Characterization of Flow Interactions in a One-Stage Shrouded Axial Turbine
The aim of this paper is to characterize the steady and unsteady flow interactions through a one-stage high-pressure (hp) shrouded axial turbine with a tip cavity. The vane and blade passages were reduced based on the scaling technique, and the domains of compromise were identified and used in the f...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/3204859 |
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| _version_ | 1832548901018664960 |
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| author | Adel Ghenaiet |
| author_facet | Adel Ghenaiet |
| author_sort | Adel Ghenaiet |
| collection | DOAJ |
| description | The aim of this paper is to characterize the steady and unsteady flow interactions through a one-stage high-pressure (hp) shrouded axial turbine with a tip cavity. The vane and blade passages were reduced based on the scaling technique, and the domains of compromise were identified and used in the flow computations. The flow structures are mainly in the form of vanes’ wakes and vortices inducing circumferential distortions and interacting with the rotor blades. Fast Fourier transform (FFT) of the static pressure fluctuations recorded at the selected points and lines through the turbine stage revealed high unsteadiness characterized by a space-time periodic behavior, and described by the double Fourier decomposition. The vane-rotor interactions (VRI) appeared in the form of a potential flow field about the blades extending both upstream and downstream and correlated with the rotational speed. The other sources of unsteadiness are induced in the rotor blades by the vanes’ wakes and referred to as the wake interaction, in addition to the secondary flows and vortices in endwall regions. |
| format | Article |
| id | doaj-art-8b1eb0fa4db646cca1a37305eaf75cb1 |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-8b1eb0fa4db646cca1a37305eaf75cb12025-02-03T06:12:47ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742018-01-01201810.1155/2018/32048593204859Characterization of Flow Interactions in a One-Stage Shrouded Axial TurbineAdel Ghenaiet0Laboratory of Energetic Mechanics and Conversion Systems, Faculty of Mechanical Engineering, University of Sciences and Technology Houari Boumediene, BP32 El-Alia, Bab-Ezzouar, 16111 Algiers, AlgeriaThe aim of this paper is to characterize the steady and unsteady flow interactions through a one-stage high-pressure (hp) shrouded axial turbine with a tip cavity. The vane and blade passages were reduced based on the scaling technique, and the domains of compromise were identified and used in the flow computations. The flow structures are mainly in the form of vanes’ wakes and vortices inducing circumferential distortions and interacting with the rotor blades. Fast Fourier transform (FFT) of the static pressure fluctuations recorded at the selected points and lines through the turbine stage revealed high unsteadiness characterized by a space-time periodic behavior, and described by the double Fourier decomposition. The vane-rotor interactions (VRI) appeared in the form of a potential flow field about the blades extending both upstream and downstream and correlated with the rotational speed. The other sources of unsteadiness are induced in the rotor blades by the vanes’ wakes and referred to as the wake interaction, in addition to the secondary flows and vortices in endwall regions.http://dx.doi.org/10.1155/2018/3204859 |
| spellingShingle | Adel Ghenaiet Characterization of Flow Interactions in a One-Stage Shrouded Axial Turbine International Journal of Aerospace Engineering |
| title | Characterization of Flow Interactions in a One-Stage Shrouded Axial Turbine |
| title_full | Characterization of Flow Interactions in a One-Stage Shrouded Axial Turbine |
| title_fullStr | Characterization of Flow Interactions in a One-Stage Shrouded Axial Turbine |
| title_full_unstemmed | Characterization of Flow Interactions in a One-Stage Shrouded Axial Turbine |
| title_short | Characterization of Flow Interactions in a One-Stage Shrouded Axial Turbine |
| title_sort | characterization of flow interactions in a one stage shrouded axial turbine |
| url | http://dx.doi.org/10.1155/2018/3204859 |
| work_keys_str_mv | AT adelghenaiet characterizationofflowinteractionsinaonestageshroudedaxialturbine |