Frequency resolved interferometric detection of local density fluctuations in flames

Johannes Peterleithner; Florian Salcher; Jakob Woisetschläger

Frequency resolved interferometric detection of local density fluctuations in flames

Johannes Peterleithner
, Florian Salcher
, Jakob Woisetschläger^*

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Abstract

Low NOx strategies usually include lean combustion in order to reduce the flame temperature. Under certain conditions, this interaction can occur periodically as thermo-acoustic coupling, a reason why new premix combustion systems tend to have oscillations. Ongoing developments have pushed the sensitivity for density fluctuation measurements using laser vibrometers. In this experiment a variable geometry burner was enclosed in a liner, with the flame optically accessible through four fused silica windows. By this burner with adjustable flame conditions the cavity
of the atmospheric model combustion chamber was excitable at a frequency around 200Hz. Resonant and non-resonant flame conditions were investigated and compared by laser vibrometer interferometry, schlieren visualization and OH*/CH* chemiluminescence

Original language	English
Title of host publication	Proceedings 17th International Symposium on Application of Laser Techniques to Fluid Mechanics
Pages	04.7_1_53-04.7_1_53
Number of pages	18
Publication status	Published - 2014
Event	17th International Symposium on Application of Laser Techniques to Fluid Mechanics - Lisboa, Portugal Duration: 7 Jul 2014 → 10 Jul 2014

Conference

Conference	17th International Symposium on Application of Laser Techniques to Fluid Mechanics
Country/Territory	Portugal
City	Lisboa
Period	7/07/14 → 10/07/14

Fields of Expertise

Mobility & Production
Sustainable Systems

Treatment code (Nähere Zuordnung)

Basic - Fundamental (Grundlagenforschung)
Application
Experimental

Access to Document

2014_LisboaAccepted author manuscript, 1.96 MB

FWF - Thermoac. Oscillations - Interferometric Detection of Thermoacoustic Oscillations in Flames
Woisetschläger, J. (Project manager)
1/06/12 → 31/05/16
Project: Research project
Development of optical techniques for flow testing in turbomachinery
Schennach, O. (Other function), Göttlich, E. (Other function) & Woisetschläger, J. (Project manager)
1/01/04 → 31/12/05
Project: Research project
Optical Metrology and Optical Diagnostics for Flow and Vibration Analysis
Neger, T. (Attendee), Lang, H. (Other function), Göttlich, E. (Other function), Hipp, M. (Other function), Brenn, G. (Attendee), Hampel, B. (Other function), Mayrhofer, N. (Other function) & Woisetschläger, J. (Project manager)
1/01/95 → 31/01/22
Project: Research area

Cite this

Frequency resolved interferometric detection of local density fluctuations in flames. / Peterleithner, Johannes; Salcher, Florian; Woisetschläger, Jakob.
Proceedings 17th International Symposium on Application of Laser Techniques to Fluid Mechanics. 2014. p. 04.7_1_53-04.7_1_53.

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

Peterleithner, J, Salcher, F & Woisetschläger, J 2014, Frequency resolved interferometric detection of local density fluctuations in flames. in Proceedings 17th International Symposium on Application of Laser Techniques to Fluid Mechanics. pp. 04.7_1_53-04.7_1_53, 17th International Symposium on Application of Laser Techniques to Fluid Mechanics, Lisboa, Portugal, 7/07/14.

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title = "Frequency resolved interferometric detection of local density fluctuations in flames",

abstract = "Low NOx strategies usually include lean combustion in order to reduce the flame temperature. Under certain conditions, this interaction can occur periodically as thermo-acoustic coupling, a reason why new premix combustion systems tend to have oscillations. Ongoing developments have pushed the sensitivity for density fluctuation measurements using laser vibrometers. In this experiment a variable geometry burner was enclosed in a liner, with the flame optically accessible through four fused silica windows. By this burner with adjustable flame conditions the cavity of the atmospheric model combustion chamber was excitable at a frequency around 200Hz. Resonant and non-resonant flame conditions were investigated and compared by laser vibrometer interferometry, schlieren visualization and OH*/CH* chemiluminescence",

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AU - Peterleithner, Johannes

AU - Salcher, Florian

AU - Woisetschläger, Jakob

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N2 - Low NOx strategies usually include lean combustion in order to reduce the flame temperature. Under certain conditions, this interaction can occur periodically as thermo-acoustic coupling, a reason why new premix combustion systems tend to have oscillations. Ongoing developments have pushed the sensitivity for density fluctuation measurements using laser vibrometers. In this experiment a variable geometry burner was enclosed in a liner, with the flame optically accessible through four fused silica windows. By this burner with adjustable flame conditions the cavity of the atmospheric model combustion chamber was excitable at a frequency around 200Hz. Resonant and non-resonant flame conditions were investigated and compared by laser vibrometer interferometry, schlieren visualization and OH*/CH* chemiluminescence

AB - Low NOx strategies usually include lean combustion in order to reduce the flame temperature. Under certain conditions, this interaction can occur periodically as thermo-acoustic coupling, a reason why new premix combustion systems tend to have oscillations. Ongoing developments have pushed the sensitivity for density fluctuation measurements using laser vibrometers. In this experiment a variable geometry burner was enclosed in a liner, with the flame optically accessible through four fused silica windows. By this burner with adjustable flame conditions the cavity of the atmospheric model combustion chamber was excitable at a frequency around 200Hz. Resonant and non-resonant flame conditions were investigated and compared by laser vibrometer interferometry, schlieren visualization and OH*/CH* chemiluminescence

KW - Thermoakustik

M3 - Conference paper

SP - 04.7_1_53-04.7_1_53

BT - Proceedings 17th International Symposium on Application of Laser Techniques to Fluid Mechanics

T2 - 17th International Symposium on Application of Laser Techniques to Fluid Mechanics

Y2 - 7 July 2014 through 10 July 2014

ER -

Frequency resolved interferometric detection of local density fluctuations in flames

Abstract

Conference

Fields of Expertise

Treatment code (Nähere Zuordnung)

Access to Document

Fingerprint

Projects

FWF - Thermoac. Oscillations - Interferometric Detection of Thermoacoustic Oscillations in Flames

Development of optical techniques for flow testing in turbomachinery

Optical Metrology and Optical Diagnostics for Flow and Vibration Analysis

Cite this