Influence of piston displacement on the scavenging and swirling flow in two-stroke diesel engines
Publication: Research › Conference abstract for conference – Annual report year: 2012
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Influence of piston displacement on the scavenging and swirling flow in two-stroke diesel engines. / Obeidat, Anas; Haider, Sajjad; Ingvorsen, Kristian Mark; Meyer, Knud Erik; Walther, Jens Honore.
2012. Abstract from 23rd Nordic Seminar on Computational Mechanics, Stockholm, Sweden.Publication: Research › Conference abstract for conference – Annual report year: 2012
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TY - ABST
T1 - Influence of piston displacement on the scavenging and swirling flow in two-stroke diesel engines
A1 - Obeidat,Anas
A1 - Haider,Sajjad
A1 - Ingvorsen,Kristian Mark
A1 - Meyer,Knud Erik
A1 - Walther,Jens Honore
AU - Obeidat,Anas
AU - Haider,Sajjad
AU - Ingvorsen,Kristian Mark
AU - Meyer,Knud Erik
AU - Walther,Jens Honore
PY - 2012
Y1 - 2012
N2 - We study the effect of piston motion on the in-cylinder swirling flow in a low speed, large two-stroke marine diesel engine. The work involves experimental, and numerical simulation using OpenFOAM platform, Large Eddy Simulation was used with three different models, One equation Eddy, Dynamic One equation Eddy, and Ta Phouc Loc model, to study the transient phenomena of the flow. The results are conducted at six cross sectional planes along the axis of the cylinder and with the piston displaced at four fixed piston positions covering the air intake ports by 0%,25%, 50%, and 75% respectively, for the fully opened case LES model with 8/12 million mesh points were used. We find that the flow inside the cylinder changes as the ports are closing, from a Rankine/Burger vortex profile to a solid body rotation while the axial velocity profiles change from a wake-like to a jet-like profile.
AB - We study the effect of piston motion on the in-cylinder swirling flow in a low speed, large two-stroke marine diesel engine. The work involves experimental, and numerical simulation using OpenFOAM platform, Large Eddy Simulation was used with three different models, One equation Eddy, Dynamic One equation Eddy, and Ta Phouc Loc model, to study the transient phenomena of the flow. The results are conducted at six cross sectional planes along the axis of the cylinder and with the piston displaced at four fixed piston positions covering the air intake ports by 0%,25%, 50%, and 75% respectively, for the fully opened case LES model with 8/12 million mesh points were used. We find that the flow inside the cylinder changes as the ports are closing, from a Rankine/Burger vortex profile to a solid body rotation while the axial velocity profiles change from a wake-like to a jet-like profile.
KW - Diesel engine
KW - Swirl
KW - Scavenging
KW - LES simulation
ER -