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- W45245891 abstract "The service life of an injector nozzle in a diesel engine fueled with of coal/water slurry (CWS) is 2-5 h, which limits the continuous running time of the engine. This study of CWS flow and erosion in injector nozzles was initiated to provide an analytical tool, validated by experiment, for designing a durable injector and predicting long-term wear from limited test runs. The two-phase hydrodynamic theory of solid/liquid slurry flow has been extended to incorporate the constitutive relationship for power-law non-Newtonian behavior. A computer model has been developed to predict the spatial and temporal variations in solid and liquid velocities, viscosities, and concentrations under the high shear rates encountered in diesel injection systems. The model has been validated using Newtonian, single phase flow data obtained with water or No. 2 diesel fuel and non-Newtonian, two-phase flow data using a CWS. The computed and measured viscosities and shear rates showed good agreement. Viscosities of four micronized CWS samples were measured at shear rates between 3000 and 30,000 sec/sup /minus/1/ in a high-pressure/high-shear capillary tube system of a rotational viscometer. The complex CWS flow at high shear depended on coal particle size, temperature, coal loading, additives, and the shear rate. 40 refs.,more » 19 figs., 6 tabs.« less" @default.
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- W45245891 date "1988-08-01" @default.
- W45245891 modified "2023-09-24" @default.
- W45245891 title "Viscosity of coal/water slurries at high shear rates" @default.
- W45245891 hasPublicationYear "1988" @default.
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