PROPELLER JET FLOW, PILE SUPPORTED PIERS AND SEA BED INTERACTION
ICCE 2016 Cover Image
PDF

Keywords

Propeller Jet Flow
Pile
Local Scour

How to Cite

Tan, R. I., Yuksel, Y., & Celikoglu, Y. (2017). PROPELLER JET FLOW, PILE SUPPORTED PIERS AND SEA BED INTERACTION. Coastal Engineering Proceedings, 1(35), structures.45. https://doi.org/10.9753/icce.v35.structures.45

Abstract

In maritime trade, from all over the world, transportation performed over the seas has been rapidly increasing due to high technological improvements leading the ships to have huge power and high speeds. The approach of even the big ships to the piers is now done by using the ship's own engine power without the help of tugs because of the operation and economic reasons. However; this has been observed to cause local scour around the piers. Local scour commonly defined as the scour which is occurred in the immediate vicinity of the hydraulic structures due to the direct impact of the structure on the flow. It is very important to reduce local scour caused by ships propeller jets. A thorough understanding of the erosion of the bed due to local scour remains a challenge since it is associated with a highly turbulent flow field. The propeller jet has 3D flow area and high velocities. The erosion problem around the berthing structures due to propeller jet can occur in three ways. These are; a) On a slope, b) At the bottom of vertical wall, c) Around piles. In this study, propeller jet flow was considered to investigate scour formations around piles with non-cohesive sediment bed. The scour mechanism induced by propeller jet with and without pile conditions were investigated experimentally and their comparisons were made. Because there was not enough study for the scouring process for pile type berthing structures under propeller jet flow in the literature.
https://doi.org/10.9753/icce.v35.structures.45
PDF

References

Hong, J.H., Chiew Y.M., Cheng N.S. 2013. Scour Caused by a Propeller Jet, Journal of Hydraulic Engineering, ASCE, 139:1003-1012.

Akib S., Jahangirzadeh A., Basser H. 2014. Local scour around complex pier groups and combined piles at semi-integral Bridge, J. Hydrol. Hydromech.,62, 2014, 2, 108-116.

Chin C.O., Chiew Y. M., Lim S. Y, Lim F. H. 1996. Jet Scour Around Vertical Pile, J. Waterway, Port, Coastal, Ocean Eng., 122:59-67.

Yuksel Y., Kayhan S., Çelikoğlu Y., Cihan K. 2012. Open Type Quay Structures Under Propeller Jets, ICCE 2012, Santander, Spain.

Lam W., Hamill G.A., Robinson D.J., Raghunathan S. 2011. A rewiev of the equations used to predict the velocity distrubition within a sihp's propeller jet, Applied Ocean Research, 38:1-10.

Albertson M. L and Jensen R. A. 1951. Diffusion on Submerged Jet, Transactions of the American Society of Civil Engineers, 1950, Vol. 115, 665-693.

Van Rijn L. C. 2013. Local Scour near Structures, www.leovanrijn-sediment.com, 29.03.2015.

Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.