Aircraft wake vortex decay in ground proximity - Physical mechanisms and Artificial Enhancement

Anton Stephan, Frank Holzäpfel, Takashi Misaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Aircraft wake vortex evolution in ground proximity is investigated numerically with large eddy simulations (LES). The simulations are performed with different modifications of the ground surface in order to trigger rapid vortex decay or to simulate the landing of an aircraft. The impact of environmental turbulence in terms of turbulent winds is taken into account, where wall-resolved and wall-modeled LES are performed for low and high Reynolds number cases, respectively. In order to understand wake vortex decay mechanisms in ground proximity the interaction of primary and secondary vortices is thoroughly investigated. The results show that vortex decay is initiated and accelerated with obstacles at the ground. In order to optimize obstacle shape and size we show that we can achieve a similar effect with relatively small plates as with large block-shaped barriers. Concerning large Reynolds numbers we show that turbulence effects triggered by the ground can not be modeled by a simple wall model. As a first approximation of landing we use a ramp at the ground and show that the flow disturbances are similar to the result of flat ground with obstacles. In particular two kinds of so-called end effects are superposed: pressure waves in the vortex core and the propagation of the secondary vortex structures.

Original languageEnglish
Title of host publication4th AIAA Atmospheric and Space Environments Conference 2012
Publication statusPublished - 2012 Dec 1
Event4th AIAA Atmospheric and Space Environments Conference 2012 - New Orleans, LA, United States
Duration: 2012 Jun 252012 Jun 28

Publication series

Name4th AIAA Atmospheric and Space Environments Conference 2012

Other

Other4th AIAA Atmospheric and Space Environments Conference 2012
CountryUnited States
CityNew Orleans, LA
Period12/6/2512/6/28

ASJC Scopus subject areas

  • Atmospheric Science
  • Space and Planetary Science

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    Stephan, A., Holzäpfel, F., & Misaka, T. (2012). Aircraft wake vortex decay in ground proximity - Physical mechanisms and Artificial Enhancement. In 4th AIAA Atmospheric and Space Environments Conference 2012 (4th AIAA Atmospheric and Space Environments Conference 2012).