Wave forces on horizontal cylinders at low keulegan-carpenter and reynolds numbers

Wataru Koterayama, Changhong Hu

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

6 被引用数 (Scopus)

抄録

Hydrodynamic forces on a horizontal cylinder with circular and elongated rectangular cross-section in regular waves are studied experimentally and numerically. In the laboratory experiment, the cylinder is fixed beneath waves with its axis parallel to the wave crests. The kinematics of the wave flow are determined from linear wave using measured wave height and period, and the experiment is conducted at low Kc and relatively low Re values (Kc < 6 and 10,000 < Re < 30,000). In addition, we present a numerical simulation method for a two dimensional flow around a cylinder undergoing orbital motion in still water. Results on the horizontal cylinder show that the trend of both drag and inertia coefficients is quite different from those obtained from planar oscillatory flow test (or a vertical cylinder). From the numerical simulation it is found that vortex shedding begins at about Kc = 1.5 for a circular cylinder in orbital motion, much smaller than that in planar oscillation. For the elongated rectangular cylinder, the force coefficients are much more complicated than the circular cylinder because the flow always separates. It is found that the forces on a elongated rectangular cylinder fixed in waves are generally much larger than that harmonically oscillating in still water at the same Kc and Re numbers.

本文言語英語
ホスト出版物のタイトル5th International Offshore and Polar Engineering Conference, ISOPE 1995
出版社International Society of Offshore and Polar Engineers
ページ189-195
ページ数7
ISBN(印刷版)1880653168
出版ステータス出版済み - 1995
イベント5th International Offshore and Polar Engineering Conference, ISOPE 1995 - The Hague, オランダ
継続期間: 6 11 19956 16 1995

出版物シリーズ

名前Proceedings of the International Offshore and Polar Engineering Conference
1995-June
ISSN(印刷版)1098-6189
ISSN(電子版)1555-1792

その他

その他5th International Offshore and Polar Engineering Conference, ISOPE 1995
Countryオランダ
CityThe Hague
Period6/11/956/16/95

All Science Journal Classification (ASJC) codes

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

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