Swirling flow in model of large two-stroke diesel engine

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Standard

Swirling flow in model of large two-stroke diesel engine. / Ingvorsen, Kristian Mark; Meyer, Knud Erik; Schnipper, Teis; Walther, Jens Honore; Mayer, Stefan.

Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics. 2012.

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Harvard

Ingvorsen, KM, Meyer, KE, Schnipper, T, Walther, JH & Mayer, S 2012, 'Swirling flow in model of large two-stroke diesel engine'. in Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics.

APA

Ingvorsen, K. M., Meyer, K. E., Schnipper, T., Walther, J. H., & Mayer, S. (2012). Swirling flow in model of large two-stroke diesel engine. In Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics.

CBE

Ingvorsen KM, Meyer KE, Schnipper T, Walther JH, Mayer S. 2012. Swirling flow in model of large two-stroke diesel engine. In Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics.

MLA

Ingvorsen, Kristian Mark et al. "Swirling flow in model of large two-stroke diesel engine". Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics. 2012.

Vancouver

Ingvorsen KM, Meyer KE, Schnipper T, Walther JH, Mayer S. Swirling flow in model of large two-stroke diesel engine. In Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics. 2012.

Author

Ingvorsen, Kristian Mark; Meyer, Knud Erik; Schnipper, Teis; Walther, Jens Honore; Mayer, Stefan / Swirling flow in model of large two-stroke diesel engine.

Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics. 2012.

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Bibtex

@inbook{157c82effb53464e8f7c524843d58742,
title = "Swirling flow in model of large two-stroke diesel engine",
author = "Ingvorsen, {Kristian Mark} and Meyer, {Knud Erik} and Teis Schnipper and Walther, {Jens Honore} and Stefan Mayer",
year = "2012",
booktitle = "Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics",

}

RIS

TY - GEN

T1 - Swirling flow in model of large two-stroke diesel engine

A1 - Ingvorsen,Kristian Mark

A1 - Meyer,Knud Erik

A1 - Schnipper,Teis

A1 - Walther,Jens Honore

A1 - Mayer,Stefan

AU - Ingvorsen,Kristian Mark

AU - Meyer,Knud Erik

AU - Schnipper,Teis

AU - Walther,Jens Honore

AU - Mayer,Stefan

PY - 2012

Y1 - 2012

N2 - A scale model of a simplified cylinder in a uniflow scavenged large two-stroke marine diesel engine is constructed to investigate the scavenging process. Angled ports near the bottom of the cylinder liner are uncovered as the piston reaches the bottom dead center. Fresh air enters through the ports forcing the gas in the cylinder to leave through an exhaust valve located in the cylinder head. The scavenging flow is a transient (opening/closing ports) confined port-generated turbulent swirl flow, with complex phenomena such as central recirculation zones, vortex breakdown and vortex precession. The model has a transparent cylinder five diameters long and is fitted with a static valve with a simplified geometry. The piston motion is controlled by a linear motor. The flow in the experiment has a Reynolds number of 50000 based on cylinder diameter and bulk velocity. Stereoscopic Particle Image Velocimetry (PIV) is used to investigate the scavenging flow for cases with both static and moving piston. Measurements are carried out for several cross-sectional planes covering the majority of the cylinder length. The effect of swirl intensity is investigated using four different port angles going from 0 – 30 degree. Although the flow has a relatively low swirl number of around 0.4, a central recirculation zone is observed indicating a vortex breakdown. The steady flow is also analyzed with Proper Orthogonal Decomposition (POD). The analysis reveals systematic variations in the shape and location of the vortex core. Transient measurements using phase-locked PIV are carried out with moving piston. The transient measurements reveal a violent change in flow topology as a central recirculation zone is rapidly formed, resulting in a change from large positive to negative velocities of the axial component.

AB - A scale model of a simplified cylinder in a uniflow scavenged large two-stroke marine diesel engine is constructed to investigate the scavenging process. Angled ports near the bottom of the cylinder liner are uncovered as the piston reaches the bottom dead center. Fresh air enters through the ports forcing the gas in the cylinder to leave through an exhaust valve located in the cylinder head. The scavenging flow is a transient (opening/closing ports) confined port-generated turbulent swirl flow, with complex phenomena such as central recirculation zones, vortex breakdown and vortex precession. The model has a transparent cylinder five diameters long and is fitted with a static valve with a simplified geometry. The piston motion is controlled by a linear motor. The flow in the experiment has a Reynolds number of 50000 based on cylinder diameter and bulk velocity. Stereoscopic Particle Image Velocimetry (PIV) is used to investigate the scavenging flow for cases with both static and moving piston. Measurements are carried out for several cross-sectional planes covering the majority of the cylinder length. The effect of swirl intensity is investigated using four different port angles going from 0 – 30 degree. Although the flow has a relatively low swirl number of around 0.4, a central recirculation zone is observed indicating a vortex breakdown. The steady flow is also analyzed with Proper Orthogonal Decomposition (POD). The analysis reveals systematic variations in the shape and location of the vortex core. Transient measurements using phase-locked PIV are carried out with moving piston. The transient measurements reveal a violent change in flow topology as a central recirculation zone is rapidly formed, resulting in a change from large positive to negative velocities of the axial component.

BT - Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics

T2 - Proceedings of 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics

ER -