vortices caused by their approaching the ground and the generation of secondary vorticity due to their interaction with the ground are modeled by the algorithm. We then compare algorithm results with field data and discuss the algorithm's validity and sensitivity. We show that the algorithm performs reasonably well for vortices out of ground effect, and produces promising results for vortices in ground effect. Since it runs in less than one-tenth of a second on a state-of-theart workstation, the algorithm is suitable for use in a real-time aircraft vortex separation system.

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