Particle image velocimetry (PIV) was used to study the velocity field characteristics in motored two-stroke ported engines. Measurements of the two-dimensional velocity field were made at the midplane of the clearance volume for bowl-in-head and disk combustion chamber geometries. Measurements were also obtained for two scavenging port geometries, i.e. a loop-scavenged engine and a loop-scavenged engine with a boost port. Results from this study show that in-cylinder geometry had a dominant effect on the flow structure observed at TDC. For example, with the boost-port scavenging crankcase, the disk-shaped chamber showed a turbulent flow-field at TDC with little large scale motion. In contrast, addition of a squish flow from the bowl-in-head geometry produced an organized cross-chamber flow.
Velocity Field Characteristics in Motored Two-Stroke Ported Engines. (Reannouncement with New Availability Information)
1992
14 pages
Report
No indication
English
Reciprocation & Rotating Combustion Engines , Fluid Mechanics , Combustion chambers , Engines , Addition , Chambers , Clearances , Combustion , Contrast , Crankcases , Disks , Flow , Flow fields , Geometry , Images , Loops , Measurement , Motion , Particles , Scale , Structures , Turbulent flow , Two dimensional , Velocity , Volume , Reprints , Velocity distribution
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