FLOW NOISE STUDY OF WATER FLOWING THROUGH PIPES

Abstract

Sound pressure fluctuations produced by the turbulent flow of water through 0.494-inch 1D pipe of glass, plastic, and brass were measured at controlled flow rates from 0.65 to 9.6 fps, in the absence of extraneous noise. Hydrophone pickups, pipe wall fluctuations, and pressure differential along the boundary layer were recorded, reduced to quantitative graphic form, and were analyzed by harmonic and numerical methods. Broadband magnitudes were related to Reynolds numbers, pressure spectra were derived, and autocorrelations and power spectra were related. Theoretical methods for computing values of water flow noise were compared with quantitive findings, and a method for approximating the magnitude of flow noise for a range of conditions was derived.

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Document Details

Document Type
Technical Report
Publication Date
May 13, 1964
Accession Number
AD0603589

Entities

People

  • P. O. Laitinen

Organizations

  • Navy Electronics Laboratory

Tags

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Dynamic Pressure
  • Energy Transfer
  • Fluid Dynamics
  • Fluid Mechanics
  • Froude Number
  • Hydrodynamics
  • Measurement
  • Mechanics
  • Modulus Of Elasticity
  • Numerical Analysis
  • Periodic Functions
  • Pipe Flow
  • Stress Strain Relations
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Electrical Engineering
  • Fluid Mechanics and Fluid Dynamics.