Advanced

CFD Simulations of Pre-Chamber Jets' Mixing Characteristics in a Heavy Duty Natural Gas Engine

Shah, Ashish LU ; Tunestål, Per LU and Johansson, Bengt LU (2015) JSAE/SAE Powertrain, Fuels and Lubricants International Meeting, 2015 In [Host publication title missing]
Abstract
The effect of pre-chamber volume and nozzle diameter on performance of pre-chamber ignition device in a heavy duty natural gas engine has previously been studied by the authors. From the analysis of recorded pre- and main chamber pressure traces, it was observed that a pre-chamber with a larger volume reduced flame development angle and combustion duration while at a given pre-chamber volume, smaller nozzle diameters provided better ignition in the main chamber. The structure of pre-chamber jet and its mixing characteristics with the main chamber charge are believed to play a vital role, and hence CFD simulations are performed to study the fluid dynamic aspects of interaction between the pre-chamber jet and main chamber charge during the... (More)
The effect of pre-chamber volume and nozzle diameter on performance of pre-chamber ignition device in a heavy duty natural gas engine has previously been studied by the authors. From the analysis of recorded pre- and main chamber pressure traces, it was observed that a pre-chamber with a larger volume reduced flame development angle and combustion duration while at a given pre-chamber volume, smaller nozzle diameters provided better ignition in the main chamber. The structure of pre-chamber jet and its mixing characteristics with the main chamber charge are believed to play a vital role, and hence CFD simulations are performed to study the fluid dynamic aspects of interaction between the pre-chamber jet and main chamber charge during the period of flame development angle, i.e. before main chamber ignition. It has been observed that jets from a larger pre-chamber penetrates through the main chamber faster due to higher momentum and generates turbulence in the main chamber earlier. At a given pre-chamber volume, smaller nozzle diameter causes higher velocity jet also causing high turbulence built up and better distribution of active species from the pre-chamber into the main chamber. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Internal combustion engines, ignition system, pre-chamber ignition, CFD simulation
in
[Host publication title missing]
pages
9 pages
publisher
Society of Automotive Engineers
conference name
JSAE/SAE Powertrain, Fuels and Lubricants International Meeting, 2015
DOI
10.4271/2015-01-1890
language
English
LU publication?
yes
id
50a9cffe-4388-4c3c-8cc2-4544e8a4bcd5 (old id 8228184)
date added to LUP
2015-11-19 15:37:45
date last changed
2016-04-16 09:07:26
@misc{50a9cffe-4388-4c3c-8cc2-4544e8a4bcd5,
  abstract     = {The effect of pre-chamber volume and nozzle diameter on performance of pre-chamber ignition device in a heavy duty natural gas engine has previously been studied by the authors. From the analysis of recorded pre- and main chamber pressure traces, it was observed that a pre-chamber with a larger volume reduced flame development angle and combustion duration while at a given pre-chamber volume, smaller nozzle diameters provided better ignition in the main chamber. The structure of pre-chamber jet and its mixing characteristics with the main chamber charge are believed to play a vital role, and hence CFD simulations are performed to study the fluid dynamic aspects of interaction between the pre-chamber jet and main chamber charge during the period of flame development angle, i.e. before main chamber ignition. It has been observed that jets from a larger pre-chamber penetrates through the main chamber faster due to higher momentum and generates turbulence in the main chamber earlier. At a given pre-chamber volume, smaller nozzle diameter causes higher velocity jet also causing high turbulence built up and better distribution of active species from the pre-chamber into the main chamber.},
  author       = {Shah, Ashish and Tunestål, Per and Johansson, Bengt},
  keyword      = {Internal combustion engines,ignition system,pre-chamber ignition,CFD simulation},
  language     = {eng},
  pages        = {9},
  publisher    = {ARRAY(0xaa890f8)},
  series       = {[Host publication title missing]},
  title        = {CFD Simulations of Pre-Chamber Jets' Mixing Characteristics in a Heavy Duty Natural Gas Engine},
  url          = {http://dx.doi.org/10.4271/2015-01-1890},
  year         = {2015},
}