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Numerical Investigation of Methane/Hydrogen/Air Partially Premixed Flames in the SGT-800 Burner Fitted to a Combustion Rig

Moëll, Daniel LU ; Lörstad, Daniel LU and Bai, Xue Song LU (2016) In Flow Turbulence and Combustion 96(4). p.987-1003
Abstract

The Siemens SGT-800 3rd generation DLE burner fitted to an atmospheric combustion rig has been numerically investigated. Pure methane and methane enriched by 80 vol% hydrogen flames have been considered. A URANS (Unsteady Reynolds Averaged Navier-Stokes) approach was used in this study along with the k − ω SST and the k − ω SST-SAS models for the turbulence transport. The chemistry is coupled to the turbulent flow simulations by the use of a laminar flamelet library combined with a presumed PDF. The effect of the mesh density in the mixing and the flame region and the effect of the turbulence model and reaction rate model constant are first investigated for the methane/air flame case. The results from the k − ω SST-SAS along... (More)

The Siemens SGT-800 3rd generation DLE burner fitted to an atmospheric combustion rig has been numerically investigated. Pure methane and methane enriched by 80 vol% hydrogen flames have been considered. A URANS (Unsteady Reynolds Averaged Navier-Stokes) approach was used in this study along with the k − ω SST and the k − ω SST-SAS models for the turbulence transport. The chemistry is coupled to the turbulent flow simulations by the use of a laminar flamelet library combined with a presumed PDF. The effect of the mesh density in the mixing and the flame region and the effect of the turbulence model and reaction rate model constant are first investigated for the methane/air flame case. The results from the k − ω SST-SAS along with flamelet libraries are shown to be in excellent agreement with experimental data, whereas the k − ω SST model is too dissipative and cannot capture the unsteady motion of the flame. The k − ω SST-SAS model is used for simulation of the 80 vol% hydrogen enriched flame case without further adjusting the model constants. The global features of the hydrogen enrichment are very well captured in the simulations using the SST-SAS model. With the hydrogen enrichment the time averaged flame front location moves upstream towards the burner exit nozzle. The results are consistent with the experimental observations. The model captures the three dominant low frequency unsteady motion observed in the experiments, indicating that the URANS/LES hybrid model indeed is capable of capturing complex, time dependent, features such as an interaction between a PVC and the flame front.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Flamelets, Gas turbine combustion, Hydrogen enriched flames, Partially premixed, Turbulence model
in
Flow Turbulence and Combustion
volume
96
issue
4
pages
17 pages
publisher
Springer
external identifiers
  • Scopus:84961620953
ISSN
1386-6184
DOI
10.1007/s10494-016-9726-5
language
English
LU publication?
yes
id
1a103ba9-e1cc-43a7-b113-e051cccc7d03
date added to LUP
2016-06-29 11:57:37
date last changed
2016-07-26 14:03:48
@misc{1a103ba9-e1cc-43a7-b113-e051cccc7d03,
  abstract     = {<p>The Siemens SGT-800 3<sup>rd</sup> generation DLE burner fitted to an atmospheric combustion rig has been numerically investigated. Pure methane and methane enriched by 80 vol% hydrogen flames have been considered. A URANS (Unsteady Reynolds Averaged Navier-Stokes) approach was used in this study along with the k − ω SST and the k − ω SST-SAS models for the turbulence transport. The chemistry is coupled to the turbulent flow simulations by the use of a laminar flamelet library combined with a presumed PDF. The effect of the mesh density in the mixing and the flame region and the effect of the turbulence model and reaction rate model constant are first investigated for the methane/air flame case. The results from the k − ω SST-SAS along with flamelet libraries are shown to be in excellent agreement with experimental data, whereas the k − ω SST model is too dissipative and cannot capture the unsteady motion of the flame. The k − ω SST-SAS model is used for simulation of the 80 vol% hydrogen enriched flame case without further adjusting the model constants. The global features of the hydrogen enrichment are very well captured in the simulations using the SST-SAS model. With the hydrogen enrichment the time averaged flame front location moves upstream towards the burner exit nozzle. The results are consistent with the experimental observations. The model captures the three dominant low frequency unsteady motion observed in the experiments, indicating that the URANS/LES hybrid model indeed is capable of capturing complex, time dependent, features such as an interaction between a PVC and the flame front.</p>},
  author       = {Moëll, Daniel and Lörstad, Daniel and Bai, Xue Song},
  issn         = {1386-6184},
  keyword      = {Flamelets,Gas turbine combustion,Hydrogen enriched flames,Partially premixed,Turbulence model},
  language     = {eng},
  month        = {06},
  number       = {4},
  pages        = {987--1003},
  publisher    = {ARRAY(0x8e81258)},
  series       = {Flow Turbulence and Combustion},
  title        = {Numerical Investigation of Methane/Hydrogen/Air Partially Premixed Flames in the SGT-800 Burner Fitted to a Combustion Rig},
  url          = {http://dx.doi.org/10.1007/s10494-016-9726-5},
  volume       = {96},
  year         = {2016},
}