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NASA-TM-214341
Sealing in Turbomachinery
Year: 2006
Abstract: Clearance control is of paramount importance to turbomachinery designers and is required to meet today's aggressive power output, efficiency, and operational life goals. Excessive clearances lead to losses in cycle efficiency, flow instabilities, and hot gas ingestion into disk cavities. Insufficient clearances limit coolant flows and cause interface rubbing, overheating downstream components and damaging interfaces, thus limiting component life. Designers have put renewed attention on clearance control, as it is often the most cost effective method to enhance system performance. Advanced concepts and proper material selection continue to play important roles in maintaining interface clearances to enable the system to meet design goals. This work presents an overview of turbomachinery sealing to control clearances. Areas covered include: characteristics of gas and steam turbine sealing applications and environments, benefits of sealing, types of standard static and dynamics seals, advanced seal designs, as well as life and limitations issues.
Subject: ABRASION
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T17:31:43Z | |
| date available | 2017-09-04T17:31:43Z | |
| date copyright | 01/01/2006 | |
| date issued | 2006 | |
| identifier other | CYHOEEAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std/handle/yse/154705 | |
| description abstract | Clearance control is of paramount importance to turbomachinery designers and is required to meet today's aggressive power output, efficiency, and operational life goals. Excessive clearances lead to losses in cycle efficiency, flow instabilities, and hot gas ingestion into disk cavities. Insufficient clearances limit coolant flows and cause interface rubbing, overheating downstream components and damaging interfaces, thus limiting component life. Designers have put renewed attention on clearance control, as it is often the most cost effective method to enhance system performance. Advanced concepts and proper material selection continue to play important roles in maintaining interface clearances to enable the system to meet design goals. This work presents an overview of turbomachinery sealing to control clearances. Areas covered include: characteristics of gas and steam turbine sealing applications and environments, benefits of sealing, types of standard static and dynamics seals, advanced seal designs, as well as life and limitations issues. | |
| language | English | |
| title | NASA-TM-214341 | num |
| title | Sealing in Turbomachinery | en |
| type | standard | |
| page | 62 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2006 | |
| contenttype | fulltext | |
| subject keywords | ABRASION | |
| subject keywords | COMBUSTION CHAMBERS | |
| subject keywords | COMPRESSORS | |
| subject keywords | EROSION | |
| subject keywords | GAS TURBINES | |
| subject keywords | INGESTION (ENGINES) | |
| subject keywords | LABYRINTH SEALS | |
| subject keywords | METALS | |
| subject keywords | POWER EFFICIENCY | |
| subject keywords | SEALING | |
| subject keywords | SHROUDS | |
| subject keywords | SILICON CARBIDES | |
| subject keywords | STEAM TURBINES | |
| subject keywords | TENSILE STRENGTH | |
| subject keywords | TURBOMACHINERY |