Accession Number : ADD015249

Title :   Transient Impeller Test Facility.

Descriptive Note : Patent, filed 24 Dec 90, patented 7 Jan 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Lefebvre, Paul J

Report Date : 07 Jan 1992

Pagination or Media Count : 4

Abstract : A system is described for testing a pump or a turbine impeller under transient operating conditions in a fluid flow. The system provides simultaneously, as a function of time, user defined impeller speeds, fluid flow rate and rise in fluid pressure so as to simulate real conditions. This information can be used to analyze the performance of existing impellers or for designating new impellers. There are very few existing facilities which can operate a pump or turbine impeller under general and user defined transient conditions throughout the transient. Old facilities operated under either steady-state conditions or specific transient conditions with no provision for defining the desired conditions throughout the transient. Steady-state operations is defined here as when the impeller rotates at constant speeds with constant flow rate and pressure rise. Transient operation is defined as when the impeller undergoes acceleration or deceleration (such as at pump start-up or shut down) and the impeller speed, flow rate and pressure rise all change with time.

Descriptors :   ACCELERATION, DECELERATION, FACILITIES, FLOW RATE, FLUID FLOW, FLUIDS, IMPELLERS, OPERATION, PRESSURE, PRESSURE GRADIENTS, PUMPS, STARTING, STEADY STATE, TEST FACILITIES, TRANSIENTS, TURBINES, USER NEEDS, VELOCITY

Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs

Distribution Statement : APPROVED FOR PUBLIC RELEASE