Dissertation/Thesis
Unsteady Flow Structures within a Turbine Rim Seal Cavity in the Presence of Purge Flow—An Experimental and Computational Unsteady Aerodynamics Investigation
| Τίτλος: | Unsteady Flow Structures within a Turbine Rim Seal Cavity in the Presence of Purge Flow—An Experimental and Computational Unsteady Aerodynamics Investigation |
|---|---|
| Συγγραφείς: | Cengiz Camci, Michael Averbach, Jason Town |
| Πηγή: | Aerospace ; Volume 6 ; Issue 5 ; Pages: 60 |
| Στοιχεία εκδότη: | Multidisciplinary Digital Publishing Institute |
| Έτος έκδοσης: | 2019 |
| Συλλογή: | MDPI Open Access Publishing |
| Θεματικοί όροι: | axial turbines, rim seal cavity, purge flow, ingress, egress, unsteady flow structures, turbine experiments, URANS calculations |
| Περιγραφή: | Flow within the space between the rotor and stator of a turbine disk, and an area referred to as the rim seal cavity, develops azimuthal velocity component from the rotor disk. The fluid within develops unsteady structures that move at a fraction of the rotor speed. A test is designed to measure the number of unsteady structures and the rotational speed at which they are moving in the rim seal cavity of an experimental research rig. Data manipulation was developed to extract the speed, and the numbers of structures present using two fast-response aerodynamic probes measuring static pressure on the surface of the nozzle guide vane (NGV)-side rim seal cavity. A computational study is done to compare measured results to a transient unsteady Reynolds-averaged Navier–Stokes (URANS). The computational simulation consists of eight vanes and ten blades, carefully picked to reduce the error caused by blade vane pitch mismatch and to allow for the structures to develop correctly, and the rim seal cavity to measure the speed and number of the structures. The experimental results found 15 structures moving at 77.5% of the rotor speed, and the computational study suggested 14.5 structures are moving at 81.7% rotor speed. The agreement represents the first known test of its kind in a large-scale turbine test rig and the first known “good” agreement between computational and experimental work. |
| Τύπος εγγράφου: | Thesis |
| Περιγραφή αρχείου: | application/pdf |
| Γλώσσα: | English |
| Relation: | https://dx.doi.org/10.3390/aerospace6050060 |
| DOI: | 10.3390/aerospace6050060 |
| Διαθεσιμότητα: | https://doi.org/10.3390/aerospace6050060 |
| Rights: | https://creativecommons.org/licenses/by/4.0/ |
| Αριθμός Καταχώρησης: | edsbas.8801362C |
| Βάση Δεδομένων: | BASE |
| FullText | Text: Availability: 0 CustomLinks: – Url: https://doi.org/10.3390/aerospace6050060# Name: EDS - BASE (ns324271) Category: fullText Text: View record from BASE |
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| Header | DbId: edsbas DbLabel: BASE An: edsbas.8801362C RelevancyScore: 805 AccessLevel: 3 PubType: Dissertation/Thesis PubTypeId: unknown PreciseRelevancyScore: 805.215454101563 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Unsteady Flow Structures within a Turbine Rim Seal Cavity in the Presence of Purge Flow—An Experimental and Computational Unsteady Aerodynamics Investigation – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Cengiz+Camci%22">Cengiz Camci</searchLink><br /><searchLink fieldCode="AR" term="%22Michael+Averbach%22">Michael Averbach</searchLink><br /><searchLink fieldCode="AR" term="%22Jason+Town%22">Jason Town</searchLink> – Name: TitleSource Label: Source Group: Src Data: Aerospace ; Volume 6 ; Issue 5 ; Pages: 60 – Name: Publisher Label: Publisher Information Group: PubInfo Data: Multidisciplinary Digital Publishing Institute – Name: DatePubCY Label: Publication Year Group: Date Data: 2019 – Name: Subset Label: Collection Group: HoldingsInfo Data: MDPI Open Access Publishing – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22axial+turbines%22">axial turbines</searchLink><br /><searchLink fieldCode="DE" term="%22rim+seal+cavity%22">rim seal cavity</searchLink><br /><searchLink fieldCode="DE" term="%22purge+flow%22">purge flow</searchLink><br /><searchLink fieldCode="DE" term="%22ingress%22">ingress</searchLink><br /><searchLink fieldCode="DE" term="%22egress%22">egress</searchLink><br /><searchLink fieldCode="DE" term="%22unsteady+flow+structures%22">unsteady flow structures</searchLink><br /><searchLink fieldCode="DE" term="%22turbine+experiments%22">turbine experiments</searchLink><br /><searchLink fieldCode="DE" term="%22URANS+calculations%22">URANS calculations</searchLink> – Name: Abstract Label: Description Group: Ab Data: Flow within the space between the rotor and stator of a turbine disk, and an area referred to as the rim seal cavity, develops azimuthal velocity component from the rotor disk. The fluid within develops unsteady structures that move at a fraction of the rotor speed. A test is designed to measure the number of unsteady structures and the rotational speed at which they are moving in the rim seal cavity of an experimental research rig. Data manipulation was developed to extract the speed, and the numbers of structures present using two fast-response aerodynamic probes measuring static pressure on the surface of the nozzle guide vane (NGV)-side rim seal cavity. A computational study is done to compare measured results to a transient unsteady Reynolds-averaged Navier–Stokes (URANS). The computational simulation consists of eight vanes and ten blades, carefully picked to reduce the error caused by blade vane pitch mismatch and to allow for the structures to develop correctly, and the rim seal cavity to measure the speed and number of the structures. The experimental results found 15 structures moving at 77.5% of the rotor speed, and the computational study suggested 14.5 structures are moving at 81.7% rotor speed. The agreement represents the first known test of its kind in a large-scale turbine test rig and the first known “good” agreement between computational and experimental work. – Name: TypeDocument Label: Document Type Group: TypDoc Data: Thesis – Name: Format Label: File Description Group: SrcInfo Data: application/pdf – Name: Language Label: Language Group: Lang Data: English – Name: NoteTitleSource Label: Relation Group: SrcInfo Data: https://dx.doi.org/10.3390/aerospace6050060 – Name: DOI Label: DOI Group: ID Data: 10.3390/aerospace6050060 – Name: URL Label: Availability Group: URL Data: https://doi.org/10.3390/aerospace6050060 – Name: Copyright Label: Rights Group: Cpyrght Data: https://creativecommons.org/licenses/by/4.0/ – Name: AN Label: Accession Number Group: ID Data: edsbas.8801362C |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsbas&AN=edsbas.8801362C |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/aerospace6050060 Languages: – Text: English Subjects: – SubjectFull: axial turbines Type: general – SubjectFull: rim seal cavity Type: general – SubjectFull: purge flow Type: general – SubjectFull: ingress Type: general – SubjectFull: egress Type: general – SubjectFull: unsteady flow structures Type: general – SubjectFull: turbine experiments Type: general – SubjectFull: URANS calculations Type: general Titles: – TitleFull: Unsteady Flow Structures within a Turbine Rim Seal Cavity in the Presence of Purge Flow—An Experimental and Computational Unsteady Aerodynamics Investigation Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Cengiz Camci – PersonEntity: Name: NameFull: Michael Averbach – PersonEntity: Name: NameFull: Jason Town IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Type: published Y: 2019 Identifiers: – Type: issn-locals Value: edsbas – Type: issn-locals Value: edsbas.oa Titles: – TitleFull: Aerospace ; Volume 6 ; Issue 5 ; Pages: 60 Type: main |
| ResultId | 1 |