Experimental study of the Magnus effect in cylindrical bodies with 4, 6, 8 and 10 sides

Pezzotti, Santiago; Mora, Vicente Nadal; Andrés, Ángel Sanz; Franchini, Sebastián

doi:10.1016/j.jweia.2019.104065

Cited by 11 publications

(6 citation statements)

References 17 publications

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“…3, in the course of the ship's voyage, the thrust (CT) and heel (CH) coefficients are determined by the lift (CL) and drag coefficients (CD) of the rotating cylinder and the apparent wind angle between the heading and the apparent wind speed. The equations of thrust coefficient and heel coefficient are given as follows [14] and heel coefficient are given as follows [14]:…”

Section: Geometrical Configuration Physical Modelsmentioning

confidence: 99%

“…The two r are surrounded by two 2*D rotating domains (D is the diameter of the rotating cyl The thrust (FT) and side force from the heel (FH) are calculated according to thrust coefficient (CT), heel coefficient (CH), apparent wind speed (Va) air density (ρ) and Crosssectional area of the rotating cylinder (S), according to the Eqs. ( 4) and (5) and heel coefficient are given as follows [14]:…”

Section: Computational Domain and Grid Generationmentioning

confidence: 99%

“…The two rotat installed symmetrically in the central region of the computational domain. The two r are surrounded by two 2*D rotating domains (D is the diameter of the rotating cyl (4) 7 and heel coefficient are given as follows [14]:…”

Section: Computational Domain and Grid Generationmentioning

confidence: 99%

“…Recently, an ore carrier also installed Flettner rotors to reduce fuel consumption. Related simulations and experiments on Flettner rotors have been studied by scholars [13][14][15]. Lu et al [11] proposed three wind energy utilisation technologies (Flettner rotor, wingsail and DynaRig concept) and selected an Aframax Oil Tanker as a model to compare three kinds of technologies.…”

Section: Introductionmentioning

confidence: 99%

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Assisted Propulsion Device of a Semi-Submersible Ship Based on the Magnus Effect

Lin

Zhang

et al. 2022

Polish Maritime Research

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The purpose of this study is to explore the potentiality of wind propulsion on semi-submersible ships. A new type of Flettner rotor (two rotating cylinders) system installed on a semi-submersible ship is proposed. The structure and installation of two cylinders with a height of 20 m and a diameter of 14 m are introduced. The numerical simulation of the cylinder is carried out in Fluent software. The influence of apparent wind angle and spin ratio on the two cylinders are analysed, when the distance between two cylinders is 3D-13D (D is cylinder diameter). When the distance between two cylinders is 3D, the performance of the system increases with an increase in spin ratio. Moreover, the apparent wind angle also has an effect on the system performance. Specifically, the thrust contribution of the system at the apparent wind angle of 120° is the largest at the spin ratio of 3.0. The maximum thrust reaches 500 kN. When the spin ratio is 2.5 and the apparent wind angle is 120°, the maximum effective power of the system is 1734 kW. In addition, the influence of the two cylinders distance on system performance cannot be ignored. When the distance between the two cylinders is 7D and the spin ratio is 2.5, the effective power of the system reaches a maximum, which is 1932 kW.

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Section: Geometrical Configuration Physical Modelsmentioning

confidence: 99%

Section: Computational Domain and Grid Generationmentioning

confidence: 99%

Section: Computational Domain and Grid Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assisted Propulsion Device of a Semi-Submersible Ship Based on the Magnus Effect

Lin

Zhang

et al. 2022

Polish Maritime Research

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“…It was first described by Heinrich Gustav Magnus in 1953 (Lele and Rao 2017 ; Talluri et al 2018 ). The Magnus effect correlates with the velocity and pressure of a moving fluid (Gupta et al 2017 ; Kray et al 2014 ; Pezzotti et al 2020 ). As the pressure of a moving fluid decreases, its velocity will be increased and vice versa.…”

Section: Flettner Rotors’ Principles and Fundamentalsmentioning

confidence: 99%

Harnessing wind energy on merchant ships: case study Flettner rotors onboard bulk carriers

Seddiek

Ammar

2021

Environ Sci Pollut Res

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Shipping faces challenges of reducing the dependence on fossil fuels to align with the international regulations of ship emissions reduction. The maritime industry is in urgent need of searching about alternative energy sources for ships. This paper highlights the applicability of harnessing wind power for ships. Flettner rotors as a clean propulsion technology for commercial ships are introduced. As a case study, one of the bulk carrier ships operating between Damietta port in Egypt and Dunkirk port in France has been investigated. The results showed the high influence of the interaction between ship course and wind speed and direction on the net output power of Flettner rotors. The average net output power for each rotor will be 384 kW/h. Economically, the results reveal that the use of Flettner rotors will contribute to considerable savings, up to 22.28% of the annual ship’s fuel consumption. The pay-back period of the proposed concept will be 6 years with a considerable value of levelized cost of energy. Environmentally, NO x and CO 2 emissions will be reduced by 270.4 and 9272 ton/year with cost-effectiveness of $1912 and $55.8/ton, respectively, at annual interest rate of 10%.

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An assisted propulsion device of vessel utilizing wind energy based on Magnus effect

Zhang

et al. 2021

Applied Ocean Research

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Experimental study of the Magnus effect in cylindrical bodies with 4, 6, 8 and 10 sides

Cited by 11 publications

References 17 publications

Assisted Propulsion Device of a Semi-Submersible Ship Based on the Magnus Effect

Assisted Propulsion Device of a Semi-Submersible Ship Based on the Magnus Effect

Harnessing wind energy on merchant ships: case study Flettner rotors onboard bulk carriers

An assisted propulsion device of vessel utilizing wind energy based on Magnus effect

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