ANÁLISIS DEL CAUDAL EN UN DISCO DE FRENO AUTOMOTRIZ CON ÁLABES DE VENTILACIÓN TIPO NACA 66-209, UTILIZANDO VELOCIMETRÍA POR IMÁGENES DE PARTÍCULAS

The automotive braking system must meet a complex set of requirements, among which safety is the most important, which is based on the function of the geometric arrangement and the type of material. The objective of this work is to propose a new geometric arrangement for the optimization of the air flow in an automotive brake disc, considering ventilation pillars founded on aerodynamic profiles type NACA 66-209. To support this design proposal, a 1: 1 scale prototype was made by means of additive manufacturing and an installation was also designed, which allows the assembly of the disk to measure the velocity field generated in the suction and discharge zone through the use of the Velocimetry by Particle Images (VPI). Validation of the geometric arrangement was performed under five (5) angular velocity conditions: 541, 641, 741, 841 and 941 rpm. The results obtained from the optimization of air velocity in the discharge zone of 0.1151 and 0.2317 m/s at 35 rpm. The results show the importance of experimental designs with which the geometry of self-ventilated disc brakes can be improved, thus guaranteeing the efficiency and safety of the system.