Numerical method for the vibration analysis of pre-swirl stator

Vladimir, Nikola; Bakica, Andro; Malenica, Šime; Im, Hong-Il; Senjanović, Ivo; Cho, Dae‐Seung

doi:10.1080/17445302.2021.1907072

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…Compared to all possible improvements with respect to marine propulsion, the ESDs provide one of the least expensive alternatives, although it should be clearly stated that not every ESD can be beneficial for a specific type of ship. Essentially, these devices recover energy losses at the vicinity of the propeller, so for each device to operate properly, there must be a specific type of energy loss present in order for the ESD operational profile to be effective [32], [33].…”

Section: The Installation Of Energy-saving Devicesmentioning

confidence: 99%

Advanced technical solutions for marine pollution control in the Adriatic Sea

Perčić¹,

Vladimir²,

Jovanović³

et al. 2022

Rad Hrvatske akademije znanosti i umjetnosti

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The major environmental problems within the maritime sector are atmospheric pollution due to the extensive use of fossil fuels in ship power systems, as well as seawater pollution from various sources (e.g. oil spills, microplastic, acidification, etc.). Due to their negative effect on the environment, human health and marine ecosystem, they should be carefully controlled. The studies on environmental problems of the maritime sector are more focused on atmospheric pollution, mainly thanks to the Paris Agreement. The ships are mostly powered by conventional power systems (diesel engines), and their negative effect on the environment would be lower with the implementation of some measures for emission reduction. In this paper, the outcomes of the research into the advanced technical measures for maritime pollution control are summarized, where the emphasis is put on ro-ro passenger ships engaged in the Croatian short-sea shipping sector. The results of the performed Life-Cycle Assessment (LCA) and Life-Cycle Cost Assessment (LCCA) suggested that conventional power systems should be modernized by ship electrification. This solution is represented as the most cost-effective and the most environmentally friendly solution regarding air pollution reduction. Furthermore, regarding seawater protection, several aspects of the advanced early warning system, that is being developed by the authors, are discussed. Finally, in line with the global trends in the maritime sector, a review on increasing the degree of autonomy of ships is given, as one of the most important topics for the near future.

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Section: The Installation Of Energy-saving Devicesmentioning

confidence: 99%

Advanced technical solutions for marine pollution control in the Adriatic Sea

Perčić¹,

Vladimir²,

Jovanović³

et al. 2022

Rad Hrvatske akademije znanosti i umjetnosti

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“…Bakica et al [18] proposed a numerical analysis method that could predict the hydrodynamic loads and structural responses of PSS. Additionally, Vladimir et al [19] proposed a numerical method for the vibration analysis of PSS. This device is also applicable to Liquefied Natural Gas (LNG), container ships, and slow-speed full-body ships such as tankers and bulkers.…”

Section: Introductionmentioning

confidence: 99%

Study on Compact Pre-Swirl Duct for Slender Aft-Body Crude Oil Carrier

Kang

Kim

Shin

2022

JMSE

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This study is a parametric investigation of the application of a compact type of pre-swirl duct for a slender aft-body 158k crude oil carrier. The International Maritime Organization (IMO) has created the Energy Efficiency Design Index (EEDI), which is an index related to carbon dioxide emissions, to enforce regulations on newly built ships; many solutions have been proposed, including an increase in propulsion efficiency. In the present study, a new type of energy-saving device (pre-swirl duct), the so-called ring stator, is proposed for 158k crude oil carriers, the hull form of which has been developed as a slender after-body full form to reduce the resistance by delaying separation. A conventional pre-swirl duct is no longer effective at the slender aft-body hull forms because of the small radial flow to the propeller. A parametric study was conducted through Computational Fluid Dynamics (CFD) analysis using the commercial program Star-CCM+, and an improvement of approximately 3% in the propulsion efficiency was achieved in the present study. The efficiency gain was validated through a comparison with the experimental results. The developed ring stator may become applicable to container ships through further parametric studies in the near future.

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