Accession Number : AD0712412


Title :   MEASUREMENT OF SOUND VELOCITY IN A SOLID-GAS MIXTURE


Descriptive Note : Final rept.


Corporate Author : AEROSPACE RESEARCH LABS WRIGHT-PATTERSON AFB OH


Personal Author(s) : Turman, B N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/712412.pdf


Report Date : Jul 1970


Pagination or Media Count : 50


Abstract : Velocity of sound through a two-component (solid-gas) medium was measured as a function of solid particle concentration. A method was devised in which phase angle between a sound source signal and microphone signal could be measured as a function of solid particle density in the apparatus. Acoustical theory provided the necessary relationship between phase angle, density, and sound velocity. Sound velocity in the two-component medium was measured over a particle volume fraction range from 0.0001 to 0.5. The possibility of using this technique as a diagnostic instrument is discussed.


Descriptors :   *SOUND TRANSMISSION , VELOCITY , POWDERS , SHOCK WAVES , FLOW FIELDS , COLLOIDS , MICROPHONES , TWO PHASE FLOW , LOUDSPEAKERS , ACOUSTIC IMPEDANCE


Subject Categories : Acoustics
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE