Investigation of porous cooling in the ventilation apparatus of a rolling stock brake disc.

Based on the study, it can be concluded that the use of porous cooling in the form of separate inserts into the finned ventilation apparatus will be an additional source of heat removal from heated surfaces. The use of porous inserts reduces the thermal boundary layer of the air flow of the brake disc ventilation ducts. This is ensured by an additional change of air masses in the boundary layer rather than using a solid impermeable rib of the ventilation apparatus. After theoretical studies of the parameters of porous cooling, mathematical modeling of the parameters of influence on the efficiency of porous cooling and air flow rate when passing through the porous inserts was carried out. With an increase in the length of the porous insert, the efficiency of porous cooling and the flow rate of the air flow through the porous insert decreased. The intensity of the decrease was determined by the flow regime of the air flow in the thermal boundary layer and the order of the value of the air flow rate. [ABSTRACT FROM AUTHOR]