In addition to the frequently used statistical ensemble-average, non-Reynolds filtering operators have long been proposed for nonstationary turbulent quantities. Several techniques for the reduction of velocity data acquired in the cylinder of internal combustion reciprocating engines have been developed by various researchers in order to separate the “mean flow” from the “fluctuating motion,” cycle by cycle, and to analyze small-scale engine turbulence by statistical methods. Therefore a thorough examination of these techniques and a detailed comparison between them would seem to be a preliminary step in attempting a general study of unconventional averaging procedures for reciprocating engine flow application. To that end, in the present work, five different cycle-resolved data reduction methods and the conventional ensemble-average were applied to the same in-cylinder velocity data, so as to review and compare them. One of the methods was developed by the authors. The data were acquired in the cylinder of a direct-injection automotive diesel engine, during induction and compression strokes, using an advanced hot-wire anemometry technique. Correlation and spectral analysis of the engine turbulence, as determined from the data with the different procedures, were also performed.
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July 1989
Research Papers
Extraction Techniques and Analysis of Turbulence Quantities From In-Cylinder Velocity Data
A. E. Catania,
A. E. Catania
Dipartimento di Energetica, Politecnico di Torino, Turin, Italy
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A. Mittica
A. Mittica
Dipartimento di Energetica, Politecnico di Torino, Turin, Italy
Search for other works by this author on:
A. E. Catania
Dipartimento di Energetica, Politecnico di Torino, Turin, Italy
A. Mittica
Dipartimento di Energetica, Politecnico di Torino, Turin, Italy
J. Eng. Gas Turbines Power. Jul 1989, 111(3): 466-478 (13 pages)
Published Online: July 1, 1989
Article history
Received:
August 1, 1988
Online:
October 15, 2009
Connected Content
A companion article has been published:
Vibration of Tube Bundles in Two-Phase Cross-Flow: Part
3—Turbulence-Induced Excitation
Citation
Catania, A. E., and Mittica, A. (July 1, 1989). "Extraction Techniques and Analysis of Turbulence Quantities From In-Cylinder Velocity Data." ASME. J. Eng. Gas Turbines Power. July 1989; 111(3): 466–478. https://doi.org/10.1115/1.3240277
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