A performance study on the energy recovering turbine behind a marine propeller

Lee, Kyung-Jun; Bae, Joon-Hwan; Kim, Hee-Taek; Hoshino, Tetsuji

doi:10.1016/j.oceaneng.2014.09.004

Cited by 23 publications

(11 citation statements)

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“…The existence of FGV changes the radial circulation distribution of propeller and makes the loading on the propeller blade shifted inboard. The result agrees with the conclusion of literature by Lee et al (2014), although the turbine is in free rotation. This paper calculates the average tangential induced velocities produced by the designed combined propulsor as well as the designed single propeller for one revolution along the radial direction on the disk which is 1.15D downstream from the propeller plane.…”

Section: Performance Analysissupporting

confidence: 93%

“…Designs of the upstream and downstream FGV were carried out by Glover (1991) using the lifting line theory and Gaafary and Mosaad (1991) through linearized lifting surface theory respectively. Lee et al (2014) proposed a novel energy recovering turbine behind a marine propeller having similar function to FGV. The difference is that the new device achieves the energy saving purpose by converting the propeller slipstream rotational energy to electrical energy.…”

Section: Introductionmentioning

confidence: 99%

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Wake-adapted design of fixed guide vane type energy saving device for marine propeller

Hou

Wang

et al. 2015

Ocean Engineering

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Section: Performance Analysissupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Wake-adapted design of fixed guide vane type energy saving device for marine propeller

Hou

Wang

et al. 2015

Ocean Engineering

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“…Many additional devices have been designed to improve the hydrodynamic performance and to reduce cavitation and noise. A lot of research has been done on the working mechanisms and effectiveness of these devices [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effects of a fan-shaped Mewis duct before a propeller on propulsion performance

et al. 2018

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To define the guidelines for the design of a Mewis duct for a small bulk cargo ship, a numerical study was carried out to investigate the effects of a fan-shaped Mewis duct on propeller performance of a 38,000 t bulk cargo ship with a three-blade propeller. Calculations were performed using the STAR-CCM+ software based on the solution of the Reynolds averaged Navier-Stokes (RANS) equation. Computations were carried out for a wide range of locations from 0.11D to 0.21D upstream from the propeller disc, a radius of trailing edge from 0.65R to 1.05R, and angle of attack of the inner fins, where from 0° to 10° of the fan-shaped Mewis duct, where D is the diameter of the propeller and R is the radius of the propeller. With the installation of the duct, the axial mean wake fraction on the propeller disc decreased, while the tangential mean wake fraction increased significantly. As the installation position was far away from the propeller, the axial mean wake fraction varied in a wave pattern, while the tangential mean wake fraction increased. With the increase of the radius and the angle of attack of the inner fins of the duct, the axial mean wake fraction first decreased and then increased, while the tangential mean wake fraction increased gradually. Correspondingly, the propeller force coefficients and efficiencies with the duct were all more than those without the duct and changed with the variations of the duct parameters. When the propeller and duct were taken as a propulsion system, the efficiency of the system was less than that of only the propeller. At the same time, with variations of the location, radius, and angle of attack of the inner fins of the duct, the efficiency of the system first increased and then decreased gradually, which indicates that there was an optimum design value for all of the duct parameters. Moreover, only when the design of these duct parameters are reasonable can energy savings be achieved; otherwise, the opposite effect is produced. Eventually, with the installation of the fan-shaped Mewis duct, the wake harmonic degree on the propeller disc can be significantly improved.

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“…A mismatching hub can decrease the propulsive efficiency and cavitation performance significantly. In recent years, computational fluid dynamics (CFD) techniques have been employed more and more extensively for analyzing the performance of hydrodynamic systems (Carlton, Radosavljevic, & Whitworth, 2009;Carrica, Fu, & Stern, 2011;Dubbioso, Muscari, & Mascio, 2014;Lam, Hamill, & Robinson, 2013;Lam, Robinson, Hamill, & Johnston, 2012;Shamsi, Ghassemi, Molyneux, & Liu, 2014), designing propeller ESDs (Çelik, 2007;Lee, Bae, Kim, & Hoshino, 2014;Park, Jung, & Kim, 2005) and simulating the cavitation (Rafael et al, 2015;Singhal, Athavale, Li, & Jiang, 2002;Watanabe, Kawamura, Yoshihisa, Maeda, & Rhee, 2003;Zhu & Fang, 2012). The International Towing Tank Conference (ITTC) discussed applications of the CFD method to calculating the hydrodynamic performance of propellers and believed that it could be used to obtain the open-water performance and pressure distribution of a propeller accurately (Salvatore, Streckwal, & Terwisga, 2009).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analyses of the hydrodynamic performance of propeller boss cap fins in a propeller-rudder system

Sun

Wang³

et al. 2016

Engineering Applications of Computational Fluid Mechanics

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This paper presents the simulated and experimental results of propeller-rudder systems with propeller boss cap fins (PBCFs) and analyzes the hydrodynamic performance of PBCFs in propellerrudder systems. The purpose is to study the impact of PBCFs on the hydrodynamic performance of rudders. Hydrodynamic experiments were carried out on propeller-rudder systems with PBCFs in a cavitation tunnel. The experimental energy-saving effect of the PBCF without a rudder was 1.47% at the design advance coefficient J = 0.8. The numerical simulation was based on the Navier-Stokes equations solved with a sliding mesh and the SST (Shear Stress Transfer) k-ω turbulence model. After the grid independence analysis, the flow fields of an open-water propeller with and without a PBCF were compared, then the efficiencies of the propulsion systems including different rudders and the thrust coefficient K r of rudders were analyzed. The results indicate that the installation of a PBCF increases the resistance of the rudder, which results in a reduction in the energy-saving effect of the PBCF. At the design advance coefficient, the energy-saving effect of the PBCF with an ordinary rudder and a twisted rudder decreases from 1.47% to 1.08% and 1.16%, respectively; thus, it is important to factor in the rudder of a propulsion system when evaluating the energy-saving effects of PBCFs . ARTICLE HISTORY

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A performance study on the energy recovering turbine behind a marine propeller

Cited by 23 publications

References 1 publication

Wake-adapted design of fixed guide vane type energy saving device for marine propeller

Wake-adapted design of fixed guide vane type energy saving device for marine propeller

Investigation of the effects of a fan-shaped Mewis duct before a propeller on propulsion performance

Experimental and numerical analyses of the hydrodynamic performance of propeller boss cap fins in a propeller-rudder system

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