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Flow characteristics of fresh air discharged from a ventilation duct for mine ventilation

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Abstract

Regarding mine ventilation in a tunnel with one mining face, the turbulent flow structure and Mean age of air (MAA) of fresh air discharged from the ventilation ducts are numerically studied using the commercial CFD code, ANSYS CFX 17.0. The characteristics of the three-dimensional turbulent transport and fluid age are considered to provide new insight to design ventilation ducts. For the optimal design of ventilation ducts, parametric studies are conducted. In particular, the effects of duct angles, distances between the duct outlet and mining face, and fresh air velocities are numerically evaluated with respect to the MAA. Flow streamlines, velocity vectors, MAA, eddy viscosity, and total pressure in the tunnel of a mine with ventilation ducts are presented. The variation in the MAA with the angle, distance, and velocity is considered for the optimal design of ventilation ducts. Overall, the numerically predicted results describe the optimal designing points of a ventilation duct in the working area of a mine with heading faces by using the MAA.

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Correspondence to Jongmyung Park.

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Recommended by Associate Editor Simon Song

Jongmyung Park received B.S., M.S. in mechanical engineering from Hanyang University in 1994 and 1996. He obtained his Ph.D. in mechanical engineering of University of Utah, USA in 2006. His fields of research interest are CFD, Heat Transfer Augmentation, Turbulence, and MineVentilation.

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Park, J., Jo, Y. & Park, G. Flow characteristics of fresh air discharged from a ventilation duct for mine ventilation. J Mech Sci Technol 32, 1187–1194 (2018). https://doi.org/10.1007/s12206-018-0222-9

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  • DOI: https://doi.org/10.1007/s12206-018-0222-9

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