PANGESTU, RIZKY DWI (2025) Analisis Aliran Fluida Pada Single Chamber Incinerator Berkapasitas 25 kg Menggunakan Simulasi CFD (Computational Fluid Dynamics). Undergraduate thesis, UPN “VETERAN”Jawa Timur.
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Abstract
This study analyzes the fluid flow characteristics and thermal performance of a 25-kg single chamber incinerator using Computational Fluid Dynamics (CFD) simulation in ANSYS Fluent. Two combustion chamber wall materials—steel and firebrick—were evaluated to determine their influence on pressure, density, velocity, temperature, static enthalpy, and eddy viscosity throughout the combustion zone. The simulation was conducted under steady-state conditions, employing the k–ε RNG turbulence model and non-premixed combustion model to accurately capture the behavior of turbulent reacting flow. The results show that wall material variation significantly affects the internal fluid dynamics. The firebrick configuration produced higher overall pressure, with an increase of 18–27% compared to steel and a maximum recorded pressure of approximately 1.42×10⁵ Pa. Gas density also increased by 10–15% due to improved thermal retention within the chamber. Flow velocity experienced a rise of 22–30%, reaching peak values of 32–35 m/s near the outlet. Furthermore, static enthalpy increased by 12–18%, while eddy viscosity increased by 20–28%, indicating stronger turbulence and more effective gas mixing. Conversely, the average gas temperature in the firebrick configuration was 8–12% lower than in the steel configuration, with peak temperatures ranging from 1180–1230 K. This reduction was caused by the conversion of thermal energy into higher kinetic energy driven by stronger back-pressure and flow acceleration. These findings show that firebrick provides better flow stabilization and combustion efficiency, making it a more suitable wall material for smallscale incinerator applications.
| 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: | Rizky Dwi Pangestu | ||||||||
| Date Deposited: | 22 Dec 2025 04:43 | ||||||||
| Last Modified: | 22 Dec 2025 05:14 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/48214 |
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