Autoignition in stratified mixtures for pressure gain combustion
| dc.contributor.author | Yücel, Fatma Cansu | |
| dc.contributor.author | Habicht, Fabian | |
| dc.contributor.author | Bohon, Myles D. | |
| dc.contributor.author | Paschereit, Christian Oliver | |
| dc.date.accessioned | 2022-05-17T10:21:06Z | |
| dc.date.available | 2022-05-17T10:21:06Z | |
| dc.date.issued | 2020-10-02 | |
| dc.description.abstract | The 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.sponsorship | DFG, 200291049, SFB 1029: TurbIn - Signifikante Wirkungsgradsteigerung durch gezielte, interagierende Verbrennungs- und Strömungsinstationaritäten in Gasturbinen | en |
| dc.identifier.eissn | 1873-2704 | |
| dc.identifier.issn | 1540-7489 | |
| dc.identifier.uri | https://depositonce.tu-berlin.de/handle/11303/16934 | |
| dc.identifier.uri | http://dx.doi.org/10.14279/depositonce-15713 | |
| dc.language.iso | en | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject.ddc | 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten | de |
| dc.subject.other | homogeneous autoignition | en |
| dc.subject.other | fuel stratification | en |
| dc.subject.other | pressure gain combustion | en |
| dc.subject.other | shockless explosion combustor | en |
| dc.title | Autoignition in stratified mixtures for pressure gain combustion | en |
| dc.type | Article | en |
| dc.type.version | acceptedVersion | en |
| dcterms.bibliographicCitation.doi | 10.1016/j.proci.2020.07.108 | en |
| dcterms.bibliographicCitation.issue | 3 | en |
| dcterms.bibliographicCitation.journaltitle | Proceedings of the Combustion Institute | en |
| dcterms.bibliographicCitation.originalpublishername | Elsevier | en |
| dcterms.bibliographicCitation.originalpublisherplace | Amsterdam | en |
| dcterms.bibliographicCitation.pageend | 3823 | en |
| dcterms.bibliographicCitation.pagestart | 3815 | en |
| dcterms.bibliographicCitation.volume | 38 | en |
| tub.accessrights.dnb | free | en |
| tub.affiliation | Fak. 5 Verkehrs- und Maschinensysteme::Inst. Strömungsmechanik und Technische Akustik (ISTA)::FG Experimentelle Strömungsmechanik | de |
| tub.affiliation.faculty | Fak. 5 Verkehrs- und Maschinensysteme | de |
| tub.affiliation.group | FG Experimentelle Strömungsmechanik | de |
| tub.affiliation.institute | Inst. Strömungsmechanik und Technische Akustik (ISTA) | de |
| tub.publisher.universityorinstitution | Technische Universität Berlin | en |