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All Journal International Journal of Marine Engineering Innovation and Research
Arif Winarno
Universitas Hang Tuah
Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Implementation of Kaplan Type Ducted Propeller on Hydrodynamics of Offshore Supply Vessel (OSV) Gedhe Angkoso Nur Sofa Sakti; Arif Winarno
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 2 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i2.4998

Abstract

When operating at sea, a reliable ship must meet the planned service speed using a propulsion system. One type of propulsion system used is a ducted propeller, which is a type of propeller equipped with a channel in the form of a foil that surrounds the propeller to form a tube (nozzle). This nozzle has the ability to increase the value of thrust and torque, so that its application can increase thrust and torque compared to a propeller without a nozzle. This study aims to determine the application of the kort nozzle with MARIN foil nozzle types 19A, 22, 24 on the Ka-40 propeller on the Offshore Supply Vessel (OSV) ship using the Computational Fluid Dynamic (CFD) method. This study obtained results from all models with the model with the highest thrust force is the 19A nozzle model with a value of 367,413.41 N, while the model with the lowest thrust force is model 24 with a value of 356,314.9 Nm. From these results, it can be concluded that the relationship between the length of the kort nozzle and the thrust force is inversely proportional, that is, the greater the length of the kort nozzle used, the smaller the thrust force value produced. Likewise, the relationship between the length of the kort nozzle with torque is also inversely proportional, that is, the greater the length of the kort nozzle used, the smaller the torque value produced.
The Effect Of Wave Length And Amplitude on The Hydrodynamic Characteristics of Waste Collection Vessels Using Computational Fluid Dynamics (CFD) Erik Sugianto; Hadi Prasutiyon; Arif Winarno; Muhammad Khasroni Hamsah
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 4 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.5077

Abstract

The continuous flow of marine debris in the sea has been a problem until now. Previous research on garbage collection vessels was conducted in calm water conditions, without waves and waves due to wind. This is different from the real conditions in the sea which are choppy and bumpy. In addition, research on the effect of wave length and amplitude on marine debris collection on garbage collection vessels does not yet exist. This study aims to determine the effect of wave length and amplitude on velocity contours, flow patterns, and ship resistance. The ship uses a circular hollow wing conveyor. Modelling using Rhinocheros software, then numerical simulation using Computational Fluid Dynamic (CFD). Verification of the simulation process uses grid independent by varying the mesh size, then validation of the results is done by comparing with previous experimental research. The results show that the best velocity contour in front of the conveyor is at a ship speed of 1.028 m/s (2 knots) using an amplitude of 0.5 T and a wavelength of 0.5 L. The velocity value in front of the conveyor is 1.551 m/s. This affects the speed of collecting marine debris. This affects the speed of collecting marine debris. The model that has a laminar flow pattern at the bow and at the stern is a speed of 1 knot at an amplitude variation of 0.1 T and a wavelength of 0.1 L. This is the best because it is easy to collect garbage. The smallest drag is the speed of 0.514 m/s (1 knot) at amplitude variation of 0.1 T and wavelength of 0.1 L. At this condition, the fuel consumption is the least. Thus, the greater the wavelength and amplitude of the waves the greater the drag and the smaller the speed.
Planning of a Hybrid Propulsion System for Purse Seine Fishing Vessels in Mayangan, Probolinggo, East Java Hadi Prasutiyon; Arif Winarno; Semin; Toto Soeharmono; Erik Sugianto
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 3 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i3.5111

Abstract

The Mayangan Beach Fisheries Port (BFP) in Probolinggo City is a fishing port that was established using a combination of funds from the APBN, APBD of East Java province and APBD of Probolinggo city. Equipped with basic and functional facilities to support various fishing activities, fishing vessels generally use a mechanical propulsion system driven by a diesel engine. The results of the government's decision to increase fuel prices by 8,000 rupiah per liter, were then supported by a survey which showed that fishermen needed as much as 110 liters of fuel for a journey of approximately one hour for one trip, with these conditions making fishermen, especially in the Mayangan district, Probolinggo very objection by increasing the price of fuel that will be used to go to sea, so that with the problems complained of by fishermen on the Mayangan coast, Probolinggo about rising fuel prices, this refers to researchers planning a hybrid propulsion system to reduce consumption of the use of fuel that will be used for purse seine fishing boats. The results showed that the main engine specifications for the Mitsubishi ship were 6D24-Mpt (A) with 228 Kw power, then the Yanmar Ytg 15 Tlv generator, while the electric motor specifications that would be used were Weg Tru Metric 132 Kw / 175 HP, as well as batteries for storing battery energy which had specifications J185-Agm Vrla Agm / Non-Spillable. The difference in fuel consumption in the conventional system and the hybrid system looks quite significant. Using a hybrid propulsion system can produce fuel savings of up to 30% when compared to using a conventional engine.
Co-Authors Erik Sugianto Gedhe Angkoso Nur Sofa Sakti Hadi Prasutiyon Muhammad Khasroni Hamsah Semin Toto Soeharmono