Advanced research in instrumentation and control technology: Acoustic parameter studies

Conference · Tue Dec 31 23:00:00 EST 1985

OSTI ID:6941760

Sheen, S H; Bobis, J P; Raptis, A C

In the process of developing acoustic/ultrasonic instruments for coal conversion and combustion processes, there is a need to understand various complex relations between acoustic parameters and physical properties of coal/gas and coal/liquid media so that the instrument readings and measurement accuracy can be evaluated and new sensing techniques can be developed. The primary objective of this project is to examine the theory and perform measurements of acoustic/ultrasonic parameters in such coal media. The acoustic parameters of interest are sound speed, attenuation, scattering pattern, and resonance scattering, which relate directly or indirectly to coal concentration, particle size and distribution, and rheological and thermal properties. In summary, we have developed a laboratory technique for accurate attenuation measurement in highly viscous liquids and coal slurries. For pure liquids, the attenuation in low frequency (0.8 to 2 MHz) provides a direct measurement of fluid shear viscosity. For coal slurries of low concentration (<10% by weight) attenuation in the same frequency range still follows the variation of fluid viscosity. But, for slurries of higher coal concentration, anomalous attenuation may be measured, depending on the fluid structure, which is believed to be a micor-inhomogeneous medium. 8 refs., 5 figs., 1 tab.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6941760
• Report Number(s): CONF-860961-8; ON: DE87004662
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010400 -- Coal
Lignite
&amp; Peat-- Processing
440100* -- Radiation Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACOUSTIC MEASUREMENTS
ALCOHOLS
ATTENUATION
CARBONACEOUS MATERIALS
COAL
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUEL SLURRIES
FUELS
GLYCEROL
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
MATERIALS
MEASURING INSTRUMENTS
MIXTURES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SCATTERING
SHEAR
SLURRIES
SOUND WAVES
SUSPENSIONS
ULTRASONIC WAVES
VISCOSITY
WATER