Effect of Spoilers on Scour at Submarine Pipelines
Publication: Journal of Hydraulic Engineering
Volume 118, Issue 9
Abstract
This paper investigates the effect of a spoiler on local scour around submarine pipelines. Experiments conducted in a unidirectional flow show that the spoiler is capable of increasing both the scour depth beneath (tunnel erosion) and downstream of (lee erosion) the pipeline. The increase is related to the location of the spoiler compared with the direction of the incoming flow. The spoiler attached on top of the pipeline is effective in increasing the blockage to the incoming flow, which deflects a large proportion of the flow downward beneath the pipe, resulting in an increased scour depth. The increase in lee erosion, due to the protrusion of the spoiler above the pipeline, is important in the stimulation of the self-burial potential of the submarine pipeline. Spoilers attached to the lower half of the pipeline effected the formation of a wake zone beneath the pipe, which acts to deflect the flow downward, causing the formation of a deeper tunnel scour hole.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Chiew, Y. M. (1990). “Mechanics of local scour around submarine pipelines.” J. Hydr. Engrg., ASCE, 116(4), 515–529.
2.
Chiew, Y. M. (1991a). “Flow around horizontal circular cylinder in shallow flows.” J. Wtrwy., Port, Coast, and Oc. Engrg., ASCE, 117(2), 120–135.
3.
Chiew, Y. M. (1991b). “Prediction of maximum scour depth at submarine pipelines.” J. Hydr. Engrg., ASCE, 117(4), 452–466.
4.
Hulsbergen, C. H. (1984). “Stimulated self‐burial of submarine pipelines.” Proc. 16th Offshore Tech. Conf., Houston, Texas, OTC 4667, 171–178.
5.
Hulsbergen, C. H. (1986). “Spoilers for stimulated burial of submarine pipelines.” Proc. 18th Offshore Tech. Conf., Houston, Texas, OTC 5339, 441–444.
6.
Hulsbergen, C. H., and Bijker, R. (1989). “Effect of spoilers on submarine pipelines stability.” Proc. 21st Offshore Tech. Conf., Houston, Texas, OTC 6154, 337–350.
7.
Ibrahim, A. (1986). “Scour around pipeline under marine environments,” Ph.D. thesis, University of Newcastle upon Tyne, at Newcastle upon Tyne, England.
8.
Mao, Y. (1986). “The interaction between a pipeline and an erodible bed.” Series Paper No. 39, Inst. of Hydrodyn. and Hydr. Engrg., Tech. Univ. of Denmark, Lyngby, Denmark.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 118 • Issue 9 • September 1992
Pages: 1311 - 1317
Copyright
Copyright © 1992 ASCE.
History
Published online: Sep 1, 1992
Published in print: Sep 1992
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.