Analisis Pengaruh Cyclone Intake Manifold Terhadap Proses Pembakaran Pada Mesin Diesel Dengan Metode CFD

Rahman, Fathur (2026) Analisis Pengaruh Cyclone Intake Manifold Terhadap Proses Pembakaran Pada Mesin Diesel Dengan Metode CFD. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Mesin diesel banyak digunakan di kapal karena efisiensi termal dan keandalannya yang tinggi. Distribusi aliran dalam proses pembakaran mesin diesel pada konfigurasi standar cenderung bersifat laminer atau searah. Inovasi teknologi pada sistem pembakaran mesin diesel dilakukan untuk meningkatkan proses pencampuran bahan bakar udara yang homogen. Analisis penggunaan Cyclone intake Manifold bertujuan untuk mengetahui pengaruh distribusi aliran dan Indicated Mean Effective Pressure (IMEP) dengan simulasi ANSYS FORTE (CFD). Penelitian ini juga divalidasi dengan penelitian eksperimen yang dilakukan di Laboratorium Marine Power Plant Institut Sepuluh Nopember Surabaya. Simulasi numerik ini membantu mengetahui secara visual pengaruh Cyclone Intake manifold pada proses pembakaran mesin diesel kapal terhadap distribusi aliran fluida. Dari hasil simulasi terbukti secara signifikan mengubah karakteristik aliran udara di dalam saluran masuk dari yang awalnya cenderung searah menjadi pusaran turbulen. desain cyclone paling optimal model 11560 mampu meningkatkan Turbulent Kinetic Energy (TKE) secara masif hingga 11,20% dibandingkan dengan mesin kondisi standar (baseline). Peningkatan nilai IMEP sebesar 4,88% pada putran mesin rendah yaitu 1600 rpm. Cyclone berhasil menciptakan pusaran udara (turbulensi) yang membuat atomisasi bahan bakar lebih merata. Hal ini dibuktikan dari adanya tren peningkatan tekanan maksimal dan temperatur maksimal pembakaran di semua rentang putaran mesin yang diuji 1600, 1800, dan 2000 rpm. Efek cyclone memberikan lonjakan pada proses pembakaran yang paling signifikan peningkatan suhu hingga 2,43% dan tekanan hingga 1,08% ketika mesin beroperasi pada putaran 1600 rpm.
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Diesel engines are widely used in ships due to their high thermal efficiency and reliability. Flow distribution during the combustion process in a standard diesel engine configuration tends to be laminar or unidirectional. Technological innovations in diesel engine combustion systems are aimed at improving the homogeneous mixing of fuel and air. The analysis of the Cyclone intake manifold aims to determine the effects of flow distribution and Indicated Mean Effective Pressure (IMEP) using ANSYS FORTE (CFD) simulation. This study was also validated through experimental research conducted at the Marine Power Plant Laboratory of the Sepuluh Nopember Institute in Surabaya. This numerical simulation helps visually demonstrate the effect of the cyclone intake manifold on the combustion process in marine diesel engines with respect to fluid flow distribution. The simulation results demonstrate that the airflow characteristics within the intake duct are significantly altered, shifting from an initially unidirectional flow to a turbulent vortex. The most optimal cyclone design, Model 11560, is capable of massively increasing Turbulent Kinetic Energy (TKE) by up to 11.20% compared to the standard engine condition (baseline). There was a 4.88% increase in IMEP at low engine speeds, specifically at 1,600 rpm. The cyclone successfully created air vortices (turbulence) that resulted in more uniform fuel atomization. This is evidenced by the trend of increasing maximum pressure and maximum combustion temperature across all tested engine speed ranges.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	mesin diesel kapal, cyclone, intake manifold, komputasi dinamika fluida, distribusi aliran, ship diesel engine, cyclone, intake manifold, computational fluid dynamic, flow distribution
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ797 Diesel motor--Fuel systems--Testing. V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36101-(S2) Master Theses
Depositing User:	Fathur Rahman
Date Deposited:	04 Aug 2026 07:36
Last Modified:	04 Aug 2026 07:36
URI:	http://repository.its.ac.id/id/eprint/143871

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