Methods for Controlling Gas Turbine Casing Flows During Engine Shutdown
During the shutdown of a gas turbine, natural convection flows occur inside of the engine casing. These natural convection flows cause the top of the engine casing to cool more slowly than the bottom of the casing. This non-uniform cooling can cause the casing to distort, known as “cat-bac...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-06-01
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| Series: | International Journal of Turbomachinery, Propulsion and Power |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2504-186X/3/2/17 |
| _version_ | 1818480236108447744 |
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| author | Andrew Pilkington Budimir Rosic Shigenari Horie |
| author_facet | Andrew Pilkington Budimir Rosic Shigenari Horie |
| author_sort | Andrew Pilkington |
| collection | DOAJ |
| description | During the shutdown of a gas turbine, natural convection flows occur inside of the engine casing. These natural convection flows cause the top of the engine casing to cool more slowly than the bottom of the casing. This non-uniform cooling can cause the casing to distort, known as “cat-back” distortion. This distortion leads to reduced tip and seal clearances, which can cause rubbing and binding. In this study, two different methods for reducing the non-uniform casing heat transfer in an industrial gas turbine during shutdown were investigated. A baseline case with no active method for reducing the casing heat transfer was compared with purge and flow extraction methods. It was found that the new proposed extraction method improved the uniformity of the casing heat transfer during the initial shutdown period. |
| first_indexed | 2024-12-10T11:20:44Z |
| format | Article |
| id | doaj.art-2bcfbbd7ec504c47a940552dfdf1fae3 |
| institution | Directory Open Access Journal |
| issn | 2504-186X |
| language | English |
| last_indexed | 2024-12-10T11:20:44Z |
| publishDate | 2018-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Turbomachinery, Propulsion and Power |
| spelling | doaj.art-2bcfbbd7ec504c47a940552dfdf1fae32022-12-22T01:50:56ZengMDPI AGInternational Journal of Turbomachinery, Propulsion and Power2504-186X2018-06-01321710.3390/ijtpp3020017ijtpp3020017Methods for Controlling Gas Turbine Casing Flows During Engine ShutdownAndrew Pilkington0Budimir Rosic1Shigenari Horie2Osney Thermo-Fluids Laboratory, University of Oxford, Oxford OX2 0ES, UKOsney Thermo-Fluids Laboratory, University of Oxford, Oxford OX2 0ES, UKResearch & Innovation Center, Mitsubishi Heavy Industries, Ltd., 2-1-1 Shinhama, Arai-Cho, Takasago 676-8686, JapanDuring the shutdown of a gas turbine, natural convection flows occur inside of the engine casing. These natural convection flows cause the top of the engine casing to cool more slowly than the bottom of the casing. This non-uniform cooling can cause the casing to distort, known as “cat-back” distortion. This distortion leads to reduced tip and seal clearances, which can cause rubbing and binding. In this study, two different methods for reducing the non-uniform casing heat transfer in an industrial gas turbine during shutdown were investigated. A baseline case with no active method for reducing the casing heat transfer was compared with purge and flow extraction methods. It was found that the new proposed extraction method improved the uniformity of the casing heat transfer during the initial shutdown period.http://www.mdpi.com/2504-186X/3/2/17natural convectiongas turbineshutdowncasing distortion |
| spellingShingle | Andrew Pilkington Budimir Rosic Shigenari Horie Methods for Controlling Gas Turbine Casing Flows During Engine Shutdown International Journal of Turbomachinery, Propulsion and Power natural convection gas turbine shutdown casing distortion |
| title | Methods for Controlling Gas Turbine Casing Flows During Engine Shutdown |
| title_full | Methods for Controlling Gas Turbine Casing Flows During Engine Shutdown |
| title_fullStr | Methods for Controlling Gas Turbine Casing Flows During Engine Shutdown |
| title_full_unstemmed | Methods for Controlling Gas Turbine Casing Flows During Engine Shutdown |
| title_short | Methods for Controlling Gas Turbine Casing Flows During Engine Shutdown |
| title_sort | methods for controlling gas turbine casing flows during engine shutdown |
| topic | natural convection gas turbine shutdown casing distortion |
| url | http://www.mdpi.com/2504-186X/3/2/17 |
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