Influence of added aerodynamic resistance on stabilization of an air flow in mine air heater

Investigation into the wind speed effect on operation of open fanless air heater in Gramoteinskaya mine, Yuzhkuzbassugol, enabled to find that at a wind speed of more than 10 m/s from the leeward side of the building the heated air is discharged into the atmosphere. An experiment was performed on a physical model in the air channel of a boundary shaft at Gramoteinskaya mine in terms of the similarity conditions: geometric, kinematic and dynamic ones. At the stable fan operation mode the airflow velocity in the channel was measured before the aerodynamic resistance and after it for 10 minutes at regular intervals. Additional aerodynamic resistance provides at average twofold reduction in the airflow speed.