Akademik Veri Yönetim Sistemi
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING, cilt.44, sa.9, 2022 (SCI-Expanded)
Ethanol and petroleum-based diesel fuel (PBDF) blends have been extensively tested on diesel engines as an alternative fuel without the use of any co-solvents. However, there is not enough information about the combustion noise and products of CO2, CH4 and NH3 that are sourced from 2-butanol used as co-solvent to prevent phase separation between ethanol and PBDF. The present study aims to investigate the effect of ethanol-butan-2-ol-diesel fuel blends on combustion phenomenon and CO2, CH4 and NH3 emission characteristics under different operating conditions of diesel engine. In this study, homogeneity of ethanol and PBDF fuel mixture was achieved by using butan-2-ol (2-butanol). First, engine tests were conducted with the base calibration strategy of injection timing. Later, the tests were conducted by advancing and retarding injection timing to observe the effects of the injection timing on the combustion and emission at different engine speeds. The test results showed an increase in combustion noise with the use of alcohol-PBDF blends. In the tests, the maximum combustion noise was monitored as 92.7 dB with the use of E10B2 at the engine speed of 1400 rpm. It was observed that the use of alcohol-PBDF fuels was much more effective in reducing NH3 and CO emissions according to the change in fuel injection timing. In the tests, 50% or more reduction in CO and NH3 emissions was observed with the use of alcohol-PBDF fuel blends. It was noted that engine speed was more effective than both alcohol-PBDF blends and injection timing on the formation of CO2 emissions. It was observed that delaying the fuel injection time is more effective on NOx emissions than the use of ethanol-PBDF mixture. Moreover, it was observed that increasing ethanol ratio in fuel blend led to increase in in-cylinder gas pressure due to longer ignition delay that enables more time to fuel and air to mixture. The longest ignition delay was calculated as 9.2 degrees CA in use of E15B3 fuel at 1400 rpm.