The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission

The mixture formation prior to the ignition process plays as a key element in the diesel combustion. The objective of this research was to help an understand of the effects of air fuel mixing process during the ignition delay period and initial heat release in combustion process that strongly...

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Main Author:	Mohmad Jaat, Md Norrizam
Format:	Thesis
Language:	English English English
Published:	2020
Subjects:	TP315-360 Fuel
Online Access:	http://eprints.uthm.edu.my/907/1/24p%20MD%20NORRIZAM%20MOHMAD%20JAAT.pdf http://eprints.uthm.edu.my/907/2/MD%20NORRIZAM%20MOHMAD%20JAAT%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/907/3/MD%20NORRIZAM%20MOHMAD%20JAAT%20WATERMARK.pdf
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spelling	my-uthm-ep.9072021-09-09T02:32:55Z The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission 2020-08 Mohmad Jaat, Md Norrizam TP315-360 Fuel The mixture formation prior to the ignition process plays as a key element in the diesel combustion. The objective of this research was to help an understand of the effects of air fuel mixing process during the ignition delay period and initial heat release in combustion process that strongly affects the exhaust emissions. This study investigated effects of ambient temperature,Ti and injection pressure, Pinj on the heat release process during ignition delay periods. Rapid compression machine (RCM) was used to simulate actual phenomenon inside the combustion chamber. This study used of 5vol%, 10vol%, and 15vol% blending of palm oil methyl ester with a standard diesel as fuels in diesel engines called as B5, B10, and B15 and standard diesel itself. The injection pressures were varied from 80 MPa to 140 MPa while an ambient temperature of RCM varied from 750 K to 950 K. For all tested fuels, the ignition delay period decreased with the increase in ambient temperature and injection pressure. The initial heat release becomes more delayed for lowering the ambient temperatures and its peak was found to increase progressively and shorten ignition delay period. Increased injection pressures make spray tip penetration longer and promotes a greater amount of fuel-air mixing occurs during ignition delay which is gives early rise of heat release rate. Higher injection rate was promoted both mixing and atomization increase heat release rate as well as shorten ignition delay. The effects of high injection and ambient temperature showed a reduction on emission, especially HC, CO and CO2. Increased in injection pressure, leads to decrease in NOx emission and due to superior air–fuel mixture resulting from increase in injection pressure, CO2, CO and HC emission decreases. Higher blending ratio from B5 to B15 increases the oxygen content, which makes the combustion more complete, thus, promotes the reduction of emissions specifically for CO, CO2, and HC, but the NOx emissions increase. 2020-08 Thesis http://eprints.uthm.edu.my/907/ http://eprints.uthm.edu.my/907/1/24p%20MD%20NORRIZAM%20MOHMAD%20JAAT.pdf text en public http://eprints.uthm.edu.my/907/2/MD%20NORRIZAM%20MOHMAD%20JAAT%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/907/3/MD%20NORRIZAM%20MOHMAD%20JAAT%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Mekanikal dan Pembuatan
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TP315-360 Fuel
spellingShingle	TP315-360 Fuel Mohmad Jaat, Md Norrizam The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
description	The mixture formation prior to the ignition process plays as a key element in the diesel combustion. The objective of this research was to help an understand of the effects of air fuel mixing process during the ignition delay period and initial heat release in combustion process that strongly affects the exhaust emissions. This study investigated effects of ambient temperature,Ti and injection pressure, Pinj on the heat release process during ignition delay periods. Rapid compression machine (RCM) was used to simulate actual phenomenon inside the combustion chamber. This study used of 5vol%, 10vol%, and 15vol% blending of palm oil methyl ester with a standard diesel as fuels in diesel engines called as B5, B10, and B15 and standard diesel itself. The injection pressures were varied from 80 MPa to 140 MPa while an ambient temperature of RCM varied from 750 K to 950 K. For all tested fuels, the ignition delay period decreased with the increase in ambient temperature and injection pressure. The initial heat release becomes more delayed for lowering the ambient temperatures and its peak was found to increase progressively and shorten ignition delay period. Increased injection pressures make spray tip penetration longer and promotes a greater amount of fuel-air mixing occurs during ignition delay which is gives early rise of heat release rate. Higher injection rate was promoted both mixing and atomization increase heat release rate as well as shorten ignition delay. The effects of high injection and ambient temperature showed a reduction on emission, especially HC, CO and CO2. Increased in injection pressure, leads to decrease in NOx emission and due to superior air–fuel mixture resulting from increase in injection pressure, CO2, CO and HC emission decreases. Higher blending ratio from B5 to B15 increases the oxygen content, which makes the combustion more complete, thus, promotes the reduction of emissions specifically for CO, CO2, and HC, but the NOx emissions increase.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohmad Jaat, Md Norrizam
author_facet	Mohmad Jaat, Md Norrizam
author_sort	Mohmad Jaat, Md Norrizam
title	The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
title_short	The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
title_full	The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
title_fullStr	The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
title_full_unstemmed	The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
title_sort	effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Mekanikal dan Pembuatan
publishDate	2020
url	http://eprints.uthm.edu.my/907/1/24p%20MD%20NORRIZAM%20MOHMAD%20JAAT.pdf http://eprints.uthm.edu.my/907/2/MD%20NORRIZAM%20MOHMAD%20JAAT%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/907/3/MD%20NORRIZAM%20MOHMAD%20JAAT%20WATERMARK.pdf
_version_	1747830710868115456

The effect of fuel injection pressure and in cylinder temperature on igniton delay, combustion performance and emission

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