Banca de DEFESA: AUGUSTO MACIENTE SCALIONI LUIZ

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : AUGUSTO MACIENTE SCALIONI LUIZ
DATE: 29/08/2025
TIME: 14:00
LOCAL: sala 3.08 do DCTEF, na UFSJ - Campus CSA
TITLE:

EXPERIMENTAL ANALYSIS AND COMPUTATIONAL SIMULATION OF HEAT TRANSFER IN THE CYLINDER LINER OF A NON-CONVENTIONAL INTERNAL COMBUSTION ENGINE

KEY WORDS:

internal combustion engine, non-conventional, conjugate heat transfer, simulation.

PAGES: 136
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUMMARY:

Internal combustion engines have played a central role in technological development since the Industrial Revolution, being widely employed across various fields of engineering. The Otto cycle, predominant in spark-ignition engines, has undergone several modifications over time. Among these innovations, the concept of fixed-piston engines stands out, in which the cylinder liner of the combustion chamber performs a reciprocating motion with the aim of reducing the mass of moving parts and increasing thermal efficiency. In this context, the use of renewable fuels has gained prominence, with ethanol being considered a promising alternative for application in this type of engine. The construction of this unconventional engine requires the adaptation of components from conventional engines, demanding detailed analysis of each element to ensure proper operation. Furthermore, the complex geometry of the system poses additional challenges to the cooling design, requiring an in-depth study of heat transfer in the combustion chamber. To this end, computational and analytical methods were employed using MATLAB, FEAtool, and ANSYS software, allowing the evaluation of the thermal performance of air-cooling systems with fins installed near the combustion chamber. The results indicate that the use of fins can reduce the cylinder jacket temperature by up to 80% compared to models without fins. It was also found that increasing the coolant flow velocity can reduce the temperature by up to 14%. The simulations showed good agreement with the experimental data, with the smallest deviation being 1.3%, according to the parameters adopted in this study. Thus, the work contributes significant advances to the thermal analysis of engines with non-conventional geometries, focusing on reducing the mass of moving parts and improving thermal efficiency.

BANKING MEMBERS:
Presidente - 2152276 - GUSTAVO RODRIGUES DE SOUZA
Externo ao Programa - 435055 - JOSE ANTONIO DA SILVA
Externo à Instituição - KEYLL CARLOS RIBEIRO MARTINS