NDLI: Fluctuating pressures in pump diffuser and collector scrolls, part 1

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Fluctuating pressures in pump diffuser and collector scrolls, part 1

Content Provider	NASA Technical Reports Server (NTRS)
Author	Sloteman, Donald P.
Copyright Year	1989
Description	The cracking of scroll liners on the SSME High Pressure Fuel Turbo Pump (HPFTP) on hot gas engine test firings has prompted a study into the nature of pressure fluctuations in centrifugal pump states. The amplitudes of these fluctuations and where they originate in the pump stage are quantified. To accomplish this, a test program was conducted to map the pressure pulsation activity in a centrifugal pump stage. This stage is based on typical commercial (or generic) pump design practice and not the specialized design of the HPFTP. Measurements made in the various elements comprising the stage indicate that pulsation activity is dominated by synchronous related phenomena. Pulsation amplitudes measured in the scroll are low, on the order of 2 to 7 percent of the impeller exit tip speed velocity head. Significant non-sychronous pressure fluctuations occur at low flow, and while of interest to commercial pump designers, have little meaning to the HPFTP experience. Results obtained with the generic components do provide insights into possible pulsation related scroll failures on the HPFTP, and provide a basis for further study.
File Size	13176463
Page Count	478
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19910015241
Archival Resource Key	ark:/13960/t59d1v540
Language	English
Publisher Date	1989-08-01
Access Restriction	Open
Subject Keyword	Fluid Mechanics And Heat Transfer Cracks Turbine Pumps Rocket Linings Space Shuttle Main Engine Pressure Oscillations Centrifugal Pumps Diffusers Engine Tests Pressure Pulses Pump Impellers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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