Kinetic study of combustion behavior in a gas turbine - Influence from varying natural gas composition
(2006)Department of Energy Sciences
- Abstract
- The purpose of the numerical study was to investigate the influence of
three different natural gas compositions on the combustion behaviour of
an Advanced Environmental Vortex (AEV) burner. The flow conditions
apply to the AEV burners installed in the Siemens gas turbine SGT-800.
Numerical simulations were carried out using the software Chemkin
4. Ignition temperatures, adiabatic flame temperatures, NOX emissions
and laminar flame speeds were determined using models included in the
software.
To find suitable reaction mechanisms for the simulations a mechanism
study was made. The behaviour of the mechanisms was studied burning
methane and ethane. The two reaction mechanisms chosen for the simulations represent combustion of... (More) - The purpose of the numerical study was to investigate the influence of
three different natural gas compositions on the combustion behaviour of
an Advanced Environmental Vortex (AEV) burner. The flow conditions
apply to the AEV burners installed in the Siemens gas turbine SGT-800.
Numerical simulations were carried out using the software Chemkin
4. Ignition temperatures, adiabatic flame temperatures, NOX emissions
and laminar flame speeds were determined using models included in the
software.
To find suitable reaction mechanisms for the simulations a mechanism
study was made. The behaviour of the mechanisms was studied burning
methane and ethane. The two reaction mechanisms chosen for the simulations represent combustion of hydrocarbons with up to two carbon atoms
and seven carbon atoms. The reaction mechanisms are developed by Danmarks tekniske universitet and Lawrence Livermore National Laboratory
respectively.
The simulations gave the following results. The ignition temperature
differed up to 80 K and the adiabatic flame temperature up to 30 K
between the gases. The highest NOX emissions were obtained at =0.95
and increased with the residence time. The largest difference in laminar
flame speed was 10 cm/s.
The conclusion from the results when applied to the conditions in the
AEV burner is that the difference in gas composition does not influence the
performance of the burner noticeably. However some differences in NOX
emissions are noticed but since NOX emissions are difficult to predict the
levels of the emissions are to be treated with caution. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/1327403
- author
- Tillmark, Catharina
- supervisor
- organization
- year
- 2006
- type
- H1 - Master's Degree (One Year)
- subject
- keywords
- natural gas, combustion, gas turbines, naturgas, förbränning, gasturbiner, Energy research, Energiforskning
- language
- English
- id
- 1327403
- date added to LUP
- 2006-07-05 00:00:00
- date last changed
- 2006-07-05 00:00:00
@misc{1327403,
abstract = {{The purpose of the numerical study was to investigate the influence of
three different natural gas compositions on the combustion behaviour of
an Advanced Environmental Vortex (AEV) burner. The flow conditions
apply to the AEV burners installed in the Siemens gas turbine SGT-800.
Numerical simulations were carried out using the software Chemkin
4. Ignition temperatures, adiabatic flame temperatures, NOX emissions
and laminar flame speeds were determined using models included in the
software.
To find suitable reaction mechanisms for the simulations a mechanism
study was made. The behaviour of the mechanisms was studied burning
methane and ethane. The two reaction mechanisms chosen for the simulations represent combustion of hydrocarbons with up to two carbon atoms
and seven carbon atoms. The reaction mechanisms are developed by Danmarks tekniske universitet and Lawrence Livermore National Laboratory
respectively.
The simulations gave the following results. The ignition temperature
differed up to 80 K and the adiabatic flame temperature up to 30 K
between the gases. The highest NOX emissions were obtained at =0.95
and increased with the residence time. The largest difference in laminar
flame speed was 10 cm/s.
The conclusion from the results when applied to the conditions in the
AEV burner is that the difference in gas composition does not influence the
performance of the burner noticeably. However some differences in NOX
emissions are noticed but since NOX emissions are difficult to predict the
levels of the emissions are to be treated with caution.}},
author = {{Tillmark, Catharina}},
language = {{eng}},
note = {{Student Paper}},
title = {{Kinetic study of combustion behavior in a gas turbine - Influence from varying natural gas composition}},
year = {{2006}},
}