In-Cylinder Flow in High Speed Two-Stroke Engines with Different Transfer Channels

970357

02/24/1997

Event
International Congress & Exposition
Authors Abstract
Content
2-D LDV measurements were performed in the cylinder of a two-stroke engine. The transfer channels of the cylinders were of two different designs: Open transfer channels and “cup handle” transfer channels. The engine was run at its rated speed, 9000 rpm.
Optical access to the cylinder was achieved by replacing the standard cylinder head with a quartz window. No addition of seeding was made, since the fuel droplets were not entirely vaporized as they entered the cylinder and thus served as seeding.
Results show that the flow out from the cup handle transfer channels is more directed away from the exhaust port, which promotes loop scavenging.
The RMS-value, “turbulence”, was low close to the transfer ports in both cylinders, but increased rapidly towards the middle of the cylinder.
Meta TagsDetails
DOI
https://doi.org/10.4271/970357
Pages
14
Citation
Ekenberg, M., and Johansson, B., "In-Cylinder Flow in High Speed Two-Stroke Engines with Different Transfer Channels," SAE Technical Paper 970357, 1997, https://doi.org/10.4271/970357.
Additional Details
Publisher
Published
Feb 24, 1997
Product Code
970357
Content Type
Technical Paper
Language
English