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NASA-LLIS-0964
Lessons Learned – Space Shuttle Main Engine (SSME): Dry Gaseous Purges
Year: 1995
Abstract: Description of Driving Event:
Prior to starting the engine, there is a period of time referred to as the start preparation phase. At the beginning of this time period, the oxidizer side of the engine is purged with dry nitrogen to eliminate moisture and the fuel side is purged with dry helium to eliminate air as well as moisture. This prevents the formation of ice particles in the LOX system or air frozen by the hydrogen.
Prior to starting the engine, there is a period of time referred to as the start preparation phase. At the beginning of this time period, the oxidizer side of the engine is purged with dry nitrogen to eliminate moisture and the fuel side is purged with dry helium to eliminate air as well as moisture. This prevents the formation of ice particles in the LOX system or air frozen by the hydrogen.
Subject: Configuration Management
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T15:22:56Z | |
| date available | 2017-09-04T15:22:56Z | |
| date copyright | 05/15/1995 | |
| date issued | 1995 | |
| identifier other | NDUEQCAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/23145 | |
| description abstract | Description of Driving Event: Prior to starting the engine, there is a period of time referred to as the start preparation phase. At the beginning of this time period, the oxidizer side of the engine is purged with dry nitrogen to eliminate moisture and the fuel side is purged with dry helium to eliminate air as well as moisture. This prevents the formation of ice particles in the LOX system or air frozen by the hydrogen. | |
| language | English | |
| title | NASA-LLIS-0964 | num |
| title | Lessons Learned – Space Shuttle Main Engine (SSME): Dry Gaseous Purges | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1995 | |
| contenttype | fulltext | |
| subject keywords | Configuration Management | |
| subject keywords | Cryogenic Systems | |
| subject keywords | Ground Equipment | |
| subject keywords | Hardware | |
| subject keywords | Launch Vehicle | |
| subject keywords | Parts Materials & Processes | |
| subject keywords | Safety & Mission Assurance | |
| subject keywords | Spacecraft | |
| subject keywords | Test Article | |
| subject keywords | Test Facility |