Banca de QUALIFICAÇÃO: PAULO RICARDO DA PENHA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : PAULO RICARDO DA PENHA
DATE: 14/03/2022
TIME: 16:00
LOCAL: REMOTA
TITLE:

DETONATION SIMULATION IN SPARK IGNITION ENGINES: CALIBRATION AND VALIDATION OF MODELS FOR E27

KEY WORDS:

Internal combustion engines; Detonation; Engine Simulation; 0D simulation

PAGES: 74
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUBÁREA: Engenharia Térmica
SUMMARY:

Internal combustion engines are still the predominant form of propulsion in small vehicles, in addition to being present in several other transport, energy generation and large work applications. According to ANFAVEA, 91% of small vehicles registered in 2019 in Brazil were equipped with spark ignition engines. Thus, the development of spark ignition engines continues to be a relevant research approach in transport and energy, seeking to increase efficiency and reduce fuel consumption and pollutant emissions. Knocking is a form of abnormal combustion that imposes severe restrictions on the efficiency of spark ignition engines. Also called knock, detonation is characterized by the propagation of supersonic shock waves that excite the engine structure and can cause severe and irreparable damage. For these reasons, detonation is a phenomenon of great importance for the development of engines and its identification represents a significant possibility of producing more efficient heat engines. The present work aims to compare methods of detection of detonation with the basic equations of computational knock models, including models used in commercial software available on the market, and to verify the possibility of calibrating these models for the presented experimental situation. For this analysis, a computational routine was written to, from experimental data of a four-cylinder engine, determine the values of three knock detection methods. The same routine uses data from the same engine to calculate three 0D models of detonation. Four operating conditions were evaluated and showed similar detonation levels, with few differences between the detection methods used. For the detonation models, however, only the Douaud model identified the detonation in all cases.

BANKING MEMBERS:
Interno - FERNANDO ANTONIO RODRIGUES FILHO
Externo à Instituição - JOSE EDUARDO MAUTONE BARROS - UFMG
Externo ao Programa - MARCIO EXPEDITO GUZZO
Presidente - THIAGO AUGUSTO ARAUJO MOREIRA