Ship wake structure on the finite sea depth in the presence of wind waves

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A kinematics model of the ship wake in the presence of surface waves, generated by wind is presented. It is found that the stationary wave structure behind the ship covered a wedge region with the 16.9° half an angle at the top of the wake and only divergent waves are present in a ship wake for co propagating wind waves. Wind waves field directed at some nonzero angle to the ship motion can cause essential asymmetry of the wake and compressing of its windward half. The extension of Whitham-Lighthill kinematics theory of ship wake for the intermediate sea depth is also presented. The ship wake structure essentially depends from the Froude (Fr) number based on the value of the sea depth and ship velocity. For Froude number less than unit both longitudinal and cross waves are presented in the wake region and Kelvin wake angle increased with Fr. For Fr>1 wake angle decreased with Froude number and finally only divergent waves directed almost normally to the ship track are presented in the very narrow ship wake.

Original languageEnglish
Title of host publicationASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011
Pages691-697
Number of pages7
DOIs
Publication statusPublished - 2011 Dec 1
EventASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011 - Rotterdam, Netherlands
Duration: 2011 Jun 192011 Jun 24

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume6

Other

OtherASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011
CountryNetherlands
CityRotterdam
Period11-06-1911-06-24

Fingerprint

Ships
Froude number
Kinematics
Surface waves

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

Cite this

Yang, R-Y., Fang, M-C., & Shugan, I. V. (2011). Ship wake structure on the finite sea depth in the presence of wind waves. In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011 (pp. 691-697). (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 6). https://doi.org/10.1115/OMAE2011-49872
Yang, Ray-Yeng ; Fang, Ming-Chung ; Shugan, Igor V. / Ship wake structure on the finite sea depth in the presence of wind waves. ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011. 2011. pp. 691-697 (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE).
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Yang, R-Y, Fang, M-C & Shugan, IV 2011, Ship wake structure on the finite sea depth in the presence of wind waves. in ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011. Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, vol. 6, pp. 691-697, ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011, Rotterdam, Netherlands, 11-06-19. https://doi.org/10.1115/OMAE2011-49872

Ship wake structure on the finite sea depth in the presence of wind waves. / Yang, Ray-Yeng; Fang, Ming-Chung; Shugan, Igor V.

ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011. 2011. p. 691-697 (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 6).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Yang R-Y, Fang M-C, Shugan IV. Ship wake structure on the finite sea depth in the presence of wind waves. In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2011. 2011. p. 691-697. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE). https://doi.org/10.1115/OMAE2011-49872