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Title: ANL Doppler flowmeter

Abstract

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.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (USA)
OSTI Identifier:
6411616
Report Number(s):
ANL/FE-85-14
ON: DE86006158
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
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, Lignite, & Peat- Hydrogenation & Liquefaction; 013000 - Coal, Lignite, & Peat- Transport, Handling, & Storage; 440300 - Miscellaneous Instruments- (-1989)

Citation Formats

Karplus, H B, Raptis, A C, Lee, S, and Simpson, T. ANL Doppler flowmeter. United States: N. p., 1985. Web.
Karplus, H B, Raptis, A C, Lee, S, & Simpson, T. ANL Doppler flowmeter. United States.
Karplus, H B, Raptis, A C, Lee, S, and Simpson, T. 1985. "ANL Doppler flowmeter". United States.
@article{osti_6411616,
title = {ANL Doppler flowmeter},
author = {Karplus, H B and Raptis, A C and Lee, S and Simpson, T},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6411616}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 1985},
month = {Tue Oct 01 00:00:00 EDT 1985}
}

Technical Report:
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