Experimental investigation of added frictional resistance by paint rough surface using a rotating cylinder
Experimental investigation of added frictional resistance by paint rough surface using a rotating cylinder
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使用旋转滚筒涂漆粗糙表面增加摩擦阻力的实验研究
DOI:
10.1007/s00773-020-00717-6
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发表时间:
2020
影响因子:
2.6
通讯作者:
Katsui Tokihiro
中科院分区:
文献类型:
--
作者:
Mieno Hirohisa;Katsui Tokihiro
Ship hull paint roughness considerably affects ship’s resistance. During the ship design stage, the added resistance coefficient, ΔCF, is used as the parameter of added resistance due to roughness. ΔCFis commonly estimated by the ITTC1978 formula usingKsas the roughness parameter.Ksis measured as the average hull roughness (AHR). AHR is composed of the average ofPt50values (difference between the maximum peak height and the maximum valley depth in the evaluation length of 50 mm) collected from multiple locations on the ship’s hull. However, it has been indicated that not only the roughness height parameter but also the wavelength parameter can affect frictional resistance. In this study, we try to develop a new method for estimating the added frictional resistance using the rotating cylinder test. The relation between the friction increase rate (FIR) (%) and the roughness Reynolds number (k+) is investigated. FIR (%) is dependent not only on the height parameter but also on the wavelength parameter. The projected area of the “cones” above the non-effective thickness,δs, to stream direction per unit area,Aall, which is called the cone projected area (CPA), is calculated using the roughness parameterRc(i.e., the average height of roughness components) and the wavelength parameterRSm(i.e., the average length of roughness components). The strong positive correlation between the FIR (%) and CPA is confirmed. Using this relationship, the FIR (%) of the roughness cylinder can be easily estimated fromRc,RSm, andδs.
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影响因子:
2.6
作者:
Hirohisa Mieno;T. Katsui
通讯作者:
T. Katsui
影响因子:
0.4
作者:
M. Candries;M. Atlar
通讯作者:
M. Atlar
影响因子:
0.8
作者:
H. Sasajima;E. Yoshida
通讯作者:
E. Yoshida
DOI:
--
发表时间:
1989
期刊:
--
影响因子:
--
作者:
Cen;C. Lin;J.
通讯作者:
J.
DOI:
10.2534/jjasnaoe1952.1965.58
发表时间:
1965
期刊:
Journal of Zosen Kiokai
影响因子:
--
作者:
H. Sasajima;T. Terao;Koichi Yoko;M. Nakato;A. Ogawa
通讯作者:
A. Ogawa