Space Shuttle Main Engine fuel preburner augmented spark igniter shutdown detonationsDetonations were experienced in the Space Shuttle Main Engine fuel preburner (FPB) augmented spark igniter (ASI) during engine cutoff. Several of these resulted in over pressures sufficient to damage the FPB ASI oxidizer system. The detonations initiated in the FPB ASI oxidizer line when residual oxidizer (oxygen) in the line mixed with backflowing fuel (hydrogen) and detonated. This paper reviews the damage history to the FPB ASI oxidizer system, an engineering assessment of the problem cause, a verification of the mechanisms, the hazards associated with the detonations, and the solution implemented.
Document ID
19860057908
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Dexter, C. E. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Mccay, T. D. (NASA Marshall Space Flight Center Huntsville, AL, United States)