Numerical Study of a Long-Lived, Isolated Wake Vortex in Ground Effect

This paper examines a case observed during the 1990 Idaho Falls Test program, in which a wake vortex having an unusually long lifetime was observed while in ground effect. A numerical simulation is performed with a Large Eddy Simulation model to understand the response of the environment in affecting this event. In the simulation, it was found that one of the vortices decayed quickly, with the remaining vortex persisting beyond the time-bound of typical vortex lifetimes. This unusual behavior was found to be related to the first and second vertical derivatives of the ambient crosswind.

[1]  Akio Arakawa,et al.  Computational Design of the Basic Dynamical Processes of the UCLA General Circulation Model , 1977 .

[2]  George F. Switzer.  Validation Tests of TASS for Application to 3-D Vortex Simulations , 1996 .

[3]  Fred H. Proctor,et al.  Within Homogeneous Turbulence: Crow Instability Large Eddy Simulation of Aircraft Wake Vortices , 2000 .

[4]  Jinhee Jeong,et al.  On the identification of a vortex , 1995, Journal of Fluid Mechanics.

[5]  Leo J. Garodz,et al.  VORTEX WAKE CHARACTERISTICS OF B757-200 AND B767-200 AIRCRAFT USING THE TOWER FLY-BY TECHNIQUE. , 1993 .

[6]  Robert E. Robins,et al.  Algorithm for Prediction of Trailing Vortex Evolution , 2001 .

[7]  Advection of Microphysical Scalars in Terminal Area Simulation System (TASS) , 2011 .

[8]  B. V. Leer,et al.  Towards the ultimate conservative difference scheme V. A second-order sequel to Godunov's method , 1979 .

[9]  F. H. Proctor,et al.  The terminal area simulation system. Volume 1: Theoretical formulation , 1987 .

[10]  N. A. Logan,et al.  Effect of Wind Shear and Ground Plane on Aircraft Wake Vortices , 1975 .

[11]  George F. Switzer,et al.  Terminal Area Simulation System User's Guide - Version 10.0 , 2014 .

[12]  Fred H. Proctor,et al.  Evaluation of Fast-Time Wake Vortex Prediction Models , 2009 .

[13]  Fred H. Proctor,et al.  Large Eddy Simulation of Aircraft Wake Vortices Within Homogeneous Turbulence: Crow Instability , 2000 .

[14]  Fred H. Proctor.  Interaction of Aircraft Wakes from Laterally Spaced Aircraft , 2009 .

[15]  B. P. Leonard,et al.  The Flux-integral Method for Multidimensional Convection and Diffusion , 1994 .

[16]  Fred H. Proctor,et al.  Numerical Simulation of Wake Vortices Measured During the Idaho Falls and Memphis Field Programs , 1996 .

[17]  J. Klemp,et al.  The Simulation of Three-Dimensional Convective Storm Dynamics , 1978 .

[18]  Fred H. Proctor,et al.  Numerical Study of Wake Vortex Interaction with the Ground Using the Terminal Area Simulation System , 1999 .

[19]  Fred H. Proctor,et al.  Crosswind Shear Gradient Affect on Wake Vortices , 2011 .

[20]  Fred H. Proctor,et al.  Wake Vortex Transport and Decay in Ground Effect: Vortex Linking with the Ground , 2000 .