Accession Number : ADA268678

Title :   Experimental Studies of Fluid-Borne Noise Generation in a Marine Pump.

Descriptive Note : Master's thesis.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF OCEAN ENGINEERING

Personal Author(s) : McGee, David M.

Report Date : MAY 1993

Pagination or Media Count : 175

Abstract : Experimental studies were carried out to determine the influence of pump rotational speed, flow rate, and the addition of long-chain polymers on the broadband and tonal noise generated from the fluid flow in a centrifugal water pump. A theoretical model is presented which relates the tonal noise generation to the static pressure field at the impeller discharge. Using the pump in its original casing, measurements were made of the static pressure distribution at impeller exit under various operating conditions. Attempts were made to correlate the static pressure field at impeller exit with the observed acoustic spectra at pump inlet under these conditions. The results showed fair agreement with the theory at shaft and blade passage frequencies as well as some of the other harmonics. However, the unusually invariant flow conditions at the impeller exit over a wide range of conditions limited the number of conclusions which could be drawn from the experiments.

Descriptors :   *FLUIDS, *NOISE, *WATER PUMPS, *NOISE GENERATORS, *CENTRIFUGAL PUMPS, ACOUSTICS, BLADES, BROADBAND, CHAINS, EXITS, FLOW RATE, FLUID FLOW, FREQUENCY, HARMONICS, IMPELLERS, INLETS, MEASUREMENT, MODELS, POLYMERS, PRESSURE DISTRIBUTION, SPECTRA, STATIC PRESSURE, VELOCITY, THESES, ROTATION, VELOCITY, EXPERIMENTAL DATA.

Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Fluid Mechanics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE