Study of flow generated by the port in a heavy-duty diesel engine at different valve lifts using PIV
(English)Manuscript (preprint) (Other academic)
In-cylinder flow structures, also prior to ignition, have a large effect on combustion efficiency and emissions. Therefore, understanding the mechanism of formation and changes in such structures is of great importance in the work of reducing fuel consumption and emissions. Here, the flow entering the cylinder was studied using stereoscopic Particle Image Velocimetry (PIV). The measurements were carried out on a steady swirl test rig, commonly used to measure engine characteristics such as the swirl number. In this study, fluctuations in swirl coefficient were found to be greater than the mean swirl at low valve lifts, the flow was found to be Reynolds number independent and the turbulent fluctuations were observed to be axisymmetric.
Fluid Mechanics and Acoustics
Research subject Engineering Mechanics
IdentifiersURN: urn:nbn:se:kth:diva-164882OAI: oai:DiVA.org:kth-164882DiVA: diva2:806418
QS 20152015-04-202015-04-202015-04-20Bibliographically approved