Effect of steady boundary-layer flow on the hydrodynamic forces on a near-wall cylinder in currents

被引：1

作者：

Teng, Yunfei ^{[1
,2
,5
]}

Griffiths, Terry ^{[2
,3
]}

Cheng, Liang ^{[1
]}

Qu, Yan ^{[1
]}

An, Hongwei ^{[4
]}

Draper, Scott ^{[4
]}

Gao, Zhe ^{[1
]}

Tang, Guoqiang ^{[5
]}

Lu, Lin ^{[5
]}

机构：

[1] South China Univ Technol, Sch Marine Sci & Engn, Guangzhou 511442, Peoples R China

[2] Aurora Offshore Engn, Subiaco, WA 6008, Australia

[3] Univ Western Australia, Oceans Grad Sch, Crawley, WA 6009, Australia

[4] Univ Western Australia, Sch Engn, Crawley, WA 6009, Australia

[5] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China

来源：

OCEAN ENGINEERING | 2024年 / 313卷

基金：

中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

Hydrodynamic forces; Boundary layer flow; Subsea cables; Bottom roughness; CIRCULAR-CYLINDER; TURBULENCE;

D O I：

10.1016/j.oceaneng.2024.119338

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

In this work, experimental tests are carried out to investigate the effect of steady boundary layer flow (BLF) properties on the time-mean force coefficients of a cylinder laid on/above smooth/rough walls. Analysis based on boundary layer theory reveals that the force coefficients are influenced by the turbulence intensity, velocity gradient and dimensionless velocity deficit of the BLF. Testing results show that the force coefficients correlate best with the dimensionless velocity deficit among all the examined BLF properties. Empirical formula for quantifying the influence of velocity deficit on force coefficients are proposed based on the present test results and those reported in literature. Potential implications of the present findings on the stability design of subsea cables are discussed.

引用

页数：9

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