Autoignition in stratified mixtures for pressure gain combustion

dc.contributor.authorYücel, Fatma Cansu
dc.contributor.authorHabicht, Fabian
dc.contributor.authorBohon, Myles D.
dc.contributor.authorPaschereit, Christian Oliver
dc.date.accessioned2022-05-17T10:21:06Z
dc.date.available2022-05-17T10:21:06Z
dc.date.issued2020-10-02
dc.description.abstractThe reliable generation of quasi-homogeneous autoignition inside a combustor fed by a continuous air flow would represent a milestone in realizing pressure gain combustion in gas turbines. In this work, the ignition distribution inside a stratified fuel–air mixture is analyzed. The ability of precise and reproducible injection of a desired fuel profile inside a convecting air flow is verified by applying tunable diode laser absorption spectroscopy in non-reacting measurements. High-speed, static pressure sensors and ionization probes allow for simultaneous detection of the flame and pressure rise at several axial positions in reactive measurements with dimethyl ether as fuel. A second, exchangeable combustion tube enables optical observation of OH* intensity in combination with pressure measurements. Experiments with three arbitrary fuel profiles show a set of ignition distributions that vary in shape, homogeneity, and the number of simultaneous autoignition events. Although the measurements show notable variation, a significant and reproducible influence of the fuel injection on the ignition distribution is observed. Results show that uniform autoignition leads to a coupling of the reaction front with the pressure rise and, therefore, induces a greater aerodynamic constraint than non-uniform ignition distributions, which are dominated by propagating deflagration fronts.en
dc.description.sponsorshipDFG, 200291049, SFB 1029: TurbIn - Signifikante Wirkungsgradsteigerung durch gezielte, interagierende Verbrennungs- und Strömungsinstationaritäten in Gasturbinenen
dc.identifier.eissn1873-2704
dc.identifier.issn1540-7489
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16934
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15713
dc.language.isoenen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.otherhomogeneous autoignitionen
dc.subject.otherfuel stratificationen
dc.subject.otherpressure gain combustionen
dc.subject.othershockless explosion combustoren
dc.titleAutoignition in stratified mixtures for pressure gain combustionen
dc.typeArticleen
dc.type.versionacceptedVersionen
dcterms.bibliographicCitation.doi10.1016/j.proci.2020.07.108en
dcterms.bibliographicCitation.issue3en
dcterms.bibliographicCitation.journaltitleProceedings of the Combustion Instituteen
dcterms.bibliographicCitation.originalpublishernameElsevieren
dcterms.bibliographicCitation.originalpublisherplaceAmsterdamen
dcterms.bibliographicCitation.pageend3823en
dcterms.bibliographicCitation.pagestart3815en
dcterms.bibliographicCitation.volume38en
tub.accessrights.dnbfreeen
tub.affiliationFak. 5 Verkehrs- und Maschinensysteme>Inst. Strömungsmechanik und Technische Akustik (ISTA)>FG Experimentelle Strömungsmechanikde
tub.affiliation.facultyFak. 5 Verkehrs- und Maschinensystemede
tub.affiliation.groupFG Experimentelle Strömungsmechanikde
tub.affiliation.instituteInst. Strömungsmechanik und Technische Akustik (ISTA)de
tub.publisher.universityorinstitutionTechnische Universität Berlinen
Files
Original bundle
Now showing 1 - 1 of 1
Loading…
Thumbnail Image
Name:
Yücel_etal_Autoignition_2020.pdf
Size:
1.23 MB
Format:
Adobe Portable Document Format
Description:
Collections