Effect of Heat Release Pattern of Flame during Propagation on Auto-Ignition Process of End-Gas

Katsuya Matsuura, Keito Nakano, Keisuke Shimizu, Norimasa Iida, Yoshihisa Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Knock is a factor hindering enhancement of the thermal efficiency of spark ignition engines, and is an unsteady phenomenon that does not necessarily occur each cycle. In addition, the heat release history of the flame also fluctuates from cycle to cycle, and the auto-ignition process of the unburned mixture (end-gas), compressed by the global increase in pressure due to release of chemical energy, is affected by this fluctuation. Regarding auto-ignition of the end-gas, which can be the origin of knock, this study focused on the fluctuation of the flame heat release pattern, and used a zero-dimensional (0D) detailed chemical reaction calculation in an attempt to analyze and examine the consequence on the end-gas compression and auto-ignition process of changes in the i) start of combustion, ii) combustion duration and iii) center of heat release of the flame. The results showed that the compression speed of the end-gas varies according to the heat release pattern of the flame, and the ignition delay is affected by the compression speed. Furthermore, when the compression speed is slow, the temperature at which the end-gas starts heat release decreases and the combustion-phase advance limit deteriorates. In addition, enhancement of the combustion speed of the flame (shortening the combustion duration) was confirmed to enable completion of combustion before the end-gas auto-ignites, and also to shorten the end-gas compression time, shift the heat release start temperature to the high-temperature side, and improve the knock limit. Analysis was also performed on the impact of varying the flame heat release pattern for different initial pressures and air-fuel mixture equivalence ratios. It was found that there exists an optimum heat release pattern for avoiding knock effectively and obtaining increased engine power.

Original languageEnglish
Title of host publicationSAE Technical Papers
PublisherSAE International
Volume2016-April
DOIs
Publication statusPublished - 2016
EventSAE 2016 World Congress and Exhibition - Detroit, United States
Duration: 2016 Apr 122016 Apr 14

Other

OtherSAE 2016 World Congress and Exhibition
CountryUnited States
CityDetroit
Period16/4/1216/4/14

Fingerprint

Ignition
Gases
Combustion knock
Compaction
Hot Temperature
Internal combustion engines
Temperature
Chemical reactions
Engines
Air

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering

Cite this

Matsuura, K., Nakano, K., Shimizu, K., Iida, N., & Sato, Y. (2016). Effect of Heat Release Pattern of Flame during Propagation on Auto-Ignition Process of End-Gas. In SAE Technical Papers (Vol. 2016-April). SAE International. https://doi.org/10.4271/2016-01-0701

Effect of Heat Release Pattern of Flame during Propagation on Auto-Ignition Process of End-Gas. / Matsuura, Katsuya; Nakano, Keito; Shimizu, Keisuke; Iida, Norimasa; Sato, Yoshihisa.

SAE Technical Papers. Vol. 2016-April SAE International, 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Matsuura, K, Nakano, K, Shimizu, K, Iida, N & Sato, Y 2016, Effect of Heat Release Pattern of Flame during Propagation on Auto-Ignition Process of End-Gas. in SAE Technical Papers. vol. 2016-April, SAE International, SAE 2016 World Congress and Exhibition, Detroit, United States, 16/4/12. https://doi.org/10.4271/2016-01-0701
Matsuura K, Nakano K, Shimizu K, Iida N, Sato Y. Effect of Heat Release Pattern of Flame during Propagation on Auto-Ignition Process of End-Gas. In SAE Technical Papers. Vol. 2016-April. SAE International. 2016 https://doi.org/10.4271/2016-01-0701
Matsuura, Katsuya ; Nakano, Keito ; Shimizu, Keisuke ; Iida, Norimasa ; Sato, Yoshihisa. / Effect of Heat Release Pattern of Flame during Propagation on Auto-Ignition Process of End-Gas. SAE Technical Papers. Vol. 2016-April SAE International, 2016.
@inproceedings{4409847e2e7945bbba72f4d0a0359a87,
title = "Effect of Heat Release Pattern of Flame during Propagation on Auto-Ignition Process of End-Gas",
abstract = "Knock is a factor hindering enhancement of the thermal efficiency of spark ignition engines, and is an unsteady phenomenon that does not necessarily occur each cycle. In addition, the heat release history of the flame also fluctuates from cycle to cycle, and the auto-ignition process of the unburned mixture (end-gas), compressed by the global increase in pressure due to release of chemical energy, is affected by this fluctuation. Regarding auto-ignition of the end-gas, which can be the origin of knock, this study focused on the fluctuation of the flame heat release pattern, and used a zero-dimensional (0D) detailed chemical reaction calculation in an attempt to analyze and examine the consequence on the end-gas compression and auto-ignition process of changes in the i) start of combustion, ii) combustion duration and iii) center of heat release of the flame. The results showed that the compression speed of the end-gas varies according to the heat release pattern of the flame, and the ignition delay is affected by the compression speed. Furthermore, when the compression speed is slow, the temperature at which the end-gas starts heat release decreases and the combustion-phase advance limit deteriorates. In addition, enhancement of the combustion speed of the flame (shortening the combustion duration) was confirmed to enable completion of combustion before the end-gas auto-ignites, and also to shorten the end-gas compression time, shift the heat release start temperature to the high-temperature side, and improve the knock limit. Analysis was also performed on the impact of varying the flame heat release pattern for different initial pressures and air-fuel mixture equivalence ratios. It was found that there exists an optimum heat release pattern for avoiding knock effectively and obtaining increased engine power.",
author = "Katsuya Matsuura and Keito Nakano and Keisuke Shimizu and Norimasa Iida and Yoshihisa Sato",
year = "2016",
doi = "10.4271/2016-01-0701",
language = "English",
volume = "2016-April",
booktitle = "SAE Technical Papers",
publisher = "SAE International",

}

TY - GEN

T1 - Effect of Heat Release Pattern of Flame during Propagation on Auto-Ignition Process of End-Gas

AU - Matsuura, Katsuya

AU - Nakano, Keito

AU - Shimizu, Keisuke

AU - Iida, Norimasa

AU - Sato, Yoshihisa

PY - 2016

Y1 - 2016

N2 - Knock is a factor hindering enhancement of the thermal efficiency of spark ignition engines, and is an unsteady phenomenon that does not necessarily occur each cycle. In addition, the heat release history of the flame also fluctuates from cycle to cycle, and the auto-ignition process of the unburned mixture (end-gas), compressed by the global increase in pressure due to release of chemical energy, is affected by this fluctuation. Regarding auto-ignition of the end-gas, which can be the origin of knock, this study focused on the fluctuation of the flame heat release pattern, and used a zero-dimensional (0D) detailed chemical reaction calculation in an attempt to analyze and examine the consequence on the end-gas compression and auto-ignition process of changes in the i) start of combustion, ii) combustion duration and iii) center of heat release of the flame. The results showed that the compression speed of the end-gas varies according to the heat release pattern of the flame, and the ignition delay is affected by the compression speed. Furthermore, when the compression speed is slow, the temperature at which the end-gas starts heat release decreases and the combustion-phase advance limit deteriorates. In addition, enhancement of the combustion speed of the flame (shortening the combustion duration) was confirmed to enable completion of combustion before the end-gas auto-ignites, and also to shorten the end-gas compression time, shift the heat release start temperature to the high-temperature side, and improve the knock limit. Analysis was also performed on the impact of varying the flame heat release pattern for different initial pressures and air-fuel mixture equivalence ratios. It was found that there exists an optimum heat release pattern for avoiding knock effectively and obtaining increased engine power.

AB - Knock is a factor hindering enhancement of the thermal efficiency of spark ignition engines, and is an unsteady phenomenon that does not necessarily occur each cycle. In addition, the heat release history of the flame also fluctuates from cycle to cycle, and the auto-ignition process of the unburned mixture (end-gas), compressed by the global increase in pressure due to release of chemical energy, is affected by this fluctuation. Regarding auto-ignition of the end-gas, which can be the origin of knock, this study focused on the fluctuation of the flame heat release pattern, and used a zero-dimensional (0D) detailed chemical reaction calculation in an attempt to analyze and examine the consequence on the end-gas compression and auto-ignition process of changes in the i) start of combustion, ii) combustion duration and iii) center of heat release of the flame. The results showed that the compression speed of the end-gas varies according to the heat release pattern of the flame, and the ignition delay is affected by the compression speed. Furthermore, when the compression speed is slow, the temperature at which the end-gas starts heat release decreases and the combustion-phase advance limit deteriorates. In addition, enhancement of the combustion speed of the flame (shortening the combustion duration) was confirmed to enable completion of combustion before the end-gas auto-ignites, and also to shorten the end-gas compression time, shift the heat release start temperature to the high-temperature side, and improve the knock limit. Analysis was also performed on the impact of varying the flame heat release pattern for different initial pressures and air-fuel mixture equivalence ratios. It was found that there exists an optimum heat release pattern for avoiding knock effectively and obtaining increased engine power.

UR - http://www.scopus.com/inward/record.url?scp=84979294011&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84979294011&partnerID=8YFLogxK

U2 - 10.4271/2016-01-0701

DO - 10.4271/2016-01-0701

M3 - Conference contribution

VL - 2016-April

BT - SAE Technical Papers

PB - SAE International

ER -