ANL Doppler flowmeter

Technical Report · Tue Oct 01 00:00:00 EDT 1985

OSTI ID:6411616

Karplus, H B; Raptis, A C; Lee, S; Simpson, T

A flowmeter has been developed for measuring flow velocity in hot slurries. The flowmeter works on an ultrasonic Doppler principle in which ultrasound is injected into the flowing fluid through the solid pipe wall. Isolating waveguides separate the hot pipe from conventional ultrasonic transducers. Special clamp-on high-tempreature transducers also can be adapted to work well in this application. Typical flows in pilot plants were found to be laminar, giving rise to broad-band Doppler spectra. A special circuit based on a servomechanism sensor was devised to determine the frequency average of such a broad spectrum. The device was tested at different pilot plants. Slurries with particulates greater than 70 m (0.003 in.) yielded good signals, but slurries with extremely fine particulates were unpredictable. Small bubbles can replace the coarse particles to provide a good signal if there are not too many. Successful operation with very fine particulate slurries may have been enhanced by the presence of microbubbles. 11 refs., 46 figs., 3 tabs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 6411616
• Report Number(s): ANL/FE-85-14; ON: DE86006158
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
47 OTHER INSTRUMENTATION
COAL LIQUEFACTION PLANTS
FLOWMETERS
PERFORMANCE TESTING
SLURRIES
FLOW RATE
BUBBLES
DOPPLER EFFECT
LAMINAR FLOW
SOUND WAVES
TURBULENT FLOW
DISPERSIONS
FLUID FLOW
INDUSTRIAL PLANTS
MEASURING INSTRUMENTS
METERS
MIXTURES
SUSPENSIONS
TESTING
010405* - Coal
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