Investigation of the efficiency of the ventilated perforated brake disc
This paper discusses the influence of the presence of perforations in brake discs on the efficiency of convective heat removal. As a result of the operation of the ventilation apparatus during the rotation of the brake disc, the conditions of the airflow flow through the ventilation ducts are significantly affected. The more the air flow is delayed in the body of the brake disc, the more efficient the heat exchange occurs. This effect can be achieved by increasing the length of the ventilation duct or creating a turbulent airflow. Perforations contribute to the separation of the air flow into different directions of movement, as a result of which a turbulent air flow regime is created in the ventilation duct. Perforations, in addition to the positive effect of the work, also have a negative character in the form of embrittlement of the brake disc structure. The paper presents the results of experimental studies of the efficiency of perforations in the brake disc and their impact on the operational parameters of the work.