Synchronous critical speed tracking in hydrostatic bearing supported rotorsHydrostatic bearings used in advanced turbopump designs use the pumped propellant as the working fluid and supply the propellant to the bearing from pump discharge. The resulting rotordynamic coefficients are highly speed-dependent and in some instances can cause system natural frequencies to coincide with spin speed over a wide speed range. This paper discusses this 'synchronous tracking' phenomenon. The factors affecting it are defined, and specific examples are presented. Methods which identify synchronous tracking issues early in the design process are reported, and techniques for eliminating this undesirable characteristic are addressed.
Document ID
19890059587
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Henderson, Thomas W. (Rockwell International Corp. Canoga Park, CA, United States)
Scharrer, Joseph K. (Rockwell International Corp. Rocketdyne Div., Canoga Park, CA, United States)