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原文传递 Mechanics of Pipeline Scour Propagation in the Spanwise Direction

题名：	Mechanics of Pipeline Scour Propagation in the Spanwise Direction
其他题名：	Cheng,L.,Yeow,K.,Zhang,Z.,and Teng,B.(2009)."Three-dimensional scour below offshore pipelines in steady currents."Coastal Eng.,56(5-6),577-590.
正文语种：	英文
作者：	Yushi Wu
关键词：	Submarine pipeline scour;Three-dimensional scour;Scour mechanics;Pressure gradient;Shear stress
摘要：	This paper presents the results of an experimental study on the mechanics of pipeline scour propagation in the spanwise direction. The experiments were conducted with uniform sediment under a unidirectional steady current in clear-water conditions. The study aims to provide a better understanding of how the differential pressure between the upstream and the downstream sides of the pipeline and local bed shear stress at the span shoulder affect pipeline scour propagation in the spanwise direction. The measured data show that a high differential pressure significantly enhances pipeline scour hole development in the spanwise direction. Its presence increases the propagation velocity of the scour hole and differentiates the rapid from the slack phase of development identified in previous studies. It may be inferred from the relationship of the propagation velocity on pressure gradient that the two factors, namely, the differential pressure and the local bed shear stress, vary proportionally with the strength of the local flow field. They combine to affect the propagation velocity of the scour hole at submarine pipelines in the spanwise direction.
出版年：	2015
论文唯一标识：	P-108Y2015V141N04003
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)WW.1943-5460.0000288
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
拼音刊名(出版物代码)：	P-108
卷：	141
期：	04
页码：	15-22