Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
TEMPERATURE AND PRESSURE SENSITIVITY OF THE LAMINAR FLAME SPEED OF DIISOBUTYLENE/AIR MIXTURES
Submission Author:
Christian de Araujo , PR
Co-Authors:
Christian de Araujo, Jônatas Vicente, Amir Antonio Martins Oliveira, Ana Carolina Bueno Bontorin, Anderson Rouge dos Santos
Presenter: Jônatas Vicente
doi://10.26678/ABCM.COBEM2021.COB2021-2270
Abstract
Diisobutylene is a hydrocarbon containing two isomers, 2,4,4-trimethyl-1-pentene and 2,4,4-trimethyl-2-pentene, which is representative of the branched alkenes gasoline, and to elucidate its role as an octane rating booster it is important to evaluate its combustion characteristics like laminar flame speed (LFS). The present study aims to investigate the influence of temperature, pressure, and equivalence ratio on the LFS of diisobutylene/air mixtures. Measurements were obtained in a constant volume reactor (CVR) for initial temperatures of 420 and 460 K, initial pressures of 1, 1.5, and 2 bar, and equivalence ratios of 0.7 up to 1.4. The results presents highest LFS value for the conditions evaluated was observed for equivalence ratio of 1.0 and 1.1. The increase in temperature presented an average increase in the LFS for the fuels of 8.7 cm/s, on the other hand, the increase of 0.5 bar in the base scenario pressure presented a decrease at the LFS of 4.2 cm/s, and a pressure increase of 1 bar presented a decrease of 6.7 cm/s. The conclusions of this work rely on the influence of the temperature and pressure in the LFS. The increase in temperature results in higher values of LFS, and an increase in pressure results in the opposite, reducing the LFS. Through this work, global equations for the fuels were obtained with good agreement with the experimental results.
Keywords
Diisobutylene, Antiknock additive, laminar flame speed, Constant Volume Reactor, Primary reference fuels
