Discussion of laser interferometric vibrometry for the determination of heat release fluctuations in an unconfined swirl-stabilized flame

Felix Greiffenhagen, Johannes Peterleithner, Jakob Woisetschläger, Andreas Fischer, Johannes Gürtler, Jürgen Czarske

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

Fluctuations in heat release, hot and cold spots convected by the flow and sound waves are all related to density fluctuations, a number easily detected by interferometry. Same as chemiluminescence, interferometry is a line-of-sight method and therefore needs optical access and tomographic reconstruction of density fields. In this work we discuss the use of Laser Interferometric Vibrometry (LIV) as an alternative or extension to chemiluminescence when detecting heat release fluctuations in the flame, convection of hot and cold spots in the non-reacting flow field and sound waves emitted from a 3.4 kW turbulent, unconfined swirl-stabilized methane/air flame under perfectly premixed conditions. For this discussion local temperatures, local ratios of heat release and local Gladstone-Dale constants are determined and their influence on the result discussed. Global and local fluctuations in heat release rate recorded by LIV and chemiluminescence are compared, resulting in the same global values if local temperature fields and local equivalence ratios are used for LIV data evaluation. In contrast, local fluctuations in OH* chemiluminescence emission are influenced by turbulence and strain in this type of flame.

Originalspracheenglisch
Seiten (von - bis)315-327
Seitenumfang13
FachzeitschriftCombustion and flame
Jahrgang201
DOIs
PublikationsstatusVeröffentlicht - 2019

Fingerprint

Chemiluminescence
chemiluminescence
flames
heat
Lasers
Interferometry
lasers
sound waves
Acoustic waves
interferometry
Methane
Flow fields
Temperature distribution
Turbulence
line of sight
equivalence
flow distribution
temperature distribution
convection
methane

Schlagwörter

    ASJC Scopus subject areas

    • !!Energy Engineering and Power Technology
    • !!Physics and Astronomy(all)
    • !!Chemical Engineering(all)
    • !!Chemistry(all)
    • !!Fuel Technology

    Dies zitieren

    Discussion of laser interferometric vibrometry for the determination of heat release fluctuations in an unconfined swirl-stabilized flame. / Greiffenhagen, Felix; Peterleithner, Johannes; Woisetschläger, Jakob; Fischer, Andreas; Gürtler, Johannes; Czarske, Jürgen.

    in: Combustion and flame, Jahrgang 201, 2019, S. 315-327.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

    @article{bda117b717a44b79b5c3486a74dfe4ce,
    title = "Discussion of laser interferometric vibrometry for the determination of heat release fluctuations in an unconfined swirl-stabilized flame",
    abstract = "Fluctuations in heat release, hot and cold spots convected by the flow and sound waves are all related to density fluctuations, a number easily detected by interferometry. Same as chemiluminescence, interferometry is a line-of-sight method and therefore needs optical access and tomographic reconstruction of density fields. In this work we discuss the use of Laser Interferometric Vibrometry (LIV) as an alternative or extension to chemiluminescence when detecting heat release fluctuations in the flame, convection of hot and cold spots in the non-reacting flow field and sound waves emitted from a 3.4 kW turbulent, unconfined swirl-stabilized methane/air flame under perfectly premixed conditions. For this discussion local temperatures, local ratios of heat release and local Gladstone-Dale constants are determined and their influence on the result discussed. Global and local fluctuations in heat release rate recorded by LIV and chemiluminescence are compared, resulting in the same global values if local temperature fields and local equivalence ratios are used for LIV data evaluation. In contrast, local fluctuations in OH* chemiluminescence emission are influenced by turbulence and strain in this type of flame.",
    keywords = "Chemiluminescence, Heat release fluctuations, Laser interferometric vibrometry, Optical diagnostics, Swirl-stabilized flames, Uncertainty analysis",
    author = "Felix Greiffenhagen and Johannes Peterleithner and Jakob Woisetschl{\"a}ger and Andreas Fischer and Johannes G{\"u}rtler and J{\"u}rgen Czarske",
    year = "2019",
    doi = "10.1016/j.combustflame.2018.12.019",
    language = "English",
    volume = "201",
    pages = "315--327",
    journal = "Combustion and flame",
    issn = "0010-2180",
    publisher = "Elsevier Inc.",

    }

    TY - JOUR

    T1 - Discussion of laser interferometric vibrometry for the determination of heat release fluctuations in an unconfined swirl-stabilized flame

    AU - Greiffenhagen, Felix

    AU - Peterleithner, Johannes

    AU - Woisetschläger, Jakob

    AU - Fischer, Andreas

    AU - Gürtler, Johannes

    AU - Czarske, Jürgen

    PY - 2019

    Y1 - 2019

    N2 - Fluctuations in heat release, hot and cold spots convected by the flow and sound waves are all related to density fluctuations, a number easily detected by interferometry. Same as chemiluminescence, interferometry is a line-of-sight method and therefore needs optical access and tomographic reconstruction of density fields. In this work we discuss the use of Laser Interferometric Vibrometry (LIV) as an alternative or extension to chemiluminescence when detecting heat release fluctuations in the flame, convection of hot and cold spots in the non-reacting flow field and sound waves emitted from a 3.4 kW turbulent, unconfined swirl-stabilized methane/air flame under perfectly premixed conditions. For this discussion local temperatures, local ratios of heat release and local Gladstone-Dale constants are determined and their influence on the result discussed. Global and local fluctuations in heat release rate recorded by LIV and chemiluminescence are compared, resulting in the same global values if local temperature fields and local equivalence ratios are used for LIV data evaluation. In contrast, local fluctuations in OH* chemiluminescence emission are influenced by turbulence and strain in this type of flame.

    AB - Fluctuations in heat release, hot and cold spots convected by the flow and sound waves are all related to density fluctuations, a number easily detected by interferometry. Same as chemiluminescence, interferometry is a line-of-sight method and therefore needs optical access and tomographic reconstruction of density fields. In this work we discuss the use of Laser Interferometric Vibrometry (LIV) as an alternative or extension to chemiluminescence when detecting heat release fluctuations in the flame, convection of hot and cold spots in the non-reacting flow field and sound waves emitted from a 3.4 kW turbulent, unconfined swirl-stabilized methane/air flame under perfectly premixed conditions. For this discussion local temperatures, local ratios of heat release and local Gladstone-Dale constants are determined and their influence on the result discussed. Global and local fluctuations in heat release rate recorded by LIV and chemiluminescence are compared, resulting in the same global values if local temperature fields and local equivalence ratios are used for LIV data evaluation. In contrast, local fluctuations in OH* chemiluminescence emission are influenced by turbulence and strain in this type of flame.

    KW - Chemiluminescence

    KW - Heat release fluctuations

    KW - Laser interferometric vibrometry

    KW - Optical diagnostics

    KW - Swirl-stabilized flames

    KW - Uncertainty analysis

    UR - http://www.scopus.com/inward/record.url?scp=85059801942&partnerID=8YFLogxK

    U2 - 10.1016/j.combustflame.2018.12.019

    DO - 10.1016/j.combustflame.2018.12.019

    M3 - Article

    VL - 201

    SP - 315

    EP - 327

    JO - Combustion and flame

    JF - Combustion and flame

    SN - 0010-2180

    ER -