Three-Dimensional Modeling of the In-Cylinder Gas Exchange Processes in a Uniflow-Scavenged Two-Stroke Engine

870596

02/01/1987

Event
SAE International Congress and Exposition
Authors Abstract
Content
A three-dimensional computer code was used to model the gas exchange processes in a uniflow-scavenged two-stroke diesel engine. The results show two recirculation regions, one near the cylinder axis and the other near the cylinder wall. These regions entrain residual gases and affect scavenging. Increasing the intake port flow angle (relative to purely radial flow) increases the size of the recirculation region near the axis and decreases the size of the recirculation region near the wall resulting in net improvements in the scavenging and other related efficiencies. This finding is similar to that made in an earlier two-dimensional study. The scavenging flow field inside the cylinder has many similarities with the flow field established by a strongly swirling confined jet.
Meta TagsDetails
DOI
https://doi.org/10.4271/870596
Pages
24
Citation
Diwakar, R., "Three-Dimensional Modeling of the In-Cylinder Gas Exchange Processes in a Uniflow-Scavenged Two-Stroke Engine," SAE Technical Paper 870596, 1987, https://doi.org/10.4271/870596.
Additional Details
Publisher
Published
Feb 1, 1987
Product Code
870596
Content Type
Technical Paper
Language
English