Physical model experimental study of hydrodynamic forces on submarine piggyback pipeline under wave-current coexisting action

CHENG Xiaofei; WANG Yongxue; WANG Guoyu

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CHENG Xiaofei, WANG Yongxue, WANG Guoyu. Physical model experimental study of hydrodynamic forces on submarine piggyback pipeline under wave-current coexisting action[J]. Haiyang Xuebao, 2012, 34(4): 172-180.

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Physical model experimental study of hydrodynamic forces on submarine piggyback pipeline under wave-current coexisting action

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

Received Date: 2011-10-25
Rev Recd Date: 2012-02-12

Abstract

Abstract

Physical model experiments are conducted to study the hydrodynamic characteristic of submarine piggyback pipeline under regular wave-current and irregular wave-current actions.Based on Morison equation, drag coefficient C_D, inertia coefficient C_M and lift coefficient C_L(C_L⁺,C_L^-) are obtained with the method of "equivalent diameter". In the experiments, effects of current ratio U_c/U_w, gap ratio between the large pipeline and the seabed e/D and spacing ratio between the large pipeline and the small pipeline G/D on the hydrodynamic coefficients of submarine piggyback pipeline are investigated. The results indicate that the hydrodynamic coefficients decrease with the increase of U_c/U_w.The effect of the seabed on the hydrodynamic forces on the piggyback pipeline is pronounced for e/D<0.5.C_D,C_M and C_L⁺ decrease with the increase of e/D,and |C_L^-| increases with the increase of e/D. In addition, the interaction between the large pipeline and the small pipeline is not negligible.C_D,C_M and |C_L^-| decrease with the increase of G/D,and C_L⁺ increases with the increase of G/D.
- wave-current,
- submarine piggyback pipeline,
- force coefficients

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References(14)

References

KALGHATGI S G, SAYER P G. Hydrodynamic forces on piggyback pipeline configurations[J]. Journal of Waterway, Port, Coastal, and Ocean Engineering, ASCE, 1997, 123(1): 16-22.

KAMARUDIN M H, THIAGARAJAN K P, CZAJKO A. Analysis of current-induced forces on offshore pipeline bundles // Proceedings of the Fifth International Conference on CFD in the Process Industries,Vol.1 CSIRO Australia,2006: 1-6.

ZHAO M, CHENG L, TENG B. Numerical modeling of flow and hydrodynamic forces around a piggyback pipeline near the seabed[J]. Journal of Waterway, Port, Coastal, and Ocean Engineering, ASCE, 2007, 133(4): 286-295.

ZHAO M, CHENG L. Numerical modeling of local scour below a piggyback pipeline in currents[J]. Journal of Hydraulic Engineering, ASCE, 2008, 134(10): 1452-1463.

CHENG X F, WANG Y X, WANG G Y. The effect of the seabed proximity on the hydrodynamic forces of the piggyback pipeline under wave action // Proceeding of 30th International Conference on Ocean, Offshore and Arctic Engineering,Vol.4.New York, OMAE,2011, 4: 95-100.

马良, 王金英, 孙绍述, 等. 海底(子-母)管道在波浪作用下水动力载荷的实验研究[J]. 大连大学学报, 1993, 3(4): 54-63.

李玉成, 张宁川, 孙姎. 近海底子母管系统在不规则波与水流共同作用下的升力[J]. 中国海洋平台, 1993,8(5): 198-202.

李玉成, 张宁川, 孙姎. 波流共同作用下近底子母管线的水动力特征[J]. 水动力学研究与进展:A,1994,9(1): 51-59.

李玉成. 波流共同作用下的波浪要素[J]. 大连工学院学报, 1982,21(4): 81-91.

赵德庭,任佐皋. 近底管线上的波浪力[J]. 海洋学报,1991,13(3): 393-400.

李玉成, 陈兵, 王革. 波浪对海底管线作用的物理模型实验及数值模拟研究[J]. 海洋通报, 1996,15(4): 58-65.

YU Y X, SHI X. Hydrodynamic coefficients for grouping piles under the action of irregular waves[J]. China Ocean Engineering, 1994, 8(2): 123-134.

JARNO-DRUAUX A, SAKOUT A, LAMBERT E. Interference between a circular cylinder and a plane wall under waves[J]. Journal of Fluids and Structures, 1995, 9: 215-230.

ZHAO M, CHENG L, TENG B, et al. Hydrodynamic forces on dual cylinders of different diameters in steady current[J]. Journal of Fluids and Structures, 2007, 23, 59-83.

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