Nonlinear Nonmodal Analysis of Hypersonic Flow over Blunt Cones

What is it about?

This work extends the previously studied linear nonmodal analysis and demonstrates the application of the nonlinear nonmodal analysis to a high-speed blunt cone configuration with reduced transition N-factor and investigates the nonlinear interaction of nonmodal planar entropy-layer disturbances with modal planar Mack-mode (MM) instabilities. We have demonstrated that the EL disturbances excited near the nose tip can excite the high-frequency MM disturbances and hence, can lead to a reduction in the transition N-factor.

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