Scavenging flow velocity in small two-strokes at high engine speed

Conference · Sun Dec 31 00:00:00 EST 1995

OSTI ID:253608

Ekenberg, M; Johansson, B ^[1]

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1. Lund Inst. of Technology (Sweden)

2D-LDV-measurements were made on the flow from one transfer channel into the cylinder in a small two-stroke SI engine. The LDV measuring volume was located just outside the transfer port. The engine was a carburetted piston-ported crankcase compression chainsaw engine and it was run with wide open throttle at 9000 RPM. The muffler was removed to enable access into the cylinder. No additional seeding was used; the fuel and/or oil was not entirely vaporized as it entered the cylinder. Very high velocities ({approximately}275 m/s) were detected in the beginning of the scavenging phase. The horizontal velocity was, during the whole scavenging phase, higher than the vertical.

• OSTI ID: 253608
• Report Number(s): CONF-950942-; ISBN 1-56091-673-7; TRN: IM9630%%59
• Resource Relation: Conference: Small engine technology conference and exposition, Milwaukee, WI (United States), 13-15 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the 1995 small engine technology conference: Small engines and the environment. P-292; PB: 497 p.
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
SPARK IGNITION ENGINES
COMBUSTION CONTROL
TWO-PHASE FLOW
CARBURETORS
COMPRESSIBLE FLOW