Hydrodynamic Forces on a Large Pipeline and a Small Pipeline in Piggyback Configuration under Wave Action
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 138, Issue 5
Abstract
Experiments on a large pipeline and a small pipeline in a piggyback configuration under regular and irregular waves are carried out. A comparison of the wave forces on the large pipeline and the small pipeline is made. The nondimensional force coefficients for the drag, inertia, and lift are obtained based on the Morison equation. The effects of the Keulegan-Carpenter (KC) number and the spacing ratio between the two pipelines on the force coefficients for the large pipeline, small pipeline, and piggyback pipeline system are investigated. The experimental results indicate that the variation tendencies of the drag coefficients and inertia coefficients with the KC number or the spacing ratio for the large pipeline, small pipeline, and piggyback pipeline system are similar. The variation tendency of the lift coefficient with the spacing ratio for the large pipeline is opposite to that for the small one.
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Acknowledgments
The writers would like to acknowledge the support from the Foundation for Innovative Research Groups of the National Natural Science Foundation of China under Grant No. 50,921,001. The writers also wish to thank Mr. G. W. Li, Mrs. Y. Sun, and Mrs. F. Jiang for their assistance in the experiment.
References
Branković, M., Zeitoun, H., Sutherland, J., and Pearce, A. (2010). “Physical modeling of hydrodynamic loads on piggyback pipelines in combined wave and current conditions.” Proc., 29th Int. Conf. on Ocean, Offshore and Arctic Eng., OMAE, New York, Vol. 5, 933–942.
Bryndum, M. B., Jacobsen, V., and Tsahalis, D. T. (1992). “Hydrodynamic forces on pipelines: Model tests.” J. Offshore Mech. Arct. Eng., 114(4), 231–241.
Dean, R. G., and Dalrymple, R. A. (1984). Water wave mechanics for engineers and scientists, World Scientific, Singapore, 300–305.
Goda, Y. (1999). “A comparative review on the functional forms of directional wave spectrum.” Coast. Eng. J., 41(1), 1–20.
Kalghatgi, S. G., and Sayer, P. G. (1997). “Hydrodynamic forces on piggyback pipeline configurations.” J. Waterway, Port, Coastal, Ocean Eng., 123(1), 16–22.
Kamarudin, M. H., Thiagarajan, K. P., and Czajko, A. (2006). “Analysis of current-induced forces on offshore pipeline bundles.” Proc., 5th Int. Conf. on CFD in the Process Industries, CSIRO, Melbourne, Australia, Vol. 1, 1–6.
Li, Y. C., Wang, F. L., and Kang, H. G. (1991). “Wave-current forces on slender circular cylinders.” China Ocean Eng., 5(3), 287–310.
Li, Y. C., and Zhang, N. C. (1994). “The hydrodynamic characteristic of submarine piggyback pipeline in wave-current coexisting field.” Proc., 4th Int. Offshore and Polar Engineering Conf., ISOPE, INIST-CNRS, Cupertino, CA, Vol. 2, 77–84.
Li, Y. C., Zhang, N. C., and Sun, Y. (1993). “The lift forces on submarine piggyback pipeline under irregular wave and current coexisting action.” China Offshore Platform, 8(5), 198–202 (in Chinese).
Ma, L., Wang, J. Y., Sun, S. S., and Xing, Z. Z. (1993). “Experimental study of hydrodynamic force loading under the action of wave current on submarine composite pipelines.” J. Dalian Univ., 3(4), 54–63 (in Chinese).
Sarpkaya, T. (1976). “Forces on cylinders near a plane boundary in a sinusoidally oscillating fluid.” ASME J. Fluids Eng., 98(3), 499–503.
Sumer, B. M., and Fredsøe, J. (1997). Hydrodynamics around cylindrical structures, World Scientific, Singapore, 140–141.
Xing, Z. Z., Sun, S. S., and Hu, Y. X. (1990). “Study of wave forces and CD, CM, CL on horizontal cylinder near the ocean bottom.” Ocean Eng., 8(3), 24–31 (in Chinese).
Yu, Y. X. (2003). Random wave and its applications to engineering, Dalian University of Technology Press, Dalian, China (in Chinese).
Yu, Y. X., and Shi, X. H. (1994). “Hydrodynamic coefficients for grouping piles under the action of irregular waves.” China Ocean Eng., 8(2), 123–134.
Zhao, M., Cheng, L., and Teng, B. (2007). “Numerical modeling of flow and hydrodynamic forces around a piggyback pipeline near the seabed.” J. Waterway, Port, Coastal, Ocean Eng., 133(4), 286–295.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 138 • Issue 5 • September 2012
Pages: 394 - 405
Copyright
© 2012 American Society of Civil Engineers.
History
Received: May 24, 2011
Accepted: Dec 15, 2011
Published online: Dec 20, 2011
Published in print: Sep 1, 2012
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