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TECHNICAL PAPERS—SPECIAL ICE SECTION: In-Cylinder Processes

The Separation Between Turbulence and Mean Flow in ICE LDV Data: The Complementary Point-of-View of Different Investigation Tools

[+] Author and Article Information
Mario Amelio, Sergio Bova

Dipartimento di Meccanica, Università della Calabria, 87030 Rende (Cosenza), Italy

Carmine De Bartolo

Dipartimento di Ingegneria Idraulica ed Ambientale Università di Pavia, Via Abbiategrasso, 213 27100 Pavia, Italye-mail: debarto@ipv36.unipv.it

J. Eng. Gas Turbines Power 122(4), 579-587 (Jun 08, 2000) (9 pages) doi:10.1115/1.1290588 History: Received March 02, 2000; Revised June 08, 2000
Copyright © 2000 by ASME
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References

Witze, P. O., 1980, “A Critical Comparison of Hot-Wire Anemometry and Laser Doppler Velocimetry for I.C. Engine Applications,” SAE Paper 800132.
Reuss, D. L., Adrian, R. J., Landreth, C. C., French, D., and Fansler, T. D., 1989, “Instantaneous Planar Measurements of Velocity and Large-Scale Vorticity Stain Rate in an Engine Using Particle-Image Velocimetry,” SAE Paper 890616.
Witze, P. O., 1976, “Hot-Wire Measurements of the Turbulence Structure in a Motored Spark-Ignition Engine,” AIAA 14th Aerospace Sciences Meeting, Washington, D.C.
Lancaster, D. R., 1976, “Effects of Engine Variables on Turbulence in a Spark-Ignition Engine,” SAE Paper 760159.
Lancaster, D. R., Krieger, R. B., Sorenson, S. C., and Hull, W. L., 1976, “Effects of Turbulence on Spark-Ignition Engine Combustion,” SAE Paper 760160.
Rask R. B., 1984, “Laser Doppler Anemometer Measurements of Mean Velocity and Turbulence in Internal Combustion Engines,” ICALEO ’84 Conference Proceedings, Laser Institute of America, Boston.
Rask,  R. B., 1985, “Comparison of Window, Smoothed-Ensemble, and Cycle-by-Cycle Data Reduction Techniques for Laser Doppler Anemometer Measurements in a Motored IC Engine,” ASME J. Fluids Eng., 107, pp. 232–240.
Liou,  T. M., and Santavicca,  D. A., 1985, “Cycle Resolved LDV Measurements in a Motored IC Engine,” ASME J. Fluids Eng., 107, pp. 232–240.
Fansler, T. D., and French, D. T., 1988, “Cycle-Resolved Laser-Velocimetry Measurements in a Reentrant-Bowl-in-Piston Engine,” SAE Paper 880377.
Catania,  A. E., and Mittica,  A., 1989, “Extraction Techniques and Analysis of Turbulence Quantities From In-Cylinder Velocity Data,” ASME J. Eng. Gas Turbines Power, 111, pp. 466–478.
Fraser, R. A., and Bracco, F. V., 1989, “Cycle-Resolved LDV Integral Length Scale Measurements Investigating Clearance Height Scaling, Isotropy, and Homogeneity in an I.C. Engine,” SAE Paper 890615.
Fansler, T. D., 1993, “Turbulence Production and Relaxation in Bowl-in-Piston Engines,” SAE Paper 930479.
Catania, A. E., Dongiovanni, C., Mittica, A., Molina, G., and Spessa, E., 1995, “A New Test Bench for HWA Fluid-Dynamic Characterization of a Two-Valved In-Piston-Bowl Production Engine,” SAE Paper 952467.
Amelio, M., Belli, M., Bova, S., and Florio, G., 1994, “LDA Flow Field Characterization in a Motored Reciprocating Engine,” in PD-Vol. 64-8.3, Engineering Systems Design and Analysis (ESDA) Conference, ASME PD, 8 , Part C, pp. 597–604.
Lorenz, M., and Presher, K., 1990, “Cycle Resolved LDV Measurements on a Fired SI-Engine at High Data Rates Using a Conventional Modular LDV-System,” SAE Paper 900054.
Bracco, F. V., 1985, “Modeling and Diagnostics of Combustion in Spark-Ignition Engines,” Proc. of International Symposium on Diagnostics and Modeling of Combustion in Reciprocating Engines, (COMODIA 85), Tokyo, pp. 1–13.
Bendat, J. S., and Piersol, A. G., 1986, Random Data Analysis and Measurement Procedures, 2nd ed., Wiley, New York.
Heywood, J. B., 1988, Internal Combustion Engine Fundamentals, McGraw-Hill, New York.
Rask, R. B., 1981, “Comparison of Window, Smoothed-Ensemble, and Cycle-by-Cycle Data Reduction Techniques for Laser Doppler Anemometer Measurements of In-Cylinder Velocity,” in Morel, T., Lohman, R. P., and Racklay, J. M., eds., Fluid Mechanics of Combustion Systems, pp. 11–20, ASME, New York.

Figures

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Autocorrelation function. The reference point is at the middle of the compression stroke.
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ACF computed for velocity measured near the exhaust valves
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Velocity field at 270 (a) and at 450 (b) deg ABDC
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Time coherence versus degree
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Cut-off frequency obtained from the coherence-time of the autocorrelation function
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Power spectra (a) near the intake valves at 600 rpm; (b) near the intake valves at 800 rpm; (c) center of the chamber at 600 rpm; (d) near the exhaust valves at 600 rpm.
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Frequency spectrum (a) integrated spectrum (dots) and interpolating function Y(f ) (b)
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Cut-off frequency obtained from the frequency spectrum of the ensemble-averaged velocity
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Mean velocity obtained with the ensemble average and with the cycle-resolved methods.
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Comparison of velocity fluctuation intensity (ensemble-average) and uLF′2(θ̄)+uHF′2(θ̄) quantity (cycle-resolved)
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Schematic drawing of LDV test engine
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Schematic of the LDV set-up
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Velocity fluctuation peaks around the middle of the intake stroke
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Autocorrelation function. The reference point is at the middle of the intake stroke.

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