Numerical Experiment with Inviscid Vortex-Stretched Flow around a Cranked Delta Wing: Transonic Speed
A numerical method that solves the Euler equations for compressible flow is used to study vortex stretching. The particular case simulated is transonic flow M∞=0.9 α=10 deg. around the twisted and cambered cranked-and-cropped TKF delta wing of MBB. This geometry induces multiple leading-edge vortices in a straining velocity field that brings about flow instabilities but the result is a state of statistical equilibrium. The discretization contains over 600,000 cells and offers sufficient degrees of freedom in the solution to exhibit the onset of chaotic vortex flow that could well lead to turbulence. The simulated results are compared with wind-tunnel measurements.
KeywordsVortex Vorticity Compressibility Librium
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