Sparsity-Promoting Dynamic Mode Decomposition Analysis on Aeroacoustics of a Clustered Supersonic Jet

Koizumi, Hiroshi; Tsutsumi, Seiji; Haga, T.

doi:10.2514/6.2017-3798

Cited by 4 publications

(1 citation statement)

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“…This distinction is perhaps less important in resonant flows than many other applications, but in regions such as the near-nozzle shear layer, identifying highly unstable but low-energy modes could still be of great value. Although less widespread than POD, DMD is now seeing application to a range of resonance problems, including screeching jets [194][195][196] and impinging jets. 20,108 5.1.3 The influence of shockwaves.…”

Section: Measuring Growth Ratesmentioning

confidence: 99%

Aeroacoustic resonance and self-excitation in screeching and impinging supersonic jets – A review

Edgington-Mitchell

2019

International Journal of Aeroacoustics

172

104

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Supersonic jets, particularly shock-containing jets, often exhibit high-intensity, discrete-frequency acoustic tones. These tones are the signature of an aeroacoustic resonance loop established by the flow. This paper considers two of the classical forms of supersonic jet resonance: screech in shock-containing free jets and tones generated by the impingement of a jet against a surface. The first half of the paper provides a historical perspective on research into both forms of resonance, ranging from the seminal works of Alan Powell to recent contributions from high-fidelity numerical simulation, experiment, and stability theory. The second half of the paper provides a critical assessment of current understanding around the four processes that characterize jet resonance: a downstream propagation of energy, an acoustic generation mechanism, an upstream propagation of energy, and a receptivity mechanism.

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