Global ETD Search
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Showing 1 to 6 of 6 for “"Air quantity"”.
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Investigating blast fume propagation, concentration and clearance in underground mines using computational fluid dynamics (CFD)
… optimal post-blast re-entry time and optimal air quantity in underground mines. An important factor associated with blast fume dilution and clearance, the fan duct discharge location, needs to be studied in details. To achieve the above goals, the computational fluid dynamics (CFD) method is …
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Performance tests and cooling effect distribution of the V.P.I. forced draft cooling tower
… of models, similar to the research conducted on airplanes in wind tunnels and on boat hulls in towing tanks, is necessary. Models used should be so constructed that quantity, condition, and velocity of air; quantity and condition of water; and type and arrangement of filling may be controlled. It …
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A detailed justification for the selection of a novel mine tracer gas and development of protocols for GC-ECD analysis of SPME sampling in static and turbulent conditions for assessment of underground mine ventilation systems
… gas surveys are a powerful means of assessing air quantity in underground mine ventilation circuits. The execution of a tracer gas style ventilation survey allows for the direct measurement of air quantity in locations where this information is otherwise unattainable. Such instances include …
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CFD modeling of a tailgate ventilation condition in a longwall bleeder system
… Dynamics (CFD), the interaction between the air flow at the longwall face and factors that contribute to accumulations around the face can be modeled and visualized in great detail. The results confirm that the tailgate corner of the longwall face is a critical area prone to face ignitions …
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Modification of crumb rubber cement interface and its effect on strength and viscoelastic properties
… gap is present; furthermore, entrapped air, microcracks, and inconsistent degree of hydration of cement paste has been observed at the transition zone. The research work presented here attempts to improve understanding about what conditions alter the local microstructure of crumb rubber …
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Flow characteristics of jet fans in mines: experimental and numerical modeling
… initially to verify the potential of free air jets in mine ventilation. A laboratory model using water as the fluid medium was designed to study the flow characteristics of a jet fan in a blind entry. The model was tested in a variety of brattice curtain and nozzle combinations to …