Study of in-cylinder ow structures using PIV and LES
(English)Manuscript (preprint) (Other academic)
In-cylinder ow structures have a large eect on combustion eciency and emissions. Thus, understanding these structures is of great importance in the work of reducing fuel consumption and emissions. In this paper, the in-cylinder flow is studied using stereoscopic Particle Image Velocimetry (PIV) measurements and Large Eddy Simulations (LES). The measurements and simulations have been carried out on a steady swirl test rig, commonly used to measureengine characteristics such as the swirl number. In this study, the cause of the fluctuation in swirl is explained, showing that the fluctuation can be of greater importance as compared to the mean value of the swirl number. Moreover, we show how the flow from the inlet ports are distributed.
CFD, Engine, LES, PIV
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-124234OAI: oai:DiVA.org:kth-124234DiVA: diva2:633838
FunderSwedish Energy Agency
QS 20132013-06-272013-06-272013-07-04Bibliographically approved