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Hydrogen Addition For Improved Lean Burn Capability of Slow and Fast Burning Natural Gas Combustion Chambers

Tunestål, Per LU ; Christensen, Magnus LU ; Einewall, Patrik LU ; Johansson, Bengt LU and Jönsson, Owe (2002) In SAE Special Publications 2002(1725). p.21-32
Abstract
One way to extend the lean-burn limit of a natural gas engine is by addition of hydrogen to the primary fuel. This paper presents measurements made on a one-cylinder, 1.6- liter natural gas engine. Two combustion chambers, one slow and one fast burning, were tested with various amounts of hydrogen (0, 5, 10 and 15%-vol) added to natural gas. Three operating points were investigated for each combustion chamber and each hydrogen content level; idle, part load (5 bar IMEP) and 13 bar IMEP (simulated turbocharging). Air/fuel ratio was varied between stoichiometric and the lean limit. For each operating point, a range of ignition timings were tested to find maximum brake torque (MBT) and/or knock. Heat-release rate calculations were made in... (More)
One way to extend the lean-burn limit of a natural gas engine is by addition of hydrogen to the primary fuel. This paper presents measurements made on a one-cylinder, 1.6- liter natural gas engine. Two combustion chambers, one slow and one fast burning, were tested with various amounts of hydrogen (0, 5, 10 and 15%-vol) added to natural gas. Three operating points were investigated for each combustion chamber and each hydrogen content level; idle, part load (5 bar IMEP) and 13 bar IMEP (simulated turbocharging). Air/fuel ratio was varied between stoichiometric and the lean limit. For each operating point, a range of ignition timings were tested to find maximum brake torque (MBT) and/or knock. Heat-release rate calculations were made in order to assess the influence of hydrogen addition on burn rate. Addition of hydrogen showed an increase in burn rate for both combustion chambers, resulting in more stable combustion close to the lean limit. This effect was most pronounced for lean operation with the slow combustion 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
Natural Gas, CNG, Hydrogen, Hythane, Spark Ignition, Combustion, Engine
in
SAE Special Publications
volume
2002
issue
1725
pages
21 - 32
publisher
Society of Automotive Engineers
external identifiers
  • scopus:77955300950
ISSN
0099-5908
language
English
LU publication?
yes
id
685c3b40-cf8b-4ff3-8dd3-9fb6c5d64a02 (old id 538225)
alternative location
http://www.ingentaconnect.com/content/docdel/art1024777325
http://www.sae.org/technical/papers/2002-01-2686
date added to LUP
2007-09-25 13:28:26
date last changed
2017-10-01 04:45:56
@inproceedings{685c3b40-cf8b-4ff3-8dd3-9fb6c5d64a02,
  abstract     = {One way to extend the lean-burn limit of a natural gas engine is by addition of hydrogen to the primary fuel. This paper presents measurements made on a one-cylinder, 1.6- liter natural gas engine. Two combustion chambers, one slow and one fast burning, were tested with various amounts of hydrogen (0, 5, 10 and 15%-vol) added to natural gas. Three operating points were investigated for each combustion chamber and each hydrogen content level; idle, part load (5 bar IMEP) and 13 bar IMEP (simulated turbocharging). Air/fuel ratio was varied between stoichiometric and the lean limit. For each operating point, a range of ignition timings were tested to find maximum brake torque (MBT) and/or knock. Heat-release rate calculations were made in order to assess the influence of hydrogen addition on burn rate. Addition of hydrogen showed an increase in burn rate for both combustion chambers, resulting in more stable combustion close to the lean limit. This effect was most pronounced for lean operation with the slow combustion chamber.},
  author       = {Tunestål, Per and Christensen, Magnus and Einewall, Patrik and Johansson, Bengt and Jönsson, Owe},
  booktitle    = {SAE Special Publications},
  issn         = {0099-5908},
  keyword      = {Natural Gas,CNG,Hydrogen,Hythane,Spark Ignition,Combustion,Engine},
  language     = {eng},
  number       = {1725},
  pages        = {21--32},
  publisher    = {Society of Automotive Engineers},
  title        = {Hydrogen Addition For Improved Lean Burn Capability of Slow and Fast Burning Natural Gas Combustion Chambers},
  volume       = {2002},
  year         = {2002},
}