NDLI: Fluctuating pressure environments and hydrodynamic radial force mitigation for a two blade unshrouded inducer

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Fluctuating pressure environments and hydrodynamic radial force mitigation for a two blade unshrouded inducer

Content Provider	NASA Technical Reports Server (NTRS)
Author	Mulder, Andrew Skelley, Stephen
Copyright Year	2011
Description	Fluctuating pressure data from water flow testing of an unshrouded two blade inducer revealed a cavitation induced oscillation with the potential to induce a radial load on the turbopump shaft in addition to other more traditionally analyzed radial loads. Subsequent water flow testing of the inducer with a rotating force measurement system confirmed that the cavitation induced oscillation did impart a radial load to the inducer. After quantifying the load in a baseline configuration, two inducer shroud treatments were selected and tested to reduce the cavitation induced load. The first treatment was to increase the tip clearance, and the second was to introduce a circumferential groove near the inducer leading edge. Increasing the clearance resulted in a small decrease in radial load along with some steady performance degradation. The groove greatly reduced the hydrodynamic load with little to no steady performance loss. The groove did however generate some new, relatively high frequency, spatially complex oscillations to the flow environment.
File Size	3170574
Page Count	25
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120002966
Archival Resource Key	ark:/13960/t13n74v02
Language	English
Publisher Date	2011-12-05
Access Restriction	Open
Subject Keyword	Aircraft Propulsion And Power Piezoelectric Motors Turbine Pumps Rotor Blades Turbomachinery Shrouds Impellers Oscillations Cavitation Flow Water Flow Pressure Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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