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

2002-01-2686

10/21/2002

Event
SAE Powertrain & Fluid Systems Conference & Exhibition
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/2002-01-2686
Pages
13
Citation
Tunestål, P., Christensen, M., Einewall, P., Andersson, T. et al., "Hydrogen Addition For Improved Lean Burn Capability of Slow and Fast Burning Natural Gas Combustion Chambers," SAE Technical Paper 2002-01-2686, 2002, https://doi.org/10.4271/2002-01-2686.
Additional Details
Publisher
Published
Oct 21, 2002
Product Code
2002-01-2686
Content Type
Technical Paper
Language
English