Time-Averaged and Time-Accurate Aerodynamic Effects of Forward Rotor Cavity Purge Flow for a High-Pressure Turbine--Part I: Analytical and Experimental Comparisons.
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| Title: | Time-Averaged and Time-Accurate Aerodynamic Effects of Forward Rotor Cavity Purge Flow for a High-Pressure Turbine--Part I: Analytical and Experimental Comparisons. |
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| Authors: | Green, Brian R.1 brian.green@ge.com, Mathison, Randall M.2 mathison.4@osu.edu, Dunn, Michael G.2 dunn.129@osu.edu |
| Source: | Journal of Turbomachinery. Jan2014, Vol. 136 Issue 1, p1-13. 13p. |
| Subjects: | Wind turbine design & construction, Unsteady flow (Aerodynamics), High pressure (Technology), Rotors, Aerofoils, Comparative studies, Navier-Stokes equations, Computational fluid dynamics |
| Abstract: | The effect of rotor purge flow on the unsteady aerodynamics of a high-pressure turbine stage operating at design corrected conditions has been investigated, both experimentally and computationally. The experimental configuration consisted of a single-stage high-pressure turbine with a modern film-cooling configuration on the vane airfoil and the inner and outer end wall surfaces. Purge flow was introduced into the cavity located between the high-pressure vane and the high-pressure disk. The high-pressure blades and the downstream low-pressure turbine nozzle row were not cooled. All of the hard-ware featured an aerodynamic design typical of a commercial high-pressure ratio turbine and the flow path geometry was representative of the actual engine hardware. In addition to instrumentation in the main flow path, the stationary and rotating seals of the purge flow cavity were instrumented with high frequency response flush-mounted pressure transducers and miniature thermocouples in order to measure the flow field parameters above and below the angel wing. Predictions of the time-dependent flow field in the turbine flow path were obtained using FINE/Turbo, a three-dimensional Reynolds-averaged Navier-Stokes computational fluid dynamics CFD code that had the capability to perform both a steady and unsteady analy-sis. The steady and unsteady flow fields throughout the turbine were predicted using a three blade-row computational model that incorporated the purge flow cavity between the high-pressure vane and disk. The predictions were peiformed in an effort to mimic the design process with no adjustment of boundary conditions to better match the experi-mental data. The time-accurate predictions were generated using the harmonic method. Part I of this paper concentrates on the comparison of the time-averaged and time-accurate predictions with measurements in and around the purge flow cavity. The degree of agreement between the measured and predicted parameters is described in detail, pro-viding confidence in the predictions for the flow field analysis that will be provided in Partii. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Turbomachinery is the property of American Society of Mechanical Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 93290858 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Time-Averaged and Time-Accurate Aerodynamic Effects of Forward Rotor Cavity Purge Flow for a High-Pressure Turbine--Part I: Analytical and Experimental Comparisons. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Green%2C+Brian+R%2E%22">Green, Brian R.</searchLink><relatesTo>1</relatesTo><i> brian.green@ge.com</i><br /><searchLink fieldCode="AR" term="%22Mathison%2C+Randall+M%2E%22">Mathison, Randall M.</searchLink><relatesTo>2</relatesTo><i> mathison.4@osu.edu</i><br /><searchLink fieldCode="AR" term="%22Dunn%2C+Michael+G%2E%22">Dunn, Michael G.</searchLink><relatesTo>2</relatesTo><i> dunn.129@osu.edu</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Turbomachinery%22">Journal of Turbomachinery</searchLink>. Jan2014, Vol. 136 Issue 1, p1-13. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Wind+turbine+design+%26+construction%22">Wind turbine design & construction</searchLink><br /><searchLink fieldCode="DE" term="%22Unsteady+flow+%28Aerodynamics%29%22">Unsteady flow (Aerodynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22High+pressure+%28Technology%29%22">High pressure (Technology)</searchLink><br /><searchLink fieldCode="DE" term="%22Rotors%22">Rotors</searchLink><br /><searchLink fieldCode="DE" term="%22Aerofoils%22">Aerofoils</searchLink><br /><searchLink fieldCode="DE" term="%22Comparative+studies%22">Comparative studies</searchLink><br /><searchLink fieldCode="DE" term="%22Navier-Stokes+equations%22">Navier-Stokes equations</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The effect of rotor purge flow on the unsteady aerodynamics of a high-pressure turbine stage operating at design corrected conditions has been investigated, both experimentally and computationally. The experimental configuration consisted of a single-stage high-pressure turbine with a modern film-cooling configuration on the vane airfoil and the inner and outer end wall surfaces. Purge flow was introduced into the cavity located between the high-pressure vane and the high-pressure disk. The high-pressure blades and the downstream low-pressure turbine nozzle row were not cooled. All of the hard-ware featured an aerodynamic design typical of a commercial high-pressure ratio turbine and the flow path geometry was representative of the actual engine hardware. In addition to instrumentation in the main flow path, the stationary and rotating seals of the purge flow cavity were instrumented with high frequency response flush-mounted pressure transducers and miniature thermocouples in order to measure the flow field parameters above and below the angel wing. Predictions of the time-dependent flow field in the turbine flow path were obtained using FINE/Turbo, a three-dimensional Reynolds-averaged Navier-Stokes computational fluid dynamics CFD code that had the capability to perform both a steady and unsteady analy-sis. The steady and unsteady flow fields throughout the turbine were predicted using a three blade-row computational model that incorporated the purge flow cavity between the high-pressure vane and disk. The predictions were peiformed in an effort to mimic the design process with no adjustment of boundary conditions to better match the experi-mental data. The time-accurate predictions were generated using the harmonic method. Part I of this paper concentrates on the comparison of the time-averaged and time-accurate predictions with measurements in and around the purge flow cavity. The degree of agreement between the measured and predicted parameters is described in detail, pro-viding confidence in the predictions for the flow field analysis that will be provided in Partii. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Turbomachinery is the property of American Society of Mechanical Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1115/1.4024774 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1 Subjects: – SubjectFull: Wind turbine design & construction Type: general – SubjectFull: Unsteady flow (Aerodynamics) Type: general – SubjectFull: High pressure (Technology) Type: general – SubjectFull: Rotors Type: general – SubjectFull: Aerofoils Type: general – SubjectFull: Comparative studies Type: general – SubjectFull: Navier-Stokes equations Type: general – SubjectFull: Computational fluid dynamics Type: general Titles: – TitleFull: Time-Averaged and Time-Accurate Aerodynamic Effects of Forward Rotor Cavity Purge Flow for a High-Pressure Turbine--Part I: Analytical and Experimental Comparisons. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Green, Brian R. – PersonEntity: Name: NameFull: Mathison, Randall M. – PersonEntity: Name: NameFull: Dunn, Michael G. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 0889504X Numbering: – Type: volume Value: 136 – Type: issue Value: 1 Titles: – TitleFull: Journal of Turbomachinery Type: main |
| ResultId | 1 |
