Efek Penggunaan Anti Singing Edge terhadap Performa Propeller Fast Patrol Boat

Fikry, Izzul (2023) Efek Penggunaan Anti Singing Edge terhadap Performa Propeller Fast Patrol Boat. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Propeller singing merupakan kondisi munculnya bunyi seperti gelas anggur yang berdering ketika propeller beroperasi. Singing terjadi karena resonansi antara frekuensi alami tip propeller dan pusaran Karman pada trailing edge. Singing banyak terjadi pada propeller dengan kecepataran putaran yang tinggi, serta ukuran blade yang lebar dan tipis. Adanya singing pada propeller, dapat meningkatkan noise pada kapal. Salah satu upaya untuk menanggulangi propeller singing adalah dengan menambahkan anti singing edge pada trailing edge. Menambahkan anti singing edge, juga berarti melakukan modifikasi pada propeller. Hal tersebut tentunya akan mengakibatkan perubahan pada performa propeller, khususnya thrust dan torsi. Oleh karena itu, dalam penelitian ini penulis melakukan penelitian terhadap performa propeller fast patrol boat setelah dilakukan pengaplikasian anti singing edge. Flow analysis, open water test dan self-propulsion test dilakukan dengan bantuan software berbasis computational fluid dynamic. Simulasi dilakukan pada fast patrol boat 60 meter dengan propeller Wageningen B5-105. Terdapat lima variasi modifikasi. Variasi 1, 2, dan 3 merupakan variasi penajaman, dimana lebar tip trailing edge direduksi menjadi 3.0 mm, 2.5 mm, dan 2.0 mm sesuai dengan desain anti singing Van Lammeren. Sementara itu, Variasi 4 dan 5 merupakan modifikasi penebalan, dimana tip trailing edge dipertebal sebesar 3.0 mm dan 2.0 mm. Hasil flow analysis menunjukkan bahwa variasi 1 hingga 5 dapat menanggulangi singing, dimana variasi 4 merupakan variasi terbaik untuk mengatasi singing. Selain sebagai anti singing, variasi 1, 2, dan 3 juga dapat meningkatkan performa propeller dengan menurunkan kebutuhan power, dimana variasi 3 dapat menurunkan kebutuhan power sebesar 2.54%. Sebaliknya, variasi 4 dan 5 meningkatkan kebutuhan power, dimana variasi 5 meningkatkan kebutuhan power sebesar 5.80%.
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Propeller singing sounds like a wine glass ring when the propeller is operating. Singing occurs due to resonance between the natural frequency of the propeller tip and the Karman vortices on the trailing edge. Singing often occurs in propellers with high rotational speeds and wide and thin blade sizes. The existence of singing on the propeller, can increase the noise on the ship. One of the efforts to overcome singing on the propeller is to add an anti-singing edge to the trailing edge. Adding an anti-singing edge also means modifying the propeller. This will certainly lead to changes in propeller performance, especially thrust, and torque. Therefore, in this study, the authors researched the performance of fast patrol boat propellers after applying an anti-singing edge. Flow analysis, open water tests, and self-propulsion tests were carried out with computational fluid dynamics-based software. The simulation was carried out on a 60-meter fast patrol boat with a Wageningen B5-105 propeller. There are five modification variations. Variations 1, 2, and 3 are sharpening variations, where the trailing edge tip width is reduced to 3 mm, 2.5 mm, and 2 mm according to the Van Lammeren anti-singing design. Meanwhile, Variations 4 and 5 are thickening modifications, where the tip of the trailing edge is thickened by 3 mm and 2 mm. The flow analysis results show that variations 1 to 5 can cope with singing, where variation 4 is the best variation for overcoming singing. Aside from being anti-singing, variations 1, 2, and 3 can also improve propeller performance by reducing power requirements, where variations 3 can reduce power requirements by 2.54%. On the other hand, variations 4 and 5 increase the power requirement, whereas variation 5 increases the power requirement by 5.80%.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Anti-singing edge, performa propeller, fast patrol boat, propeller performance.
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM751 Resistance and propulsion of ships V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM753 Propellers
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36101-(S2) Master Theses
Depositing User:	Izzul Fikry
Date Deposited:	12 Feb 2023 04:26
Last Modified:	12 Feb 2023 04:26
URI:	http://repository.its.ac.id/id/eprint/96861

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