Studi Numerik dan Eksperimen Pengaruh Bentuk Foil Daun Propeler Terhadap Efisiensi Propeler

Hendra, Mahendra Indiaryanto (2025) Studi Numerik dan Eksperimen Pengaruh Bentuk Foil Daun Propeler Terhadap Efisiensi Propeler. Doctoral thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Beberapa penelitian telah dilakukan untuk meningkatkan efisiensi propeler B-series. Peningkatan efisiensi propeler dapat dilakukan dengan mengubah rasio camber pada foil daun propeler dalam berbagai variasi rasio camber. Perubahan ini akan mempengaruhi nilai lift dan drag pada foil daun propeler, yang selanjutnya mempengaruhi gaya dorong (thrust) dan torsi (torque) yang dihasilkan oleh propeler. Proses analisa dilakukan menggunakan kombinasi panel vortex dan teori elemen daun (blade element theory), serta dilakukan simulasi menggunakan Computational Fluid Dynamics (CFD) berdasarkan persamaan Reynolds-averaged Navier-Stokes (RANS) dan model turbulensi berupa Explicit Algebraic Stress Models (EASM). Untuk memverifikasi hasil numerik dan simulasi CFD, dilakukan pengujian model open water propeller (OWT) di Towing Tank Laboratorium Hidrodinamika BRIN. Hasil penelitian ini menunjukkan bahwa efisiensi maksimal dicapai pada rasio camber (Δ(f/c)) 2.2% untuk foil NACA 66 (Mod) dan 0.6% foil ogival dengan nilai efisiensi masing-masing 0,579 dan 0,593. Dari hasil penelitian dengan menggunakan metode Burril diagram, tidak ditemukan adanya kavitasi pada daun propeller terhadap modifikasi foil pada semua nilai rasio camber (Δ(f/c)). Untuk memprediksi Sound Pressure Level (SPL), maka digunakan metode Brown, 1977 pada semua nilai rasio camber (Δ(f/c)). Dari hasil perhitungan tersebut, diperoleh nilai SPL sebesar 126 dB hingga 132 dB.
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Several studies have been conducted to improve the efficiency of B-series propellers. Enhancing propeller efficiency can be achieved by altering the camber ratio of the propeller blade foil in various camber ratio variations. These changes affect the lift and drag forces on the propeller blade foil, which in turn influence the thrust and torque generated by the propeller. The analysis was conducted using a combination of vortex panel and blade element theory, and simulations were carried out using Computational Fluid Dynamics (CFD) based on the Reynolds-averaged Navier-Stokes (RANS) equations with an Explicit Algebraic Stress Model (EASM) turbulence model. To verify the numerical and CFD simulation results, an open water propeller (OWT) model test was performed in the Towing Tank of the BRIN Hydrodynamics Laboratory. The results of this study indicate that maximum efficiency was achieved at a camber ratio (Δ(f/c)) of 2.2% for the NACA 66 (Mod) foil and 0.6% for the ogival foil, with efficiency values of 0.579 and 0.593, respectively. Based on the Burrill diagram method, no cavitation was found on the propeller blades due to the foil modifications at all camber ratio (Δ(f/c)) values. To predict the Sound Pressure Level (SPL), Brown's method was used, 1977 at all values of camber ratio (Δ(f/c)). From the calculation results, the obtained SPL values range from 126 dB to 132 dB.

Item Type:	Thesis (Doctoral)
Uncontrolled Keywords:	Efisiensi, Kavitasi, NACA 66 (Mod), Noise, Ogival, Open water test,Rasio camber, Simulasi CFD Camber rasio, CFD simulation, Cavitation, Efficiency, NACA 66 (Mod), Noise, Ogival, Open water test
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM161 Ships--Hydrodynamics
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38001-(S3) PhD Thesis
Depositing User:	Mahendra Indiaryanto
Date Deposited:	31 Jan 2025 08:38
Last Modified:	31 Jan 2025 08:38
URI:	http://repository.its.ac.id/id/eprint/117531

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