Rudder gap cavitation: Fundamental understanding and its suppression devices

Rhee, Shin Hyung; Lee, Changmin; Lee, Hee Bum; Oh, Jungkeun

doi:10.1016/j.ijheatfluidflow.2010.02.013

Cited by 15 publications

(8 citation statements)

References 9 publications

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“…The cavitation may become less significant in the future. As Rhee et al (2010) showed, Figure 8 illustrates the typical areas of cavitation damage on a semi-skeg rudder. The damages are mainly due to the high speed near the horn and pintle section gaps, the propeller tip and hub vortex, and the propeller sheet.…”

Section: Rudder Cavitationmentioning

confidence: 99%

Sixty years of research on ship rudders: effects of design choices on rudder performance

Liu

Hekkenberg

2016

Ships and Offshore Structures

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Rudders are primary steering devices for merchant ships. The main purpose of using rudders is to generate forces for course keeping and manoeuvring. In exceptional cases, rudders are also used for emergency stopping and roll stabilisation. Furthermore, rudders affect propeller thrust efficiency and total ship resistance. Therefore, rudders are important to navigation safety and transport efficiency. The performance of rudders depends on the rudder hydrodynamic characteristics, which are affected by the design choices. Scholarly articles concerning the design of rudders date back more than 60 years. Moreover, a lot of knowledge fragments of rudders exist in literature where ship manoeuvrability and fuel consumption are discussed. It is worthwhile to gather this information not only for researchers to advance the state-of-the-art development but also for designers to make proper choices. To have a contemporary vision of the rudders, this paper presents a consolidated review of design impacts on rudder performance in ship manoeuvrability, fuel consumption, and cavitation. The discussed design choices are rudder working conditions (Reynolds numbers and angles of attack), profiles (sectional shapes), properties (area, thickness, span, chord, and rudder aspect ratios), types (the position of the stock and the structural rudder-hull connection), and interactions (among the hull, the propeller, and the rudder). Further research is suggested on high-lift rudder profiles, multiplerudder configurations and interactions among the hull, the propeller, and the rudder. Recommendations for industry practices in the selection of the rudder design choices are also given. Nomenclature Abbreviation CFD Computational Fluid Dynamics PRS Propeller-rudder systemsRe Reynolds number Greek Symbols

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Section: Rudder Cavitationmentioning

confidence: 99%

Sixty years of research on ship rudders: effects of design choices on rudder performance

Liu

Hekkenberg

2016

Ships and Offshore Structures

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“…During a survey conducted in 2010, the resistance of cast-iron against cavitation as well as the resistance of other metals except for iron against cavitation were examined and the obtained values were compared to the rates of carbon steel (Hattori and Kitagawa 2010). In a study conducted by X. Y. Li and others, the inspection and examination of using copper-manganese and aluminum alloys used for the method of welding to repair a vessel propeller exposed to cavitation was performed (Li et al 2004 and the cavitation which on the rudder tiller to the increase of cavitation in line with the acceleration of the speed of vessel were examined (Rhee et al 2010). Ahmet Celek examined and inspected the effects of pollution, corrosion and cavitation which cause energy losses in his project titled "How to avoid energy losses on vessels" in 2012 (Ç elek 2013).…”

Section: Introductionmentioning

confidence: 99%

Energy, Transportation and Global Warming

Grammelis¹

2016

Green Energy and Technology

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“…A substantial reduction in gap clearance can raise serious technical difficulties in the rudder installation processes and studies have been done to moderate the gap cavitation by other means. Rhee and Kim (2008) suggested a cam device for gap flow blocking and Paik, et al(2008), Rhee, Lee, Lee and Oh (2010), and Seo, Lee, Kim and Oh (2012) demonstrated that the device can suppress the gap cavitation through model experiments and computations. Seo, Lee, Oh and Kim (2010) showed that the jet blowing system devised for a high-lift rudder can be utilized in order to mitigate the gap cavitation of a rudder with a small amount of flow injection in the reverse direction.…”

Section: Introductionmentioning

confidence: 99%