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- W4313236069 abstract "Screech tones in supersonic jets are underpinned by resonance between downstream-travelling Kelvin-Helmholtz waves and upstream-travelling acoustic waves. Specifically, recent work suggests that the relevant acoustic waves are guided within the jet and are described by a discrete mode of the linearised Navier-Stokes equations. However, the reflection mechanism that converts downstream-travelling waves into upstream-travelling waves, and vice versa, has not been thoroughly addressed, leading to missing physics within most resonance models. In this work we investigate the reflection and transmission of waves generated by the interaction between a Kelvin-Helmholtz wave and a normal shock in an under-expanded jet using a mode-matching approach. Both vortex-sheet and finite-thickness shear-layer models are explored, quantifying the impact of the shear layer in the reflection process. This approach could enable more quantitative predictions of resonance phenomena in jets and other fluid systems." @default.
- W4313236069 created "2023-01-06" @default.
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- W4313236069 date "2021-09-30" @default.
- W4313236069 modified "2023-10-16" @default.
- W4313236069 title "Reflection and transmission of a Kelvin-Helmholtz wave incident on a shock in a jet" @default.
- W4313236069 doi "https://doi.org/10.48550/arxiv.2109.14988" @default.
- W4313236069 hasPublicationYear "2021" @default.
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