Analisis Numerik Pengaruh Tip Winglet Model CLT (Contracted And Loaded Tip) Terhadap Karakteristik Open Water Propeller Tipe Gawn Series

Firdaus, Alif Iman (2026) Analisis Numerik Pengaruh Tip Winglet Model CLT (Contracted And Loaded Tip) Terhadap Karakteristik Open Water Propeller Tipe Gawn Series. Other thesis, Institut Teknologi Sepuluh Nopember.

This is the latest version of this item.

[thumbnail of 5018201070-Undergraduate_Thesis.pdf] Text
5018201070-Undergraduate_Thesis.pdf
Restricted to Repository staff only
Download (11MB) | Request a copy

Abstract

Propeller merupakan komponen utama sistem propulsi kapal yang berfungsi mengubah daya putar mesin menjadi gaya dorong. Penelitian ini menganalisis pengaruh modifikasi tip winglet model Contracted and Loaded Tip (CLT) terhadap karakteristik open water propeller tipe Gawn Series untuk kapal cepat patroli 60 m. Analisis dilakukan secara numerik menggunakan metode Computational Fluid Dynamics (CFD) dengan pendekatan Moving Reference Frame (MRF), model turbulensi SST k-ω, dan putaran konstan sebesar 2.132 rpm. Tiga model yang dianalisis meliputi Gawn Series dengan diameter 116,43 mm, CLT L_{t}3,32 mm dengan diameter aktual 113,67 mm, dan CLT L_{t}6,64 mm dengan diameter aktual 110,91 mm. Perbedaan diameter menyebabkan nilai advance coefficient aktual setiap model berbeda meskipun kecepatan aliran dan putaran yang digunakan sama. Perbandingan pada kondisi mendekati J=0,1 menggunakan data aktual pertama masing-masing model, sedangkan nilai K_{T}\ dan K_{Q\ }pada J=0,3, 0,5, 0,7, 0,9, dan 1,1 diperoleh melalui interpolasi linier. Efisiensi dihitung kembali berdasarkan nilai K_{T}\ dan K_{Q\ }hasil interpolasi. Hasil penelitian menunjukkan bahwa CLT 3,32 mm meningkatkan K_{T}\ sebesar 11,30%–21,52% dan K_{Q\ }sebesar 13,00%–18,28% terhadap model dasar, dengan perubahan efisiensi antara penurunan 1,65% dan peningkatan 2,76%. CLT 6,64 mm meningkatkan K_{T\ }sebesar 23,35%–41,68% dan K_{Q\ }sebesar 28,55%–41,26%, tetapi menghasilkan efisiensi yang lebih rendah pada sebagian besar kondisi perbandingan. Berdasarkan keseimbangan antara koefisien gaya dorong, koefisien torsi, dan efisiensi, model CLT 3,32 mm memberikan karakteristik performa yang lebih baik dibandingkan CLT 6,64 mm pada kondisi simulasi open water.
=====================================================================================================================================
A propeller is a component of a ship propulsion system that converts rotational power into thrust. This study investigated the effect of a Contracted and Loaded Tip (CLT) winglet modification on the open-water characteristics of a Gawn Series propeller for a 60 m fast patrol vessel. The analysis used Computational Fluid Dynamics (CFD), the Moving Reference Frame (MRF) approach, the SST k-ωturbulence model, and a rotational speed of 2,132 rpm. Three models were evaluated: the baseline Gawn Series propeller with a diameter of 116.43 mm, the 3.32 mm CLT model with an actual diameter of 113.67 mm, and the 6.64 mm CLT model with an actual diameter of 110.91 mm. Because the actual diameters differed, each model produced different advance coefficient \left(J\right)\ values. Comparisons were conducted at J=0.1,0.3,0.5,0.7,0.9,and 1.1using the first data point to represent J≈0.1and linear interpolation of K_{T}\ and 10K_{Q\ }for J=0.3–1.1. Efficiency was recalculated from the interpolated coefficients. The 3.32 mm CLT model increased K_{T}\ by 11.30%–21.52% and 10K_{Q}by 13.00%–18.28% relative to the baseline, while its efficiency ranged from a 1.65% decrease to a 2.76% increase. The 6.64 mm CLT model increased K_{T}\ by 23.35%–41.68% and 10K_{Q}by 28.55%–41.26%, but had lower efficiency at J=0.3–0.9. Compared with the 3.32 mm CLT model, its efficiency decreased by 0.14%–2.84%. Therefore, the 3.32 mm CLT model provided the best balance between thrust coefficient, torque requirement, and efficiency under relatively uniform, calm open-water conditions.

Item Type: Thesis (Other)
Uncontrolled Keywords: advance coefficient, computational fluid dynamics, contracted and loaded tip, gawn series, open water propeller, efisiensi propeller, advance coefficient, computational fluid dynamics, contracted and loaded tip, gawn series, open-water propeller, propeller efficiency
Subjects: V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM161 Ships--Hydrodynamics
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM753 Propellers
Divisions: Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User: Alif Iman Firdaus
Date Deposited: 05 Aug 2026 01:33
Last Modified: 05 Aug 2026 01:33
URI: http://repository.its.ac.id/id/eprint/143692

Available Versions of this Item

Actions (login required)

View Item View Item