Simulations of dust dynamics around a cone hood in updraft conditions

Journal of Occupational and Environmental Hygiene
K I LogachevO A Averkova

Abstract

A cone hood is an efficient device for capturing dust releases generated by a variety of process equipment. For stationary airflow conditions, a circular cone hood with a round flange is the most efficient design. The goal of this paper is to determine the effect that inflow velocity, suction velocity and terminal settling velocity of dust particles have on the aspiration coefficient in combination with hood length and inclination angle. No studies have yet addressed the efficiency of an exhaust hood facing an updraft flow of air with suspended dust particles. To simulate the moving fluid, we used the discrete vortices method accounting for flow separation at sharp edges of the cone hood. A custom test bench was built to validate the velocity field distribution around the exhaust hood. To evaluate capture efficiency, we determined the aspiration coefficient using plotted limiting trajectories of dust particles by solving equations of particle dynamics numerically in view of gravity and various streamlining airflow patterns. In order to validate our estimate of the aspiration coefficient, we compared our findings with regularities identified by earlier researchers for a simpler problem of dust-air mixture approaching a circular ...Continue Reading

References

Oct 24, 2001·AIHAJ : a Journal for the Science of Occupational and Environmental Health and Safety·R F HuangC C Chen
Jul 9, 2004·Journal of Occupational and Environmental Hygiene·Rong Fung HuangChih-Chieh Chen
Nov 28, 2008·Journal of Environmental Monitoring : JEM·Peter GörnerJean-François Fabriès
Mar 31, 2012·The Annals of Occupational Hygiene·Michael R Flynn, Pam Susi

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Citations

Aug 29, 2020·Journal of the Air & Waste Management Association·Yang LiuXiaochuan Li

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ANSYS Academic Research
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