Simulation of ventilation and fire in the underground facilities

Cheng, Lin-Wen; Ueng, TH; Liu, Chen‐Wuing

doi:10.1016/s0379-7112(01)00013-3

Cited by 62 publications

(37 citation statements)

References 5 publications

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“…In terms of mine ventilation, many numerical or experimental researches have been done [3][4][5][6][7]. However, as for the recirculation of airflows, rare study has been focused on it.…”

Section: Fig 1 -An Example Of Recirculation Airflow In An Undergrounmentioning

confidence: 99%

Application of Depth-First Search Method in Finding Recirculation in Mine Ventilation System

Huaming¹,

Shi²,

Wang³

et al. 2017

CEJ

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Recirculation of airflows in a mine ventilation system can cause concentration of contaminated air which results in an unsafe working environment for people working in an underground mine. Due to the difficulty in finding the recirculation of airflows in complicated mine ventilation system, depth-first search method is proposed to find the recirculation of airflows in complicated mine ventilation systems. The searching procedure of a simply depth-first search method is introduced briefly. Then the depth-first search method is modified for searching recirculation of airflows in complicated mine ventilation systems. The proposed method is implemented through MATLAB in the form of storing ventilation information in a matrix. A few recirculation of airflows are found and are confirmed by the mine ventilation simulation result. It is concluded that the proposed method is a valuable tool in finding recirculation of airflows in a complicated mine ventilation system.

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“…In terms of mine ventilation, many numerical or experimental researches have been done [3][4][5][6][7]. However, as for the recirculation of airflows, rare study has been focused on it.…”

Section: Fig 1 -An Example Of Recirculation Airflow In An Undergrounmentioning

confidence: 99%

Application of Depth-First Search Method in Finding Recirculation in Mine Ventilation System

Huaming¹,

Shi²,

Wang³

et al. 2017

CEJ

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“…The comparison is shown on the lower picture: It is clear that the tunnel models with natural and longitudinal ventilation take the whole section of the tunnel, however the tunnel models with semi transverse and transverse ventilation consider only the light section of the tunnel (without the ventilation drains). The suction flaps are defined with the speed margin condition on the limit of the calculating domain (Cheng et al, 2001). …”

Section: Initial Boundary Conditions and Discretizationmentioning

confidence: 99%

Fluid Dynamic Models Application in Risk Assessment

Vidmar¹,

Petelin²,

Perkovič³

2012

Fluid Dynamics, Computational Modeling and Applications

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“…In the case of fire, the transportation of smoke along the tunnel is altered by its slope, length, traffic, etc., and the obstruction of the ventilation ports increase a different variable in the analysis of physical scenario apart from external weather conditions [17][18][19][20][21][22][23][24][25]. The complexity of the situation creates the need not only for the creation of general but for particular emergency response procedures [26].…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Obstructed Ventilation Ports in a Subway Tunnel Section

Herrera¹,

Pineda²,

Silva-Rivera

et al. 2017

Int. j. simul. model.

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A CFD simulation of the air velocity in a subway tunnel section of 1400 m in length is presented. In this case of study; the simulation compares the air velocity changes when two of six natural ventilation ports are totally obstructed. They are required for hot air exhaust, smoke release and fresh air intake. The mechanical ventilation system is located inside the tunnel at 650 m from the end of a passenger platform and 750 m from the other, it is a non-symmetrical scenario. The simulation was carried in ANSYS® Fluent compared with NFPA calculation and considering geometries and dimensions of an actual subway section of the Mexico City. Four different numerical models were created to analyse eight different cases. The results indicate that the obstruction of the ports create a non-homogeneous distribution of the flow velocity inside the passenger platform with an approximate difference of 1.5 m/s. This value is very important in cases when the backlayering effect has to be avoided as in the case of smoke transportation, exhaust of smoke and the transport of dust or some other contaminant. The emergency procedures and the design of escape routes can be improved by considering the physical changes occurring when the ventilation ports are obstructed. Since the atmospheric pressure influence the direction and velocity of the flow coming from the non-obstructed vents.

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Simulation of ventilation and fire in the underground facilities

Cited by 62 publications

References 5 publications

Application of Depth-First Search Method in Finding Recirculation in Mine Ventilation System

Application of Depth-First Search Method in Finding Recirculation in Mine Ventilation System

Fluid Dynamic Models Application in Risk Assessment

CFD Simulation of Obstructed Ventilation Ports in a Subway Tunnel Section

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