Aerodynamics of the Flow Paths of the Vacuum Unit of a Special Cleaning Vehicle in Mining Areas

and the preliminary evaluation of air parameters in the flow paths of the vacuum device are studied. Mathematical modelling of
aerodynamic processes was carried out to confirm its performance of rail and air cleaning. The spatial problem of aerohydrodynamics for a
single-phase medium by means of a fixed computational grid is solved. Modern computer packages are used for numerical simulation. As a
result of the numerical calculations, the pressure losses and maximum flow rate values in the flow paths were determined when the airflow
rate varied from 0.5 m3
/ s to 0.27 m3
/ s. The distribution fields of the velocity and pressure module in the intake duct, tank, filter element
and silencer are given. It has been shown that at different capacities of the system, the pressure drop in the suction channel ranges from 185
Pa to 300 Pa, the total pressure path loss is 2000 Pa. A mathematical simulation of the filtration and exhaust air damping processes in the
filter unit and a vacuum unit muffler was performed. It is shown that the flow rate is reduced to 80%. Analysis of the resulting flow diagrams
and aerohydrodynamic parameters confirming the performance of the vacuum unit, which manages flawlessly the mine cleaning.