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1

Numerical study of effect of trim on performance of 12500DWT cargo ship using RANSE method

Chuan Tran Quoc, Phuong Nguyen Kim, Tu Tran Ngoc, Quan Mai Van, Anh Nguyen Duy, Le Tat-Hien

Polish Maritime Research

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2022

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nr 1

3--12

EN

This paper deals with the results of studying the effect of trim on the performance of series cargo ship 12500DWT in full scale at two operating conditions by using the RANSE method. The Body Force Propeller method is used to simulate a rotating propeller behind the ship. The numerical predicted results at the ballast condition were verified and validated with sea trial data. The ship’s engine power curves for different trim conditions at two operating conditions were carried out to produce a data source to evaluate the effect of trim on the performance of the 12500DWT cargo ship. The results indicate that if the ship operates under optimum trim conditions, this can decrease the ship’s engine power in a range from 2.5 to 4.5% depending on different loading conditions and ship speeds. Finally, the paper also provides detailed differences in flow around the ship due to trim variation to explain the physical phenomenon of changing ship performance.

2

Modelling of Some Stealth Features for a Small Navy Ship at the Concept Design Stage

Formela N., Gerigk M. K.

Logistics and Transport

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2014

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Vol. 24, No. 4

21--30

EN

In this paper the basic research problems associated with modelling the basic stealth features for a small navy ship at the concept design stage are introduced. Amongst the major stealth features considered are: the modification of the immersed ship hull form by a rapid change of the ship loading condition, and modification of the ship boundary layer by the hull skin cover. The other stealth features of the ship are not presented in this paper as they do not refer to the ship hydromechanics. The research method is based on the navy ship risk assessment and assessment of the ship performance. The risk may be estimated according to a proposed risk model. The risk assessment may be done according to the risk matrix criteria. The ship performance assessment is based on modification of the immersed ship hull form and modification of the ship boundary layer. Some elements of the research method and mathematical model for estimating the ship performance are introduced in the paper. In general, the research is associated with the interdisciplinary investigations and multi-criteria ship design. The problems presented in the paper follow the Ph.D. research conducted at the Faculty of Ocean Engineering and Ship Technology at Gdańsk University of Technology.

3

Modelling of some stealth features for a small navy ship at the concept design stage - part II

Szulist N.

Journal of Polish CIMAC

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2014

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Vol. 9, no 3

101--110

EN

In the paper a few problems associated with modelling the basic stealth features for a small ship at the concept design stage are introduced. One problem concerns the modification of the immersed ship hull using the rapid change of the ship loading condition. The second is associated with the modification of the ship boundary layer by the hull skin cover. The other stealth features of the ship are not presented in this paper. The research method is based on the risk assessment and assessment of the ship performance. The risk may be estimated according to a proposed risk model. The risk assessment can be done according to the risk matrix criteria. The ship performance assessment is based on modification of the ship hull position on the water surface and modification of the ship boundary layer. Some elements of the research method and mathematical model for estimating the ship performance are introduced in the paper. Generally, the research is associated with the interdisciplinary investigations and multi-criteria ship design. The problems presented in the paper follow from the a Ph.D. research conducted at the Faculty of Ocean Engineering and Ship Technology Gdańsk University of Technology.

4

Prediction of ship performance in the risk based DSS beds in SafePort European project

Abramowicz-Gerigk T., Burciu Z.

Journal of KONBiN

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2010

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No. 1 (13)

7-16

EN

The paper presents the program of experimental investigations of ship performance prepared to obtain and confirm the models introduced in decision support system BEDS (Berthing and Entry Decision Support System) developed within SafePort European Project. Copyright Š 2010 Journal of KONBiN.

PL

W artykule przedstawiono program badań eksperymentalnych zachowania się statku przygotowany w celu opracowania i weryfikacji modeli zastosowanych w systemie wspomagania decyzji BEDS (Berthing and Entry Decision Support System), opracowanym w ramach projektu europejskiego SafePort.