Evaluation of Fast-Time Wake Vortex Models using Wake Encounter Flight Test Data

Abstract

This paper describes a methodology for the integration and evaluation of fast-time wake models with flight data. The National Aeronautics and Space Administration conducted detailed flight tests in 1995 and 1997 under the Aircraft Vortex Spacing System Program to characterize wake vortex decay and wake encounter dynamics. In this study, data collected during Flight 705 were used to evaluate NASA's fast-time wake transport and decay models. Deterministic and Monte-Carlo simulations were conducted to define wake hazard bounds behind the wake generator. The methodology described in this paper can be used for further validation of fast-time wake models using en-route flight data, and for determining wake turbulence constraints in the design of air traffic management concepts.

Authors

• Ahmad, Nashat N. NASA Langley Research Center
• VanValkenburg, Randal L. NASA Langley Research Center
• Bowles, Roland L. NASA Langley Research Center
• Limon Duparcmeur, Fanny M. Craig Technologies, Inc.
• Gloudesman, Thijs Delft Univ. of Technology
• van Lochem, Sander Delft Univ. of Technology
• Ras, Eelco Delft Univ. of Technology