Advanced

Computational and experimental investigation of emissions in a highly humidified premixed flame

Hermann, Fredrik LU ; Klingmann, Jens LU and Gabrielsson, Rolf LU (2003) 2003 ASME Turbo Expo In American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI 1. p.819-827
Abstract
Emission formation and flame stability were investigated, both experimentally and computationally, for premixed combustion with varying amounts of water vapor in the mixture. Emission measurements were made in a gas turbine combustor at atmospheric conditions, using Danish Natural Gas (NG) as fuel. The emissions were mapped as a function of humidity, inlet air temperature, equivalence ratio and aerodynamic load. Operating conditions were chosen to match what can be expected from e.g. an EvGT cycle for power generation. The inlet air temperature was slightly lower than the inlet temperatures that would be found in a recuperated cycle. The degree of humidity was varied from 0w% to 33w% of the airflow in the experiment, while the air inlet... (More)
Emission formation and flame stability were investigated, both experimentally and computationally, for premixed combustion with varying amounts of water vapor in the mixture. Emission measurements were made in a gas turbine combustor at atmospheric conditions, using Danish Natural Gas (NG) as fuel. The emissions were mapped as a function of humidity, inlet air temperature, equivalence ratio and aerodynamic load. Operating conditions were chosen to match what can be expected from e.g. an EvGT cycle for power generation. The inlet air temperature was slightly lower than the inlet temperatures that would be found in a recuperated cycle. The degree of humidity was varied from 0w% to 33w% of the airflow in the experiment, while the air inlet temperature was varied from 500K to 800K. Computations were made using a single Perfectly Stirred Reactor (PSR) model and a reaction scheme with 821 reactions and 69 species. It was found that the NO<sub>X</sub> emissions were strongly reduced by the addition of water. Most of this decrease vanishes in practical combustion since richer combustion is required to keep CO emissions (combustion efficiency) at a tolerable level. The maximum humidity was found to be dependent on inlet air temperature and aerodynamic load. In this experiment, the maximum humidity achieved was 33%. (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
Combustion efficiency, Premixed flame, Perfectly stirred reactor (PSR)
in
American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI
volume
1
pages
819 - 827
publisher
American Society Of Mechanical Engineers (ASME)
conference name
2003 ASME Turbo Expo
external identifiers
  • Scopus:0347578111
language
English
LU publication?
yes
id
76f0ed82-c2d6-42a4-9048-94033540d1a0 (old id 613282)
date added to LUP
2007-11-28 15:06:37
date last changed
2017-01-01 08:06:47
@inproceedings{76f0ed82-c2d6-42a4-9048-94033540d1a0,
  abstract     = {Emission formation and flame stability were investigated, both experimentally and computationally, for premixed combustion with varying amounts of water vapor in the mixture. Emission measurements were made in a gas turbine combustor at atmospheric conditions, using Danish Natural Gas (NG) as fuel. The emissions were mapped as a function of humidity, inlet air temperature, equivalence ratio and aerodynamic load. Operating conditions were chosen to match what can be expected from e.g. an EvGT cycle for power generation. The inlet air temperature was slightly lower than the inlet temperatures that would be found in a recuperated cycle. The degree of humidity was varied from 0w% to 33w% of the airflow in the experiment, while the air inlet temperature was varied from 500K to 800K. Computations were made using a single Perfectly Stirred Reactor (PSR) model and a reaction scheme with 821 reactions and 69 species. It was found that the NO&lt;sub&gt;X&lt;/sub&gt; emissions were strongly reduced by the addition of water. Most of this decrease vanishes in practical combustion since richer combustion is required to keep CO emissions (combustion efficiency) at a tolerable level. The maximum humidity was found to be dependent on inlet air temperature and aerodynamic load. In this experiment, the maximum humidity achieved was 33%.},
  author       = {Hermann, Fredrik and Klingmann, Jens and Gabrielsson, Rolf},
  booktitle    = {American Society of Mechanical Engineers, International Gas Turbine Institute, Turbo Expo (Publication) IGTI},
  keyword      = {Combustion efficiency,Premixed flame,Perfectly stirred reactor (PSR)},
  language     = {eng},
  pages        = {819--827},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {Computational and experimental investigation of emissions in a highly humidified premixed flame},
  volume       = {1},
  year         = {2003},
}