Scour below a subsea pipeline in time varying flow conditions
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- 作者：Qin Zhanga ; b ; zhangqin200000@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Scott Draperb ; c ; Liang Chengb ; Hongwei Anb
- 关键词：Time scale ; Changing flow ; Sediment transport ; Subsea pipelines
- 刊名：Applied Ocean Research
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：55
- 期：Complete
- 页码：151-162
- 全文大小：8581 K
文摘
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We conducted a series of physical experiments to investigate time scale of local scour below a subsea pipeline under changing flow condition.
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In this study, two consecutive flow conditions and uniform increasing flow conditions and backfill process are considered.
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Different arrangements of two consecutive flow conditions, and the ramp-up current flow, wave flow and combined waves and current flow are all considered.
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The algorithm to accumulate the effects of the different flow conditions is described based on recent proposed time scale formulae and present experimental data.
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The results show that the present method gives a good agreement with the measured data.