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NASA-LLIS-0966

Lessons Learned – Space Shuttle Main Engine (SSME): Fuel System Oscillations

contributor authorNASA - National Aeronautics and Space Administration (NASA)
date accessioned2017-09-04T17:55:43Z
date available2017-09-04T17:55:43Z
date copyright05/15/1995
date issued1995
identifier otherFKUEQCAAAAAAAAAA.pdf
identifier urihttp://yse.yabesh.ir/std/handle/yse/178932
description abstractDescription of Driving Event:
After the main fuel valve starts to open, three oxidizer valves in the SSME are separately subjected to a series of position commands to precisely control oxidizer system priming times for the three combustors. The first oxidizer valve to be commanded is the fuel preburner oxidizer valve (FPOV). After a delay of 0.100 seconds, the FPOV is ramped to 56 percent open at its maximum skew rate. At 0.72 seconds, the FPOV is given a "notch" command to close about 10%. Just prior to the third fuel system oscillation, second "notch" command is given.
languageEnglish
titleNASA-LLIS-0966num
titleLessons Learned – Space Shuttle Main Engine (SSME): Fuel System Oscillationsen
typestandard
page2
statusActive
treeNASA - National Aeronautics and Space Administration (NASA):;1995
contenttypefulltext
subject keywordsConfiguration Management
subject keywordsCryogenic Systems
subject keywordsGround Equipment
subject keywordsHardware
subject keywordsLaunch Vehicle
subject keywordsParts Materials & Processes
subject keywordsSafety & Mission Assurance
subject keywordsSpacecraft
subject keywordsTest Article
subject keywordsTest Facility


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