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Proper Orthogonal Decomposition Analysis of Non-Swirling Turbulent Stratified and Premixed Methane/Air Flames

Kamal, M. Mustafa; Duwig, Christophe LU ; Balusamy, Saravanan; Zhou, Ruigang and Hochgreb, Simone (2014) ASME Turbo Expo: Turbine Technical Conference and Exposition In Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition, 2014 4B.
Abstract
This paper reports proper orthogonal decomposition (POD) analyses for the velocity fields measured in a test burner. The Cambridge/Sandia Stratified Swirl Burner has been used in various studies as a benchmark for high resolution scalar and velocity measurements, for comparison with numerical model prediction. Flow field data was collected for a series of bluff-body stabilized premixed and stratified methane/air flames at turbulent, globally lean conditions (phi = 0.75) using high speed stereoscopic particle image velocimetry (HS-SPIV). In this paper, a modal analysis was performed to identify the large scale flow structures and their impact on the flame dynamics. The high speed PIV system was operated at 3 kHz to acquire a series of 4096... (More)
This paper reports proper orthogonal decomposition (POD) analyses for the velocity fields measured in a test burner. The Cambridge/Sandia Stratified Swirl Burner has been used in various studies as a benchmark for high resolution scalar and velocity measurements, for comparison with numerical model prediction. Flow field data was collected for a series of bluff-body stabilized premixed and stratified methane/air flames at turbulent, globally lean conditions (phi = 0.75) using high speed stereoscopic particle image velocimetry (HS-SPIV). In this paper, a modal analysis was performed to identify the large scale flow structures and their impact on the flame dynamics. The high speed PIV system was operated at 3 kHz to acquire a series of 4096 sequential flow field images both for reactive and non-reactive cases, sufficient to follow the large-scale spatial and temporal evolution of flame and flow dynamics. The POD analysis allows identification of vortical structures, created by the bluff body, and in the shear layers surrounding the stabilization point. In addition, the analysis reveals that dominant structures are a strong function of the mixture stratification in the flow field. The dominant energetic modes of reactive and non-reactive flows are very different, as the expansion of gases and the high temperatures alter the unstable modes and their survival in the flow. (Less)
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Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition, 2014
volume
4B
pages
11 pages
publisher
Amer Soc. Mechanical Engineers
conference name
ASME Turbo Expo: Turbine Technical Conference and Exposition
external identifiers
  • WOS:000362059000023
  • Scopus:84961349316
DOI
10.1115/GT2014-26222
language
English
LU publication?
yes
id
e49176fe-6b94-40c2-8c9e-31865792a352 (old id 8227430)
date added to LUP
2015-11-27 12:35:04
date last changed
2016-10-13 04:41:42
@misc{e49176fe-6b94-40c2-8c9e-31865792a352,
  abstract     = {This paper reports proper orthogonal decomposition (POD) analyses for the velocity fields measured in a test burner. The Cambridge/Sandia Stratified Swirl Burner has been used in various studies as a benchmark for high resolution scalar and velocity measurements, for comparison with numerical model prediction. Flow field data was collected for a series of bluff-body stabilized premixed and stratified methane/air flames at turbulent, globally lean conditions (phi = 0.75) using high speed stereoscopic particle image velocimetry (HS-SPIV). In this paper, a modal analysis was performed to identify the large scale flow structures and their impact on the flame dynamics. The high speed PIV system was operated at 3 kHz to acquire a series of 4096 sequential flow field images both for reactive and non-reactive cases, sufficient to follow the large-scale spatial and temporal evolution of flame and flow dynamics. The POD analysis allows identification of vortical structures, created by the bluff body, and in the shear layers surrounding the stabilization point. In addition, the analysis reveals that dominant structures are a strong function of the mixture stratification in the flow field. The dominant energetic modes of reactive and non-reactive flows are very different, as the expansion of gases and the high temperatures alter the unstable modes and their survival in the flow.},
  author       = {Kamal, M. Mustafa and Duwig, Christophe and Balusamy, Saravanan and Zhou, Ruigang and Hochgreb, Simone},
  language     = {eng},
  pages        = {11},
  publisher    = {ARRAY(0xb7250c8)},
  series       = {Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition, 2014},
  title        = {Proper Orthogonal Decomposition Analysis of Non-Swirling Turbulent Stratified and Premixed Methane/Air Flames},
  url          = {http://dx.doi.org/10.1115/GT2014-26222},
  volume       = {4B},
  year         = {2014},
}