Impact of Ground Effect on Airplane Lateral Directional Stability during Take-Off and Landing

Mohamed Sereez, Mikhail Goman, Nikolay Abramov

Research output: Contribution to journalArticlepeer-review


Computational simulations of aerodynamic characteristics of the Common
Research Model (CRM), representing a typical transport airliner are conducted using CFD methods in close proximity to the ground. The obtained
dependencies on bank angle for aerodynamic forces and moments are further
used in stability and controllability analysis of the lateral-directional aircraft
motion. Essential changes in the lateral-directional modes in close proximity
to the ground have been identified. For example, with approach to the
ground, the roll subsidence and spiral eigenvalues are merging creating the
oscillatory Roll-Spiral mode with quite significant frequency. This transformation of the lateral-directional dynamics in piloted simulation may affect the
aircraft responses to external crosswind, modify handling quality characteristics and improve realism of crosswind landing. The material of this paper was
presented at the Seventh European Conference for Aeronautics and Space
Sciences EUCASS-2017. Further work is carried out for evaluation of the
ground effect aerodynamics for a high-lift configuration based on a hybrid
geometry of DLR F11 and NASA GTM models with fully deployed flaps and
slats. Some aspects of grid generation for a high lift configuration using
structured blocking approach are discussed.
Original languageEnglish
Number of pages14
JournalOpen Journal of Fluid Dynamics
Issue number1
Publication statusPublished - 9 Mar 2018
Externally publishedYes

Bibliographical note

Copyright © 2018 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0)


  • CFD
  • High-Lift Configuration
  • Ground Effect
  • Airplane Stability
  • Lateral-Directional Modes


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