contributor author | P. Griebel | |
contributor author | E. Boschek | |
contributor author | P. Jansohn | |
date accessioned | 2017-05-09T00:23:43Z | |
date available | 2017-05-09T00:23:43Z | |
date copyright | April, 2007 | |
date issued | 2007 | |
identifier issn | 1528-8919 | |
identifier other | JETPEZ-26949#404_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/135737 | |
description abstract | Flame stability is a crucial issue in low NOx combustion systems operating at extremely lean conditions. Hydrogen enrichment seems to be a promising option to extend lean blowout limits (LBO) of natural gas combustion. This experimental study addresses flame stability enhancement and NOx reduction in turbulent, high-pressure, lean premixed methane/air flames in a generic combustor capable of a wide range of operating conditions. Lean blowout limits and NOx emissions are presented for pressures up to 14bar, bulk velocities in the range of 32–80m∕s, two different preheating temperatures (673K, 773K), and a range of fuel mixtures from pure methane to 20% H2∕80%CH4 by volume. The influence of turbulence on LBO limits is also discussed. In addition to the investigation of perfectly premixed H2-enriched flames, LBO and NOx are also discussed for hydrogen piloting. Experiments have revealed that a mixture of 20% hydrogen and 80% methane, by volume, can typically extend the lean blowout limit by ∼10% compared to pure methane. The flame temperature at LBO is ∼60K lower resulting in the reduction of NOx concentration by ≈35%(0.5→0.3ppm∕15%O2). | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Lean Blowout Limits and NOx Emissions of Turbulent, Lean Premixed, Hydrogen-Enriched Methane/Air Flames at High Pressure | |
type | Journal Paper | |
journal volume | 129 | |
journal issue | 2 | |
journal title | Journal of Engineering for Gas Turbines and Power | |
identifier doi | 10.1115/1.2436568 | |
journal fristpage | 404 | |
journal lastpage | 410 | |
identifier eissn | 0742-4795 | |
keywords | Temperature | |
keywords | Turbulence | |
keywords | Flames | |
keywords | Hydrogen | |
keywords | Methane | |
keywords | Emissions | |
keywords | Mixtures | |
keywords | Fuels | |
keywords | High pressure (Physics) AND Combustion chambers | |
tree | Journal of Engineering for Gas Turbines and Power:;2007:;volume( 129 ):;issue: 002 | |
contenttype | Fulltext | |