Hermaputra, Virendra Maulana (2025) Studi Numerik Pengaruh Geometri Exhaust Pipe Terhadap Karakteristik Aliran Buangan Mesin Four-Stroke (Studi Kasus Pada Mesin Modifikasi Four-Stroke Honda GL). Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Engine modification to improve performance, especially on motorcycles like the Honda GL, is a common practice that is often not accompanied by an optimal exhaust system design. (Issue) The trial-and-error design of exhaust pipes often neglects the characteristics of exhaust gas flow, potentially causing excessive back pressure, a decrease in volumetric efficiency, and the risk of engine component damage. (Urgency) This research aims to quantitatively analyze the influence of exhaust pipe geometry changes on the characteristics of exhaust gas flow to obtain the most efficient design. (Methodology) This study was conducted using the Computational Fluid Dynamics (CFD) numerical method with Ansys Fluent software and the k-ω SST turbulence model to simulate the exhaust gas flow. (Parameters) Five variations of geometric designs were analyzed by differentiating key parameters, namely pipe diameter (32mm, 35mm, 38mm), bend radius, and bend angle (110°, 120°, 130°). (Results) The simulation results will present data in the form of pressure distribution, pressure drop, velocity profiles, and visualization of secondary flow (Dean Vortex) for each design. (Discussion) By comparing the flow characteristics of the five designs, this research will identify the geometric configuration that produces the minimal pressure drop without sacrificing flow velocity. These findings are expected to provide a scientifically-based design guide for engine modification practitioners to maximize performance and durability . Keywords: Exhaust pipe, Computational Fluid Dynamics (CFD), pressure distribution, velocity profile, pressure drop.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery | ||||||||
| Divisions: | Faculty of Engineering > Departement of Mechanical Engineering | ||||||||
| Depositing User: | Virendra Maulana Hermaputra | ||||||||
| Date Deposited: | 05 Nov 2025 01:41 | ||||||||
| Last Modified: | 05 Nov 2025 01:41 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/46106 |
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