Performance Evaluation in a Fully Purged High-Pressure Turbine Stage Using Seed Gas Concentration Measurements
The efficiency assessment of a high-pressure turbine (HPT) stage is complicated by the presence of upstream and downstream purge flows. In fact, the efficiency calculation is often based on mass flow-averaged values of total temperature at the stage inlet and outlet planes. Moreover, the purge flow...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | International Journal of Turbomachinery, Propulsion and Power |
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| Online Access: | https://www.mdpi.com/2504-186X/8/3/22 |
| _version_ | 1797579579988115456 |
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| author | Filippo Merli Nicolas Krajnc Asim Hafizovic Emil Göttlich |
| author_facet | Filippo Merli Nicolas Krajnc Asim Hafizovic Emil Göttlich |
| author_sort | Filippo Merli |
| collection | DOAJ |
| description | The efficiency assessment of a high-pressure turbine (HPT) stage is complicated by the presence of upstream and downstream purge flows. In fact, the efficiency calculation is often based on mass flow-averaged values of total temperature at the stage inlet and outlet planes. Moreover, the purge flow distribution in the annulus is usually unknown and therefore assumed to be uniform. This paper presents and applies an alternative method to calculate the efficiency of a fully purged HPT stage. Such a definition relies on seed gas concentration measurements at the HPT stage outlet plane to determine the outlet purge flow distribution. After comparing the alternative method to the standard definition (based on the assumption of uniform purge) for the nominal purge case, the efficiency variation between the case with nominal purge and the case without purge is investigated. |
| first_indexed | 2024-03-10T22:38:09Z |
| format | Article |
| id | doaj.art-61b23cd639fa4722a15156dd2ca52394 |
| institution | Directory Open Access Journal |
| issn | 2504-186X |
| language | English |
| last_indexed | 2024-03-10T22:38:09Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Turbomachinery, Propulsion and Power |
| spelling | doaj.art-61b23cd639fa4722a15156dd2ca523942023-11-19T11:13:00ZengMDPI AGInternational Journal of Turbomachinery, Propulsion and Power2504-186X2023-07-01832210.3390/ijtpp8030022Performance Evaluation in a Fully Purged High-Pressure Turbine Stage Using Seed Gas Concentration MeasurementsFilippo Merli0Nicolas Krajnc1Asim Hafizovic2Emil Göttlich3Institute of Thermal Turbomachinery and Machine Dynamics, Graz University of Technology, Inffeldgasse 25A, 8010 Graz, AustriaInstitute of Thermal Turbomachinery and Machine Dynamics, Graz University of Technology, Inffeldgasse 25A, 8010 Graz, AustriaInstitute of Thermal Turbomachinery and Machine Dynamics, Graz University of Technology, Inffeldgasse 25A, 8010 Graz, AustriaInstitute of Thermal Turbomachinery and Machine Dynamics, Graz University of Technology, Inffeldgasse 25A, 8010 Graz, AustriaThe efficiency assessment of a high-pressure turbine (HPT) stage is complicated by the presence of upstream and downstream purge flows. In fact, the efficiency calculation is often based on mass flow-averaged values of total temperature at the stage inlet and outlet planes. Moreover, the purge flow distribution in the annulus is usually unknown and therefore assumed to be uniform. This paper presents and applies an alternative method to calculate the efficiency of a fully purged HPT stage. Such a definition relies on seed gas concentration measurements at the HPT stage outlet plane to determine the outlet purge flow distribution. After comparing the alternative method to the standard definition (based on the assumption of uniform purge) for the nominal purge case, the efficiency variation between the case with nominal purge and the case without purge is investigated.https://www.mdpi.com/2504-186X/8/3/22high-pressureturbinecavitypurgerim sealperformance |
| spellingShingle | Filippo Merli Nicolas Krajnc Asim Hafizovic Emil Göttlich Performance Evaluation in a Fully Purged High-Pressure Turbine Stage Using Seed Gas Concentration Measurements International Journal of Turbomachinery, Propulsion and Power high-pressure turbine cavity purge rim seal performance |
| title | Performance Evaluation in a Fully Purged High-Pressure Turbine Stage Using Seed Gas Concentration Measurements |
| title_full | Performance Evaluation in a Fully Purged High-Pressure Turbine Stage Using Seed Gas Concentration Measurements |
| title_fullStr | Performance Evaluation in a Fully Purged High-Pressure Turbine Stage Using Seed Gas Concentration Measurements |
| title_full_unstemmed | Performance Evaluation in a Fully Purged High-Pressure Turbine Stage Using Seed Gas Concentration Measurements |
| title_short | Performance Evaluation in a Fully Purged High-Pressure Turbine Stage Using Seed Gas Concentration Measurements |
| title_sort | performance evaluation in a fully purged high pressure turbine stage using seed gas concentration measurements |
| topic | high-pressure turbine cavity purge rim seal performance |
| url | https://www.mdpi.com/2504-186X/8/3/22 |
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