Computational Prediction of a Propeller Performance in Open Water Condition

Fitriadhy, Ahmad; Adam, Nur Amira; Quah, C. J.

doi:10.22441/sinergi.2020.2.010

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…In addition, a comparison of blade area B-series propeller was conducted by Putra et al [4]. Moreover, the study of propeller B-series in different advanced coefficients was performed by Fitriadi et al [5]. Recently, a comparison study of propeller B-series with Kaplan using PBCF was conducted by Berlian et al [6].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Mewis Duct Energy Saving Device to Propeller Performance

Trimulyono

Mulyatno

Rachmat

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Installation of ESD (Energy Saving Device) can improve ship propulsion performance. Mewis Duct is one type of ESD (Energy Saving Device) multi-component device that combines nozzle and fin into the nozzle. The structure can minimize losses due to small losses at the ship's stern and rotational losses or loss of thrust in the slipstreams area. Mewis Duct can reduce power by about 3-8% and increase thrust on the propeller by about 2-5%. This study aims to improve the performance of the INSEAN e779a propeller type using Mewis Duct. The modified Mewis ducts are the number of fins four, five, six asymmetrical and four symmetrical fins using the computational fluid dynamics (CFD) approach. The CFD code is based on the RANS (Reynolds - Averaged Navier Stokes) equation with the turbulent model is k-ε. This study found that installing Mewis duct as ESD in a ship increased the propeller thrust by 3-5% and the torque by 3-4%.

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Section: Introductionmentioning

confidence: 99%

The Effect of Mewis Duct Energy Saving Device to Propeller Performance

Trimulyono

Mulyatno

Rachmat

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Additionally, Trimulyono [23] also employed the model variation analysis method to study the optimum thrust value of the propeller, as well as the thrust values generated by variations in angle and number of blades. Fitriadhy [24] studied the thrust, torque, and efficiency coefficients of propellers with different blade numbers in open-water conditions using the CFD method. Guo [25] used CFD and system-based methods to study the turning maneuver behavior and hydrodynamic characteristics of twin-screw ships considering hull-engine-propeller interaction, but the research object was different from the aerodynamic characteristics of coaxial contra-rotating propellers discussed in this paper.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Performance and Numerical Analysis of the Coaxial Contra-Rotating Propeller Lift System in eVTOL Vehicles

Xu,

Yu,

et al. 2024

Mathematics

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Electric vertical takeoff and landing (eVTOL) vehicles possess high payload transportation capabilities and compact design features. The traditional method of increasing propeller size to cope with high payload is no longer applicable. Therefore, this study proposes the use of coaxial counter-rotating propellers as the lift system for eVTOL vehicles, consisting of two coaxially mounted, counter-rotating bi-blade propellers. However, if the lift of a single rotating propeller is linearly increased without considering the lift loss caused by the downwash airflow generated by the upper propeller and the torque effect of the lift system, it will significantly impact performance optimization and safety in the eVTOL vehicles design process. To address this issue, this study employed the Moving Reference Frame (MRF) method within Computational Fluid Dynamics (CFD) technology to simulate the lift system, conducting a detailed analysis of the impact of the upper propeller’s downwash flow on the aerodynamic performance of the lower propeller. In addition, the aerodynamic performance indicators of coaxial counter-rotating propellers were quantitatively analyzed under different speed conditions. The results indicated significant lift losses within the coaxial contra-rotating propeller system, which were particularly notable in the lift loss of the lower propeller. Moreover, the total torque decreased by more than 93.8%, and the torque was not completely offset; there was still a small torsional effect in the coaxial counter-rotating propellers. The virtual testing method of this study not only saves a significant amount of time and money but also serves as a vital reference in the design process of eVTOL vehicles.

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“…Therefore many studies have been carried out to increase the performance of propellers, such as Trimulyono and Kiryanto made a comparison of the effect of the number of the blade and rake angle [1]. Fitriadhy et al did numerical prediction of propeller B-series in open water using CFD [2]. Moreover, there is also another way by using Energy Saving Device (ESD), which can reduce the loss of energy caused by propeller performance.…”

Section: Introductionmentioning

confidence: 99%

The effect of propeller cap angle and fin size of PBCF on propeller performance

Trimulyono

Jatmiko

Mulyatno

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The propeller was one of the main propulsors in ships that consumed a lot of fuel due to the viscous force acting in the ship. Therefore many studies have been carried out to increase the performance of ship propellers. One of the ways is using Energy Saving Device (ESD) to improve propeller performance. One of the ESD is Propeller Boss Cap Fins (PBCF). PBCF was used to improve the propeller performance by reducing the hub vortex during propeller rotation. In this study, we compare the propeller performance before and after PBCF installation without changing propeller dimensions. The variations of PBCF fins were made in 0,1D, 0,2D, and 0,3D with a combination of the angle of the propeller cap were 15° and 20°. The propeller performance is carried out with the computational fluid dynamics (CFD) method. It was made in the open water assumption to reduce of wall effect. B-series propeller is used in the present study. The validation of propeller performance is made using empirical results. This study aimed to determine the effect of the installation of PBCF on the performance of B-Series propellers on the Ro-Ro 1000 GT ship. The results show that variation with a fin diameter of 0,2D and a propeller cap of 20° can increase propeller efficiency by 0.03%. It can be concluded the addition of PBCF can improve propeller performance.

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Computational Prediction of a Propeller Performance in Open Water Condition

Cited by 5 publications

References 18 publications

The Effect of Mewis Duct Energy Saving Device to Propeller Performance

The Effect of Mewis Duct Energy Saving Device to Propeller Performance

Aerodynamic Performance and Numerical Analysis of the Coaxial Contra-Rotating Propeller Lift System in eVTOL Vehicles

The effect of propeller cap angle and fin size of PBCF on propeller performance

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