| his dissertation is composed of two separate papers where atmospheric turbulence effects on the behavior of aircraft wake vortices are studied using a validated large eddy simulation model. Information from this study may contribute to the development of a predictor algorithm for the National Aeronautic and Space Administration's (NASA) Aircraft Vortex Spacing System (AVOSS), which will determine safe operating spacing between arriving and departing aircraft and provide a safe reduction in separation of aircraft compared to the now-existing flight rules. In the first paper (Chapter 2), the development of Crow instability in a homogeneous field of turbulence is studied. The Crow instability becomes well developed in most atmospheric turbulence levels, but in strong turbulence the vortex pair deforms more irregularily due to turbulence advection. The maximum Crow instability wavelength decreases with increasing nondimensional turbulence intensity... |
