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.
1/06/12 → 31/05/16
Project: Research project
Development of optical techniques for flow testing in turbomachinery
Schennach, O., Göttlich, E. & Woisetschläger, J.
1/01/04 → 31/12/05
Project: Research project
Optical Metrology and Optical Diagnostics for Flow and Vibration Analysis
Neger, T., Lang, H., Brenn, G., Woisetschläger, J., Mayrhofer, N., Hipp, M., Göttlich, E. & Hampel, B.
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 cavityof 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 cavityof 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 cavityof 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