JoKHeR: NPSE Simulations of Hypersonic Crossflow Instability
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Transition prediction and control are critical enablers for hypersonic flight and there is a need for physics-based approaches, especially for three-dimensional (3-D) boundary layers. A nonlinear parabolized stability equation (NPSE) capability for quasi 3-D geometries, called JoKHeR, has been developed. The NPSE approach for modeling stability and transition is particularly attractive since it includes curvature, nonparallel, and nonlinear effects at a fraction of the resources required for a direct numerical simulation (DNS). Results for the crossflow instability on the much studied 7 degree half angle cone yawed to 6 degrees at Mach 6 are presented. Steady basic state calculations are obtained with Pointwise and GASP. New methods for determining crossflow vortex trajectories as well as wave number variations along the trajectory are proposed. Verification with prior results including a DNS is shown. Copyright © 2012 by the American Institute of Aeronautics and Astronautics, Inc.
author list (cited authors)
Kuehl, J., Perez, E., & Reed, H.