TY - JOUR
T1 - Two dimensional wake vortex simulations in the atmosphere: Preliminary sensitivity studies
AU - Proctor, Fred H.
AU - Hinton, D. A.
AU - Han, Jongil
AU - Schowalter, David G.
AU - Lin, Yuh Lang
PY - 1997/1/1
Y1 - 1997/1/1
N2 - A numerical Large-Eddy simulation model is currently being used to quantify aircraft wake vortex behavior with meteorological observables. The model, having a meteorological framework, permits the interaction of wake vortices with environments characterized by crosswind shear, stratification, and humidity. The addition of Grid-Scale turbulence as an initial condition appeared to have little consequence. Results show that conventional nondimensionalizations work very well for vortex pairs embedded in stably stratified flows. However, this result is based on simple environments with constant Brunt-Vaisala frequency. Results presented here also show that crosswind profiles exert important and complex interactions on the trajectories of wake vortices. Nonlinear crosswind profiles tended to arrest the descent of wake vortex pairs. The member of the vortex pair with vorticity of same sign as the vertical change in the ambient Along-Track vorticity may be deflected upwards.
AB - A numerical Large-Eddy simulation model is currently being used to quantify aircraft wake vortex behavior with meteorological observables. The model, having a meteorological framework, permits the interaction of wake vortices with environments characterized by crosswind shear, stratification, and humidity. The addition of Grid-Scale turbulence as an initial condition appeared to have little consequence. Results show that conventional nondimensionalizations work very well for vortex pairs embedded in stably stratified flows. However, this result is based on simple environments with constant Brunt-Vaisala frequency. Results presented here also show that crosswind profiles exert important and complex interactions on the trajectories of wake vortices. Nonlinear crosswind profiles tended to arrest the descent of wake vortex pairs. The member of the vortex pair with vorticity of same sign as the vertical change in the ambient Along-Track vorticity may be deflected upwards.
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M3 - Conference article
JO - 35th Aerospace Sciences Meeting & Exhibit
JF - 35th Aerospace Sciences Meeting & Exhibit
M1 - AIAA Paper 97-0056
T2 - 35th Aerospace Sciences Meeting and Exhibit, 1997
Y2 - 6 January 1997 through 9 January 1997
ER -