Temporal and spectral quantification of the crackle component in supersonic jet noise

Baars, W and Tinney, C 2013, 'Temporal and spectral quantification of the crackle component in supersonic jet noise', in Yu Zhou; Yang Liu; Lixi Huang and Dewey H. Hodges (ed.) Proceedings of the 2nd Symposium on Fluid-Structure-Sound Interactions and Control (FSSIC 2013), Hong Kong and Macau, 20-23 May 2013, pp. 205-210.


Document type: Conference Paper
Collection: Conference Papers

Title Temporal and spectral quantification of the crackle component in supersonic jet noise
Author(s) Baars, W
Tinney, C
Year 2013
Conference name FSSIC 2013
Conference location Hong Kong and Macau
Conference dates 20-23 May 2013
Proceedings title Proceedings of the 2nd Symposium on Fluid-Structure-Sound Interactions and Control (FSSIC 2013)
Editor(s) Yu Zhou; Yang Liu; Lixi Huang and Dewey H. Hodges
Publisher Springer Heidelberg
Place of publication New York, United States
Start page 205
End page 210
Total pages 6
Abstract Measurements of the pressure waveforms along a grid in the far-field of an unheated Mach 3 jet were conducted in order to study crackle. A detection algorithm is introduced which isolates the shock-type structures in the temporal waveform that are responsible for crackle. Ensemble averages of the structures reveal symmetric shocks at shallow angles, while they appear to be asymmetric near the Mach wave angle. Spectral quantification is achieved through timefrequency analyses and shows that crackle causes the expected high-frequency energy gain. The increase in energy due to crackle is proposed as a more reliable metric for the perception of crackle, as opposed to the Skewness of the pressure or pressure derivative.
Subjects Aerodynamics (excl. Hypersonic Aerodynamics)
Keyword(s) Mach Number
Pressure Waveform
Wavelet Power Spectrum
Shallow Angle
Temporal Waveform
DOI - identifier 10.1007/978-3-642-40371-2_30
Copyright notice © Springer-Verlag Berlin Heidelberg 2014
ISBN 9783642403705
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