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Applied Science and Technology on Naval Engineering
Published by Universitas Pembangunan Nasional Veteran Jakarta
ISSN : 30318866     EISSN : 30318866     DOI : 10.54378
Core Subject : Science, Education, Engineering,
Energy Engineering Mechanical Engineering Other
Applied Science and Technology on Naval Engineering (ASTNE) is open-access journal related to Naval engineering. It is open to all students, engineers, architectures, scientists, researchers, practitioners and other scholars to publish scientific paper in ASTNE. ASTNE cover the following topics: Hydrodynamics and Stability Marine Engineering Design and Ship Optimization Maritime Technology Ocean Renewable Energy Coastal and Offshore Marine Transportation ISSN: 3031-8866 SINTA Accreditation: In Progress PUBLICATION FREQUENCY Applied Science and Technology on Naval Engineering (ASTNE) will publish two times of issues per year in February and August.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "vol 4 no 1 (2026)" : 6 Documents clear
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
ANALYSIS OF INTERCEPTOR POSITION VARIATIONS TO OPTIMIZE THE EFFECT OF RESISTANCE ON A CATAMARAN Ahmad Fadil Rahman
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.v4i2.13482

Abstract

Catamarans are multihull vessels that offer superior stability and lower resistance potential compared to monohull ships. For high-speed vessels, one method commonly used to reduce hydrodynamic resistance is the installation of an interceptor at the stern. This study aims to analyze the effect of interceptor position variations on the total resistance of a catamaran using the Computational Fluid Dynamics (CFD) method. The interceptor configurations investigated include no interceptor, full interceptor, partial near keel, and partial near side. Simulations were conducted using ANSYS Fluent with variations of Froude numbers 0,6; 0,8; 1,0; 1,2. The results indicate that total resistance increases with increasing Froude number. Among the configurations studied, The use of a full interceptor provides the lowest total resistance value with a resistance value of 13.9 N compared to other variations, although the difference is relatively small with a decrease in the resistance value of around 1,03%.. Therefore, it can be concluded that the full interceptor is the most optimal configuration for reducing the total resistance of a catamaran under the conditions examined in this study
Cavitation Analysis of a Propeller Based on Variations in Water Temperature and Propeller Rotational Speed Using CFD Simulation Dian Febriyanti
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.v4i2.13485

Abstract

This study aims to understand how the cavitation phenomenon occurs in ship propellers by varying the water flow temperature and propeller rotation speed. Cavitation is a condition in which fluid pressure decreases to below vapor pressure, so that vapor bubbles are formed that can damage the propeller surface. Therefore, it is important to conduct an analysis to find out where cavitation first appears and how it affects the thrust generated by the propeller. This study uses Computational Fluid Dynamics (CFD) software. Variations in temperature and rotational speed are applied to see the differences in the results of the propeller thrust coefficient values ​​in each condition. The simulation results show that changes in fluid temperature do not have a significant effect on the occurrence of cavitation. However, increasing the propeller rotational speed clearly increases the potential for cavitation. At a speed of 800 RPM cavitation has not been seen, either at temperatures of 17oC, 21oC, and 30oC. However, at a speed of 1600 RPM cavitation appears, both at temperatures of 17oC, 21oC, and 30oC. This shows that temperature does not have a significant effect, but rotational speed is a very influential factor in the process of cavitation and propulsion efficiency.
ANALYSIS OF MECHANICAL STRENGTH OF KEVLAR, CARBON, AND GLASS FIBER POSITIONS REINFORCED WITH EPOXY RESIN FOR FIBERGLASS SHIP HULL ZONES Khanissa Alfita Santoso Putri
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.v4i2.13487

Abstract

The use of fiber-reinforced polymer (FRP) composite materials has become a primary solution in modern ship hull construction to reduce structural weight without compromising strength. This study aims to analyze the mechanical strength characteristics of hybrid composite materials reinforced with Kevlar, carbon, and glass fibers using an epoxy resin matrix, with particular emphasis on various stacking sequence configurations. The main focus of the research is to evaluate the effect of fiber stacking order on tensile strength, yield strength, and elastic modulus. Mechanical performance was assessed through tensile testing conducted in accordance with ISO 527-4, a standard specifically intended for determining the tensile properties of unidirectional fiber-reinforced composites. Test specimens were fabricated using the hand lay-up method, with fibers uniformly oriented at a 0° direction. The results indicate that the stacking sequence configuration has a significant influence on mechanical performance. The placement of carbon fiber, which possesses a very high elastic modulus (up to 400 GPa), contributes substantially to the overall stiffness of the composite. Meanwhile, Kevlar fiber, with its high failure strain (approximately 14%), enhances the material’s energy absorption capability. This analysis provides technical recommendations for optimal fiber layer configurations, particularly for ship hull zones that require high structural strength and durability under marine environmental conditions.
PERFORMANCE ANALYSIS OF AN EXHAUST GAS RECIRCULATION SYSTEM UNDER INJECTION TIMING AND ENGINE SPEED VARIATIONS FOR EMISSION REDUCTION IN AN R180 DIESEL ENGINE Muhammad Hubaisy Al Bara
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.v4i2.13493

Abstract

In efforts to comply with increasingly stringent environmental regulations, particularly those related to nitrogen oxide (NOx) emissions, exhaust emissions from conventional diesel engines remain a major concern. The Exhaust Gas Recirculation (EGR) system is one of the most widely developed emission control techniques, functioning to reduce combustion temperature by recirculating a portion of exhaust gases back into the combustion chamber. This study employs a simulation-based approach to investigate the impact of EGR implementation on the performance and emissions of an R180 diesel engine. The objective of this research is to analyze the effects of EGR application under variations in injection timing and engine speed. Ricardo WAVE software is used to model a one-dimensional (1D) single cylinder four stroke R180 diesel engine. Injection timing is varied at several crank angles before top dead center (BTDC), along with changes in engine speed. The evaluated parameters include nitrogen oxide (NOx), carbon dioxide (CO₂), hydrocarbon (HC) emissions, and brake specific fuel consumption (BSFC). The simulation results indicate that increasing the EGR rate significantly reduces NOx emissions due to a decrease in combustion temperature. However, under certain operating conditions, variations in injection timing and engine speed significantly influence the effectiveness of the EGR system. An appropriate combination of these parameters can achieve an optimal balance between emission reduction and engine performance. This study is expected to serve as a reference for developing simulation-based emission control strategies for conventional diesel engines, particularly for small-scale applications.
A Review of Resistance of Fishing Boat Skipjack Pole and Line. Wolter Robeth Hetharia
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.v4i2.13643

Abstract

Skipjack Pole and Line Fishing Boat are designed and constructed to catch big pelagic fishes like tuna (Thunnus spp) and skipjack tuna (Katsuwonus Pelamis). Previous study executed by the authors found that there is no ship complete database and specific resistance method to find the resistance parameter at early design phase. The purpose of this study is to find a proper existing method of ship resistance to be applied for this kind of ship. The study began with collecting the existing ship database then developed ship geometry in Maxsuf Software in order to develop ship parameters including ship model for model test. Model test procedure was executing based on standard procedure of testing model in towing tank. The result of model test was compared to some possible methods for fishing ship resistance such as Holtrop, Guldhammer, and Yamagata Methods. Results of model test was extrapolated to full-scale ship. All the resistance data of approach methods were compared to those of model test. It was found from the study that for all range of ship speed the method Guldhammer was very close to the results of model test. Particularly at service speed around 9 to 11 knots the differences are 2% to 4%. It may be concluded from the study that Resistance Method of Guldhammer may be applied to estimate the resistance of Skipjack Pole and Line at early design phase

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