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Experimental and numerical studies on added resistance of ship in oblique sea conditions

Authors
Park, Dong-MinLee, Jae-HoonJung, Yoo-WonLee, JaehoonKim, YonghwanGerhardt, Frederik
Issue Date
15-8월-2019
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Added resistance; Oblique seas; Strip method; Rankine panel method; Self-propulsion test; Captive test
Citation
OCEAN ENGINEERING, v.186
Journal Title
OCEAN ENGINEERING
Volume
186
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/330
DOI
10.1016/j.oceaneng.2019.05.052
ISSN
0029-8018
Abstract
In this paper, the added resistance of a large tanker is estimated experimentally and numerically in oblique sea. Experiments on ship motion response and added resistance in oblique sea are performed in the SSPA seakeeping basin. The experiments are conducted using the self-propulsion test for seven wave directions between 180 degrees and 0 degrees. In the self-propulsion test, the added resistance is estimated from the difference between the thrust of the propeller in calm water and waves. In the case of the head sea, the results are compared with those obtained from the captive test at the towing test of Seoul National University. As numerical method, two methods are selected: the strip method and the 3D Rankine panel method. The maximum value of the added resistance is observed between the incident wave directions of 180 degrees and 150 degrees. From 120 degrees, the added resistance tends to decrease and the peak of the added resistance shifted to the short waves. Through the two numerical analysis methods, the tendency of added resistance and the cause of the change of the added resistance in the oblique sea are investigated.
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