A computational study of the effects of initial conditions on DME autoignition characteristics

Ocktaeck Lim; Narankhuu Jamsran; Norimasa Iida

doi:10.1016/j.egypro.2014.12.175

A computational study of the effects of initial conditions on DME autoignition characteristics

Ocktaeck Lim, Narankhuu Jamsran, Norimasa Iida

Department of System Design Engineering

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

This study was computationally investigated how DME autoignition reactivity is affected by EGR and intakepressure boost over various engine speed. CHEMKIN-PRO was used as a solver. Autoignition reactivity was mainly studied using contribution matrix. Investigations concentrate on their effects on variations of autoignition characteristics in-detail including reaction rates of dominant reactions. EGR addition results the increase of the burn duration by lowering reaction rates. Combustion timings were very sensitive to boost pressure which enhances the reactivity of intermediate species but burn durations dominantly rely on the EGR addition. Also, high engine speed under EGR addition increases the burn duration greatly. Finally, substantial reduction of peak PRR by controlling LTHR can be obtained through the combination of EGR and boost pressure over engine speeds at high load operation.

Original language	English
Pages (from-to)	1577-1580
Number of pages	4
Journal	Energy Procedia
Volume	61
DOIs	https://doi.org/10.1016/j.egypro.2014.12.175
Publication status	Published - 2014
Event	6th International Conference on Applied Energy, ICAE 2014 - Taipei, Taiwan, Province of China Duration: 2014 May 30 → 2014 Jun 2

Keywords

Autoignition
Boost
Di-methyl ether
Engine speed
Exhaust gas recirculation
Homogeneous charge compression ignition

ASJC Scopus subject areas

Energy(all)

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title = "A computational study of the effects of initial conditions on DME autoignition characteristics",

abstract = "This study was computationally investigated how DME autoignition reactivity is affected by EGR and intakepressure boost over various engine speed. CHEMKIN-PRO was used as a solver. Autoignition reactivity was mainly studied using contribution matrix. Investigations concentrate on their effects on variations of autoignition characteristics in-detail including reaction rates of dominant reactions. EGR addition results the increase of the burn duration by lowering reaction rates. Combustion timings were very sensitive to boost pressure which enhances the reactivity of intermediate species but burn durations dominantly rely on the EGR addition. Also, high engine speed under EGR addition increases the burn duration greatly. Finally, substantial reduction of peak PRR by controlling LTHR can be obtained through the combination of EGR and boost pressure over engine speeds at high load operation.",

keywords = "Autoignition, Boost, Di-methyl ether, Engine speed, Exhaust gas recirculation, Homogeneous charge compression ignition",

author = "Ocktaeck Lim and Narankhuu Jamsran and Norimasa Iida",

note = "Funding Information: This research was financially supported by the Ministry of Education (MOE) and National Research Foundation of Korea (NRF) through the Human Resource Training Project for Regional Innovation and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2012R1A1A1044855), funded by the Research for commercialization of DME vehicle of Korea Institute of Energy Technology Evaluation and Planning and Top-Class Agency of School of Mechanical Engineering in University of Ulsan. Publisher Copyright: {\textcopyright} 2014 Published by Elsevier Ltd. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.; 6th International Conference on Applied Energy, ICAE 2014 ; Conference date: 30-05-2014 Through 02-06-2014",

year = "2014",

doi = "10.1016/j.egypro.2014.12.175",

language = "English",

volume = "61",

pages = "1577--1580",

journal = "Energy Procedia",

issn = "1876-6102",

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AU - Lim, Ocktaeck

AU - Jamsran, Narankhuu

AU - Iida, Norimasa

N1 - Funding Information: This research was financially supported by the Ministry of Education (MOE) and National Research Foundation of Korea (NRF) through the Human Resource Training Project for Regional Innovation and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2012R1A1A1044855), funded by the Research for commercialization of DME vehicle of Korea Institute of Energy Technology Evaluation and Planning and Top-Class Agency of School of Mechanical Engineering in University of Ulsan. Publisher Copyright: © 2014 Published by Elsevier Ltd. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.

PY - 2014

Y1 - 2014

N2 - This study was computationally investigated how DME autoignition reactivity is affected by EGR and intakepressure boost over various engine speed. CHEMKIN-PRO was used as a solver. Autoignition reactivity was mainly studied using contribution matrix. Investigations concentrate on their effects on variations of autoignition characteristics in-detail including reaction rates of dominant reactions. EGR addition results the increase of the burn duration by lowering reaction rates. Combustion timings were very sensitive to boost pressure which enhances the reactivity of intermediate species but burn durations dominantly rely on the EGR addition. Also, high engine speed under EGR addition increases the burn duration greatly. Finally, substantial reduction of peak PRR by controlling LTHR can be obtained through the combination of EGR and boost pressure over engine speeds at high load operation.

AB - This study was computationally investigated how DME autoignition reactivity is affected by EGR and intakepressure boost over various engine speed. CHEMKIN-PRO was used as a solver. Autoignition reactivity was mainly studied using contribution matrix. Investigations concentrate on their effects on variations of autoignition characteristics in-detail including reaction rates of dominant reactions. EGR addition results the increase of the burn duration by lowering reaction rates. Combustion timings were very sensitive to boost pressure which enhances the reactivity of intermediate species but burn durations dominantly rely on the EGR addition. Also, high engine speed under EGR addition increases the burn duration greatly. Finally, substantial reduction of peak PRR by controlling LTHR can be obtained through the combination of EGR and boost pressure over engine speeds at high load operation.

KW - Autoignition

KW - Boost

KW - Di-methyl ether

KW - Engine speed

KW - Exhaust gas recirculation

KW - Homogeneous charge compression ignition

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JO - Energy Procedia

JF - Energy Procedia

SN - 1876-6102

T2 - 6th International Conference on Applied Energy, ICAE 2014

Y2 - 30 May 2014 through 2 June 2014

ER -

A computational study of the effects of initial conditions on DME autoignition characteristics

Abstract

Keywords

ASJC Scopus subject areas

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