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Instability process in low Reynolds number supersonic jets (1980)

Mclaughlin, D. K. ; Morrison, G. L.

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Publication Date: 2019-06-27

Description: The objective of the present research was to characterize the instability of supersonic jets of Mach numbers 1.4, 2.1, and 2.5 in the Reynolds number range around 8000. In this Reynolds number range the jet instability has its maximum coherence so that its properties as well as the acoustic properties can be most clearly identified. Growth rate, wavelength, and wave orientation of dominant spectral components of the instability for the three Mach number jets were measured in order to characterize the instability. The saturation and subsequent decay on the instability are coincident with a drastic decrease in the coherence of the instability. Associated research shows that the phenomenon of rapid growth and decay is of fundamental importance in the noise generation process.

Keywords: AERODYNAMICS

Type: AIAA Journal; 18; July 198

Format: text

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