Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve

An experimental study was conducted to investigate the effect of the structure of the induction flow on the characteristics of early flames in a lean-stratified and lean-homogeneous charge combustion of compressed natural gas (CNG) fuel in a direct injection (Di) engine at different engine speeds. T...

Full description

Main Authors: Abd Aziz, A.R., Anbese, Y.T., Hagos, F.Y., Heikal, M.R., Firmansyah,
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.19749 /
Published: MDPI AG 2017
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85025177940&doi=10.3390%2fen10070964&partnerID=40&md5=8afb9e4c563e803b412dcdeb7d00cff1
http://eprints.utp.edu.my/19749/
Tags: Add Tag
No Tags, Be the first to tag this record!
id utp-eprints.19749
recordtype eprints
spelling utp-eprints.197492018-04-20T07:36:59Z Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve Abd Aziz, A.R. Anbese, Y.T. Hagos, F.Y. Heikal, M.R. Firmansyah, An experimental study was conducted to investigate the effect of the structure of the induction flow on the characteristics of early flames in a lean-stratified and lean-homogeneous charge combustion of compressed natural gas (CNG) fuel in a direct injection (Di) engine at different engine speeds. The engine speed was varied at 1500 rpm, 1800 rpm and 2100 rpm, and the ignition timing was set at a 38.5 crank angle (CA) after top dead center (TDC) for all conditions. The engine was operated in a partial-load mode and a homogeneous air/fuel charge was achieved by injecting the fuel early (before the intake valve closure), while late injection during the compression stroke was used to produce a stratified charge. Different induction flow structures were obtained by adjusting the swirl control valves (SCV). Using an endoscopic intensified CCD (ICCD) camera, flame images were captured and analyzed. Code was developed to analyze the level of distortion of the flame and its wrinkledness, displacement and position relative to the spark center, as well as the flame growth rate. The results showed a higher flame growth rate with the flame kernel in the homogeneous charge, compared to the stratified combustion case. In the stratified charge combustion scenario, the 10 SCV closure (medium-tumble) resulted in a higher early flame growth rate, whereas a homogeneous charge combustion (characterized by strong swirl) resulted in the highest rate of flame growth. © 2017 by the authors. MDPI AG 2017 Article PeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85025177940&doi=10.3390%2fen10070964&partnerID=40&md5=8afb9e4c563e803b412dcdeb7d00cff1 Abd Aziz, A.R. and Anbese, Y.T. and Hagos, F.Y. and Heikal, M.R. and Firmansyah, (2017) Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve. Energies, 10 (7). http://eprints.utp.edu.my/19749/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description An experimental study was conducted to investigate the effect of the structure of the induction flow on the characteristics of early flames in a lean-stratified and lean-homogeneous charge combustion of compressed natural gas (CNG) fuel in a direct injection (Di) engine at different engine speeds. The engine speed was varied at 1500 rpm, 1800 rpm and 2100 rpm, and the ignition timing was set at a 38.5 crank angle (CA) after top dead center (TDC) for all conditions. The engine was operated in a partial-load mode and a homogeneous air/fuel charge was achieved by injecting the fuel early (before the intake valve closure), while late injection during the compression stroke was used to produce a stratified charge. Different induction flow structures were obtained by adjusting the swirl control valves (SCV). Using an endoscopic intensified CCD (ICCD) camera, flame images were captured and analyzed. Code was developed to analyze the level of distortion of the flame and its wrinkledness, displacement and position relative to the spark center, as well as the flame growth rate. The results showed a higher flame growth rate with the flame kernel in the homogeneous charge, compared to the stratified combustion case. In the stratified charge combustion scenario, the 10 SCV closure (medium-tumble) resulted in a higher early flame growth rate, whereas a homogeneous charge combustion (characterized by strong swirl) resulted in the highest rate of flame growth. © 2017 by the authors.
format Article
author Abd Aziz, A.R.
Anbese, Y.T.
Hagos, F.Y.
Heikal, M.R.
Firmansyah,
spellingShingle Abd Aziz, A.R.
Anbese, Y.T.
Hagos, F.Y.
Heikal, M.R.
Firmansyah,
Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve
author_sort Abd Aziz, A.R.
title Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve
title_short Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve
title_full Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve
title_fullStr Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve
title_full_unstemmed Characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve
title_sort characteristics of early flame development in a direct-injection spark-ignition cng engine fitted with a variable swirl control valve
publisher MDPI AG
publishDate 2017
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85025177940&doi=10.3390%2fen10070964&partnerID=40&md5=8afb9e4c563e803b412dcdeb7d00cff1
http://eprints.utp.edu.my/19749/
_version_ 1741196256943800320
score 11.62408

Similar Items