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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/17941

Title: Turbulence averaging within spark ignition engines
Authors: Sullivan, Pierre
Ancimer, Richard
Wallace, James
Keywords: Combustion
Averaging
Issue Date: Jun-1999
Publisher: Springer
Citation: DOI: 10.1007/s003480050333
Abstract: This paper examines velocity averaging within Spark-Ignition (SI) engines, a non-stationary system. Comparison is made between the mean and turbulence velocities found from (a) Ensemble, (b) Cyclic and (c) Wavelet-based averaging. The various methods of extracting turbulence within this flow system result in qualitatively similar average velocities; however, there are significant differences in the turbulence velocities and spectral content of the flow field based on the definition used. The differing interpretation of turbulence results in a subjectivity to the physical understanding of the flows. The experience in extracting coherent structures in stationary turbulence suggests that wavelet analysis offers a unique insight that has applicability for engine studies.
URI: http://hdl.handle.net/1807/17941
ISSN: 1432-1114
Appears in Collections:Department of Mechanical and Industrial Engineering

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