Combustion process of homogeneous charge compression ignition engine using numerical modeling

A zero dimensional thermodynamic numerical model is developed to simulate the combustion characteristics and performance of a four stroke gasoline engine using homogeneous compression combustion ignition (HCCI) method. This model which applies the first law of thermodynamics for a closed system is i...

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Main Author:	Md Zain @ Abdul Rahman, Najihah
Format:	Thesis
Language:	English
Published:	2014
Subjects:	Internal combustion engines Internal combustion engines - Design and construction
Online Access:	http://psasir.upm.edu.my/id/eprint/60092/1/FK%202014%2070IR.pdf
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id	my-upm-ir.60092
record_format	uketd_dc
spelling	my-upm-ir.600922018-04-16T06:55:55Z Combustion process of homogeneous charge compression ignition engine using numerical modeling 2014-03 Md Zain @ Abdul Rahman, Najihah A zero dimensional thermodynamic numerical model is developed to simulate the combustion characteristics and performance of a four stroke gasoline engine using homogeneous compression combustion ignition (HCCI) method. This model which applies the first law of thermodynamics for a closed system is inclusive of empirical model for predicting the important parameters for engine cycles: the combustion timing and mass burnt fraction during the combustion process. The hypothesis is the increasing intake temperature can reduce the combustion duration and the fuel consumption at wide range of equivalence ratio, resulting in decreasing peak pressure and friction losses, and hence, increasing the engine efficiency. The intake temperature were increased from 373-433 K with increment of 20 K. The engine was operated over a range of equivalence ratios of 0.2 to 0.5 at constant engine speed of 1200 rpm and intake pressure of 89,950 K Pa. Simulations were performed using Simulink® under different engine operating conditions. The model was successfully developed to predict the combustion characteristics and performance. Validations show good agreements between the experimental data and simulation results. Increasing intake temperature allows reducing the combustion duration by 0.99 °CA and 0.26 °CA at equivalence ratios of 0.2 and 0.5, respectively, followed by decreasing the heat released to the wall about 22.79%. The brake power reduces up to 3.56% at any equivalence ratios. However, the brake specific fuel consumption decreases about 6.09%-5.76% at 0.2-0.5 of equivalence ratios, respectively. Increasing intake temperature does not increase the power output. However, it is able to improve the efficiency at richer mixture as the fuel consumption and brake specific fuel consumption also can be decreased. Internal combustion engines Internal combustion engines - Design and construction 2014-03 Thesis http://psasir.upm.edu.my/id/eprint/60092/ http://psasir.upm.edu.my/id/eprint/60092/1/FK%202014%2070IR.pdf text en public masters Universiti Putra Malaysia Internal combustion engines Internal combustion engines - Design and construction
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
topic	Internal combustion engines Internal combustion engines - Design and construction
spellingShingle	Internal combustion engines Internal combustion engines - Design and construction Md Zain @ Abdul Rahman, Najihah Combustion process of homogeneous charge compression ignition engine using numerical modeling
description	A zero dimensional thermodynamic numerical model is developed to simulate the combustion characteristics and performance of a four stroke gasoline engine using homogeneous compression combustion ignition (HCCI) method. This model which applies the first law of thermodynamics for a closed system is inclusive of empirical model for predicting the important parameters for engine cycles: the combustion timing and mass burnt fraction during the combustion process. The hypothesis is the increasing intake temperature can reduce the combustion duration and the fuel consumption at wide range of equivalence ratio, resulting in decreasing peak pressure and friction losses, and hence, increasing the engine efficiency. The intake temperature were increased from 373-433 K with increment of 20 K. The engine was operated over a range of equivalence ratios of 0.2 to 0.5 at constant engine speed of 1200 rpm and intake pressure of 89,950 K Pa. Simulations were performed using Simulink® under different engine operating conditions. The model was successfully developed to predict the combustion characteristics and performance. Validations show good agreements between the experimental data and simulation results. Increasing intake temperature allows reducing the combustion duration by 0.99 °CA and 0.26 °CA at equivalence ratios of 0.2 and 0.5, respectively, followed by decreasing the heat released to the wall about 22.79%. The brake power reduces up to 3.56% at any equivalence ratios. However, the brake specific fuel consumption decreases about 6.09%-5.76% at 0.2-0.5 of equivalence ratios, respectively. Increasing intake temperature does not increase the power output. However, it is able to improve the efficiency at richer mixture as the fuel consumption and brake specific fuel consumption also can be decreased.
format	Thesis
qualification_level	Master's degree
author	Md Zain @ Abdul Rahman, Najihah
author_facet	Md Zain @ Abdul Rahman, Najihah
author_sort	Md Zain @ Abdul Rahman, Najihah
title	Combustion process of homogeneous charge compression ignition engine using numerical modeling
title_short	Combustion process of homogeneous charge compression ignition engine using numerical modeling
title_full	Combustion process of homogeneous charge compression ignition engine using numerical modeling
title_fullStr	Combustion process of homogeneous charge compression ignition engine using numerical modeling
title_full_unstemmed	Combustion process of homogeneous charge compression ignition engine using numerical modeling
title_sort	combustion process of homogeneous charge compression ignition engine using numerical modeling
granting_institution	Universiti Putra Malaysia
publishDate	2014
url	http://psasir.upm.edu.my/id/eprint/60092/1/FK%202014%2070IR.pdf
_version_	1747812258382086144

Combustion process of homogeneous charge compression ignition engine using numerical modeling

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