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All Journal Prosiding Konferensi Nasional PKM-CSR Applied Science and Technology on Naval Engineering
Fajri Ashfi Rayhan
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Humanities Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Mechanical Engineering Nursing Public Health Social Sciences Other

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Journal : applied science and technology on naval engineering

 1 
Analisis Efisiensi Propeler Dengan Desain Bilah Melingkar Bima Anugerah Putra; Fajri Ashfi Rayhan
Applied Science and Technology on Naval Engineering Vol 2 No 1 (2024)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The toroidal propeller, characterized by its circular blade shape, has gained attention for its potential benefits, including increased efficiency and reduced noise levels. Despite its advantages, limited scientific literature exists on toroidal propeller research, predominantly relying on field experiments. This study seeks to assess the toroidal propeller's performance by comparing it to a conventionally shaped propeller with similar geometric parameters. Parameters such as propeller diameter, number of blades, hub diameter, and blade front view are adjusted in the conventional propeller model to mimic the toroidal design. The pitch parameter of the conventional propeller is varied to explore its ability to match the efficiency of the toroidal propeller. Utilizing Computational Fluid Dynamics (CFD) simulations through Simscale software, propeller models are evaluated across a range of RPM (1000 - 6000). The simulations yield thrust and torque values, subsequently used to calculate efficiency. Results indicate that thrust and torque increase with higher pitch and RPM. Interestingly, a variation of the conventional propeller with a pitch of 171.45 mm demonstrates superior efficiency compared to the toroidal propeller, albeit with lower thrust. Visualization of fluid flow on each model reveals optimal flow in the toroidal propeller, devoid of vorticity. This study enhances understanding of toroidal propellers, offering insights that contribute to the ongoing development of this technology.
Performance Analysis of a Contra-Rotating Propeller with a Toroidal Blade Model Muhammad Arju Muhafiz; Fajri Ashfi Rayhan
Applied Science and Technology on Naval Engineering Vol 4 No 1 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2.13475

Abstract

This research analyzes the performance of contra-rotating propellers (CRP) with toroidal blade designs and compares them to conventional CRPs to evaluate propulsion efficiency. The study is motivated by the maritime sector's need for more efficient and reliable propulsion systems. The methodology employed is Computational Fluid Dynamics (CFD) simulation, utilizing variations in RPM (1000–3000) and pitch (228.6–336 mm) to test relevant operational conditions. Key findings indicate that the contra-rotating toroidal propeller generates 16% higher thrust (reaching 3193 N at 3000 RPM) and an average thrust coefficient (KT) of 0.47, which is 17% higher than conventional CRPs. However, the efficiency of the contra-rotating toroidal propeller (average 68,7%) was 9,6% lower than the conventional CRP with a 264 mm pitch (78.31%), despite its superior absolute thrust. Fluid flow contour analysis suggests that the toroidal propeller's circular blade design creates a more stable flow pattern. The significance of this research lies in highlighting the substantial potential of contra-rotating toroidal propellers in boosting propulsion thrust, though further optimization is required for efficiency. These findings underscore the necessity for refining geometric parameters like skew and rake. This study provides a crucial foundation for the development of innovative propellers that combine the advantages of contra-rotating systems and toroidal designs, promoting more efficient and reliable propulsion solutions in the future. Keywords: Toroidal propeller, contra rotating propeller, propulsion efficiency
Co-Authors Bima Anugerah Putra Muhammad Arju Muhafiz