Noise Generation by Air Bubbles in Water: An Experimental Study of Creation and Splitting

Abstract

Although the study of two-phase flow, especially air-water mixtures, has received much attention in recent years, little has been done concerning the noise generated by non-cavitating air water flows. The main purpose of this work is to examine these flows; in particular, to look at the noise associated with the creation of air bubbles at a nozzle, and the noise radiated by air bubbles splitting in the shear layer of a submerged turbulent water jet. Experiments were conducted to measure the sound pressure levels associated with bubble creation and bubble splitting, under a variety of conditions. Comparison were made with existing theories. An improved physical understanding of the mechanism of noise generation was gained through data analysis and photographic studies. Recommendations for further research are given.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1987
Accession Number
ADA192063

Entities

People

  • Kenneth W. Frizell
  • Roger E. Arndt

Organizations

  • University of Minnesota

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Acoustics
  • Boundary Layer
  • Flow Fields
  • Fluid Dynamics
  • Fluid Mechanics
  • Hydrodynamics
  • Measurement
  • Mechanics
  • Pressure Distribution
  • Pressure Gradients
  • Sound Pressure
  • Static Pressure
  • Surface Tension
  • Test Facilities
  • Turbulent Flow
  • Turbulent Mixing
  • Two Phase Flow

Readers

  • Acoustical Oceanography.
  • Combustion and Flow Dynamics.
  • Fluid Mechanics and Fluid Dynamics.