Heave plates – the influence of the plate-diameter-to-cylinder-diameter ratio, holes, and pitch on the hydrodynamic coefficients

• Autorzy: Ciba Ewelina , Dymarski Paweł , Grygorowicz Mirosław

Identyfikatory

DOI

10.2478/pomr-2025-0019

• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of calculations of the hydrodynamic coefficients of the heave plate using RANSECFD (Reynolds-Averaged Navier-Stokes Equations - Computational Fluid Dynamic). The obtained values were confirmed by research results available in the literature and were used to draw new conclusions on the studied issue. The calculations were performed for a wide range of Keulegan Carpenter (KC) numbers from 0.15−6.2. Plates with different plate-diameter-to-cylinder-diameter ratios (Dp/Dc = [1.4;2;4;6]) were tested, and it was found that for a KC number < 2, the greatest damping occurs for plates with a Dp/Dc ratio > 4, while for a KC number > 4.5, the opposite situation occurs and one can observe a higher damping coefficient and a lower plate diameter ratio. The influence of holes evenly distributed in a circular array in the plate on the values of hydrodynamic coefficients was investigated; for a KC number < 2, they cause an increase in the damping coefficient, but they should be used on plates with a higher plate-diameter-to-cylinder-diameter ratio. Moreover, it was shown that in the case of the combined motion of heave + pitch, the obtained values of the damping coefficient are lower than in the case of isolated motion, and it was suggested that this could be prevented by using an additional vertical plane at the edge of the plate to prevent the vortices from sliding off the plate surface.

Słowa kluczowe

EN

heave plate; damping coefficient; floating offshore wind turbines; FOWT

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2025
• Tom: nr 2
• Strony: 38--49
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Ciba Ewelina

• Institute of Naval Architecture, Gdańsk University of Technology, Gdańsk, Poland

• https://orcid.org/0000-0002-9042-5234

autor

Dymarski Paweł

• Institute of Naval Architecture, Gdańsk University of Technology, Gdańsk, Poland

• https://orcid.org/0000-0002-6033-0461

autor

Grygorowicz Mirosław

• Institute of Naval Architecture, Gdańsk University of Technology, Gdańsk, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki i promocja sportu (2025).