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TECHNICAL PAPERS: Internal Combustion Engines

Development of the Tracer Gas Method for Large Bore Natural Gas Engines—Part II: Measurement of Scavenging Parameters

[+] Author and Article Information
D. B. Olsen, G. C. Hutcherson, B. D. Willson, C. E. Mitchell

Engines and Energy Conversion Laboratory, Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523

J. Eng. Gas Turbines Power 124(3), 686-694 (Jun 19, 2002) (9 pages) doi:10.1115/1.1454117 History: Received July 01, 2000; Revised August 01, 2001; Online June 19, 2002
Copyright © 2002 by ASME
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References

Olsen, D. B., Hutcherson, G. C., Willson, B. D., and Mitchell, C. E., 2000, “Development of the Tracer Gas Method for Large Bore Natural Gas Engines: Part 1—Method Validation,” Proceedings ASME Spring Technical Conference, ICE-Vol. 34-1, Paper No. 2000-ICE-255.
Boyer, R. L., Craig, D. R., and Miller, C. D., 1953, “A Photographic Study of Events in a 14-in. Two-Cycle Gas-Engine Cylinder,” Trans. ASME, Paper No. 53-S-45.
Olsen,  Daniel B., Holden,  Jason C., Hutcherson,  Gary C., and Willson,  Bryan D., 2001, “Formaldehyde Characterization Utilizing In-Cylinder Sampling in a Large Bore Natural Gas Engine,” ASME J. Eng. Gas Turbines Power, 123, 669–676.
Schoonover, R. C., 1995, “Development of a Turbocharger Simulation Package and Applications to Large Bore Engine Research,” Masters thesis, Colorado State University.
Potter, C. R., 1995, “The Design and Development of an Independent Large Bore, Natural Gas, Engine Test Facility,” Masters thesis, Colorado State University.
Fanick, E. R., Dietzmann, H. E., and Urban, C. M., 1988, “Emissions Data for Stationary Reciprocating Engines and Gas Turbines in Use by the Gas Pipeline Transmission Industry,” American Gas Association, Report No. PR-15-613.
Gyssler, G., 1965, “Problems Associated With Turbocharging Large Two-Stroke Diesel Engines,” Proc. CIMAC, Paper B.16.
Houtsma, C. G., et al., 1950, “Correlation of Scavenging Ratio and Scavenging Efficiency in 2-Stroke Compression-Ignition Engine,” Thesis, Massachusetts Institute of Technology, Cambridge, MA.

Figures

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Methods of scavenging two-stroke engines.
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Schnürle-type loop scavenging: intake flow is directed upward and away from the exhaust port
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Trapping efficiency versus speed
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Scavenging efficiency versus speed
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Trapping efficiency versus intake manifold pressure
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Scavenging efficiency versus intake manifold pressure
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Trapping efficiency versus exhaust manifold pressure for back pressure valve variations at constant intake manifold pressure (25 kPag)
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Trapping efficiency versus exhaust manifold pressure for back pressure valve variations at constant intake manifold pressure (34 kPag)
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Scavenging efficiency versus exhaust manifold pressure for back pressure valve variations at constant intake manifold pressure (25 kPag)
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Scavenging efficiency versus exhaust manifold pressure for back pressure valve variations at constant intake manifold pressure (34 kPag)
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Nitrous oxide TGM trapped equivalence ratios for variations in speed
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Nitrous oxide TGM trapped equivalence ratios for variations in intake manifold pressure
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Nitrous oxide TGM trapped equivalence ratios for variations in exhaust back pressure at two boost levels
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Fixture implemented to block one or two of the intake ports
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Port blockage fixture installed in cylinder
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Nitrous oxide TGM measurements of trapped equivalence ratio and scavenging efficiency versus percent of intake port blockage

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