Research on Brake Pads Particle Emissions and Temperature Reduction of a Brake Disc in Air Controlling System.
2022-01-0390
03/29/2022
- Content
- This paper addresses the brake pad particles emitted during the braking process of a vehicle in motion. The frictional-constant contact between the disc brake and brake pads generates thermal energy as a result of increased temperature within the brake disc causing wear of the brake pads. Emission of brake pad particles into the atmosphere leads to an increase in air pollution in the environment and hence becomes hazardous to the human body. In this paper, the wheel brake disc is installed in a ventilated system where the specific airflow encompassing the disc brake accounts for thermal performance and pad particle emission from the brake pads. The mathematical model of the fundamental parameters of the brake disc and ventilation is established and the behavior of heat transfer coefficient, heat generation, heat flux, temperature rise, airflow rates, brake disc cooling time, inlet and outlet speed on the ventilation system with the brake disc are carried using computational fluid dynamics (CFD). The rate of pad particle emissions from the brake pads is calculated under the assumption of uniform constant pressure distribution at the contact surface of the brake disc and brake pad. The analysis results show that circumferential airflow direction within the ventilation system is uniform with the rotation direction of the brake disc and pad particles are dispersed by the axial direction of airflow. The CFD simulation also showed that the airflow around the brake disc reduced the temperature of the disc by 20%. The validity of the ventilation model was verified with Finite Element Method (FEM).
- Citation
- sarvar, Y., and Fayzullayevich, J., "Research on Brake Pads Particle Emissions and Temperature Reduction of a Brake Disc in Air Controlling System.," SAE Technical Paper 2022-01-0390, 2022, .