The Effect of Mewis Duct Energy Saving Device to Propeller Performance

Trimulyono, Andi; Mulyatno, Imam Pujo; Rachmat, Alif Fauzan

doi:10.1088/1755-1315/1098/1/012076

Cited by 1 publication

(1 citation statement)

References 7 publications

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“…However, in contrast, the efficiency value had the opposite trend. The efficiency was at its lowest at J = 0.1, increased at J = 0.5 with an efficiency value of 0.427, and peaked at 0.640 at J = 0.9 [40]. The visualization of pressure on the Ka4-70 propeller with Divergent Boss Cap Fins reinforced the results of the CFD simulation in Figure 35.…”

Section: Propeller Efficiencysupporting

confidence: 61%

Influence Evaluation of Open Propellers with Boss Cap Fins: Case Studies on Types B4-70 and Ka4-70

Berlian Arswendo Adietya,

Husein Syahab,

Mahendra Indiaryanto

et al. 2024

CFDL

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Numerical analysis of fins effect on propeller performance was conducted, specifically using the B4-70 and Ka4-70 propellers. The study investigated different types of fins, including bare fins and PBCF (Propeller Boss Cap Fins) using computational fluid dynamics (CFD) simulations. The explicit algebraic stress model (EASM) based on Reynolds-Averaged Navier-Stokes (RANS) equations and turbulence modeling was employed to determine the optimal results. The main objective of this research was to enhance energy efficiency in ships by examining various open propeller configurations. The CFD simulation results for open propellers B4-70 and Ka4-70, with the addition of boss cap fins, revealed interesting phenomena. When the open propellers B4-70 and Ka4-70 were equipped with PBCF, they would experience an increase in efficiency (η0). This was because the performance of the fins functioned optimally when the advance ratio (J) is high, as evident from the high velocity values. Thus, with higher velocity and lower pressure in the boss cap region at high J values, there was an elevation in thrust force due to the reduction of hub vortex. In the case of open propeller B4-70 with added PBCF, there was an increase in the efficiency value (η0) ranging from 3% to 5% when J varied from 0 to 0.7. Similarly, for propeller Ka4-70 with the addition of PBCF, there was an increase in the efficiency value (η0) ranging from 1% to 3% when J varied from 0 to 0.7. Notably, the use of an Energy-Saving Device (ESD) in the form of PBCF can increase the efficiency of ship propeller, as reported in this paper. Consequently, these findings affirmed the reliability of the overall calculations using the CFD approach.

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Section: Propeller Efficiencysupporting

confidence: 61%