Experimental Study of Micronized Coal/Water Slurry Rheology at High Shear Rates

[+] Author and Article Information
Y. I. Cho

Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104

U. S. Choi

Materials and Components Technology Division, Argonne National Laboratory, Argonne, IL 60439

J. Energy Resour. Technol 112(1), 36-40 (Mar 01, 1990) (5 pages) doi:10.1115/1.2905710 History: Received April 24, 1989; Revised November 02, 1989; Online April 16, 2008


The rheological behavior of four micronized coal water slurry (CWS) samples was studied experimentally for a wide range of shear rates between 3 and 30,000 s−1 . The systematic rheological characterization of the slurry fuel shows that the rheological behavior of these CWS is very complex and depends on coal particle size, temperature, coal loading, conditioning additives, and the capillary tube diameter as well as the shear rate. This study indicates that better appreciation of the unique and complex rheological behavior of non-Newtonian CWS fuels is vital to developing high-quality slurries suitable for use in coal-fired diesel engines, and suggests that a more comprehensive data base for CWS rheology under actual diesel engine operating conditions is needed prior to using such CWS fuels in diesel engines.

Copyright © 1990 by The American Society of Mechanical Engineers
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