Studi Numerik Propeller Tipe Sharrow Untuk Kapal Motor Listrik

Haryoseno, Admarch Gery (2026) Studi Numerik Propeller Tipe Sharrow Untuk Kapal Motor Listrik. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kapal motor listrik semakin banyak dikembangkan seiring meningkatnya kebutuhan akan efisiensi energi, tingkat kebisingan yang lebih rendah, serta pengurangan dampak lingkungan. Salah satu faktor utama yang memengaruhi kinerja kapal motor listrik adalah desain baling-baling (propeller) yang mampu menghasilkan gaya dorong optimal pada kondisi putaran tinggi. Penelitian ini bertujuan untuk merancang dan menganalisis kinerja hidrodinamika Sharrow propeller yang sesuai untuk aplikasi kapal motor listrik menggunakan pendekatan numerik berbasis Computational Fluid Dynamics (CFD), serta mengevaluasi pengaruh variasi kecepatan putar terhadap parameter kinerja propeller, meliputi thrust, torque, dan efisiensi, dengan mempertimbangkan variabel putaran (N), diameter (D), pitch ratio (P/D), dan expanded area ratio (Ae/A₀). Simulasi dilakukan dengan menerapkan model Open Water Test (OWT) menggunakan pendekatan Reynolds-Averaged Navier–Stokes (RANS) dengan model turbulensi k–ε. Keakuratan CFD ditunjukkan melalui perbandingan hasil simulasi propeller Wageningen B-Series dengan data eksperimen Open Water Test (OWT), yang menghasilkan selisih sebesar ±5%, sehingga model CFD yang digunakan dinilai cukup akurat. Kajian dilakukan pada empat variasi Sharrow propeller berdasarkan perbedaan tebal dan lebar bilah, yaitu Sharrow Propeller Tebal 25 lebar 60, Sharrow Propeller Tebal 25 lebar 70, Sharrow Propeller Tebal 30 lebar 60, dan Sharrow Propeller Tebal 30 lebar 70. Simulasi dilakukan pada aliran seragam dengan kecepatan 5,144 m/s dan variasi kecepatan putar propeller dari 1500 hingga 3900 RPM. Parameter kinerja yang dianalisis meliputi advance coefficient (J), coefficient thrust (K_T), coefficient torque (K_Q), dan Open Water efficiency (η_0). Hasil penelitian menunjukkan bahwa variasi geometri Sharrow propeller memberikan pengaruh signifikan terhadap karakteristik kinerja hidrodinamika. Dari empat variasi yang dianalisis, Sharrow propeller tebal 25 lebar 60 menunjukkan kebutuhan torsi yang lebih rendah pada putaran tinggi dengan nilai efisiensi yang tetap kompetitif. Dibandingkan dengan propeller konvensional Wageningen B-Series B3-35, konfigurasi ini menghasilkan gaya dorong yang sebanding pada beban torsi yang lebih kecil. Pada nilai advance coefficient J ≤ 0,5, terjadi perpotongan (crossover) karakteristik K_T, η_0, dan koefisien torsi antara Sharrow propeller dan B-Series, di mana Sharrow propeller tebal 25 lebar 60 mempertahankan nilai K_T dan η_0 yang relatif tinggi dengan kebutuhan torsi yang lebih rendah. Kondisi ini menunjukkan kesesuaian kinerja Sharrow propeller untuk operasi kapal motor listrik pada putaran tinggi dengan keterbatasan torsi motor.
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Electric motor-driven vessels are increasingly developed in response to the growing demand for higher energy efficiency, lower noise levels, and reduced environmental impact. One of the key factors influencing the performance of electric vessels is the design of the propeller, which must be capable of generating sufficient thrust under high rotational speed conditions. This study aims to design and analyze the hydrodynamic performance of a Sharrow propeller for application in electric motor vessels using a numerical approach based on Computational Fluid Dynamics (CFD), as well as to evaluate the effect of rotational speed variations on propeller performance parameters, including thrust, torque, and efficiency, while considering rotational speed (N), diameter (D), pitch ratio (P/D), and expanded area ratio (Ae/A₀). The simulations were conducted by applying the Open Water Test (OWT) model using the Reynolds-Averaged Navier–Stokes (RANS) approach with the k–ε turbulence model. The accuracy of the CFD model was assessed by comparing the simulation results of the Wageningen B-Series propeller with experimental OWT data, yielding a deviation of approximately ±5%, indicating that the CFD model is sufficiently accurate. The study examined four variations of the Sharrow propeller based on differences in blade thickness and width, namely Sharrow Propeller Thickness 25 Width 60, Thickness 25 Width 70, Thickness 30 Width 60, and Thickness 30 Width 70. Simulations were performed under uniform inflow conditions at a velocity of 5.144 m/s with propeller rotational speeds ranging from 1500 to 3900 RPM. The performance parameters analyzed include the advance coefficient (J), coefficient thrust (KT), coefficient torque (KQ), dan Open Water efficiency (η_0). The results indicate that variations in Sharrow propeller geometry significantly affect hydrodynamic performance characteristics. Among the four configurations analyzed, the Sharrow propeller with a blade thickness of 25 and width of 60 exhibits lower torque requirements at high rotational speeds while maintaining competitive efficiency. Compared to the conventional Wageningen B-Series B3-35 propeller, this configuration generates comparable thrust with a lower torque load. At advance coefficient values of J ≤ 0.50, a crossover in the characteristics of K_T, η_0, and torque coefficient is observed between the Sharrow propeller and the B-Series propeller, where the Sharrow propeller with thickness 25 and width 60 maintains relatively high KT and η_0 values with lower torque demand. These characteristics indicate that the Sharrow propeller is suitable for electric vessel propulsion systems operating at high rotational speeds with limited motor torque.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Computational Fluid Dynamics (CFD), Kapal Motor Listrik, Open Water Test (OWT), Sharrow Propeller, Wageningen B-Series
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM753 Propellers
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36101-(S2) Master Thesis
Depositing User:	Admarch Gery Haryoseno
Date Deposited:	04 Feb 2026 05:17
Last Modified:	04 Feb 2026 05:19
URI:	http://repository.its.ac.id/id/eprint/131974

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