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

1 Citation (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 Jan 1
Event	6th International Conference on Applied Energy, ICAE 2014 - Taipei, Taiwan, Province of China Duration: 2014 May 30 → 2014 Jun 2

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Keywords

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

ASJC Scopus subject areas

Energy(all)

Cite this

Lim, O., Jamsran, N., & Iida, N. (2014). A computational study of the effects of initial conditions on DME autoignition characteristics. Energy Procedia, 61, 1577-1580. https://doi.org/10.1016/j.egypro.2014.12.175

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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",

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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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Access to Document

10.1016/j.egypro.2014.12.175