A comprehensive experimental investigation of total drag and wave height of ONR Tumblehome, including uncertainty analysis

Cihad Delen*, Sakir Bal

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Özet

A comprehensive hydrodynamic investigation of the 48.9 scale ONR Tumblehome (ONRT) form has been made by experiments carried out in Ata Nutku Ship Model Testing Laboratory of Istanbul Technical University (ITU-AN). Starting from the bare hull of ONRT hull, drag tests w/or w/o rudders, shafts and brackets, and the fully appended ONRT hull have sequentially been performed in the range of Froude number, 0.16≤Fr ≤ 0.36. The repeatability of drag tests of fully appended ONRT hull has been presented by uncertainty analysis between 0.10≤ Fr ≤ 0.42. The total drag (RTM) of ONRT form with the expanded uncertainty was estimated as 4.615 ± 1.098% N at Fr = 0.20, and 11.121 0.636% N at Fr = 0.30. At Fr = 0.20, it was concluded that the total drag (RTM) of fully appended model was 79.21% bare hull, 7.10% rudders, 8.78% shafts and brackets, and 4.91% bilge keels. The drag tests of fully appended ONRT performed at ITU-AN was also compared with those of carried out at IOWA-IIHR and OU-NAOE. New wave heights at two planes (namely, y/LWL = 0.1557 and y/LWL = 0.3623) of ONRT were also measured and presented at five different Fr numbers. These measurements were compared with those of CFD performed before. A very good agreement has been obtained.

Orijinal dilİngilizce
Makale numarası115232
DergiOcean Engineering
Hacim284
DOI'lar
Yayın durumuYayınlandı - 15 Eyl 2023

Bibliyografik not

Publisher Copyright:
© 2023

Finansman

This research was supported by the Coordination Unit of Scientific Research Projects of Istanbul Technical University (Project number: MGA-2017-40961 ) and is a part of the first author's Ph.D. thesis.

FinansörlerFinansör numarası
Istanbul Teknik ÜniversitesiMGA-2017-40961

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