Optimization model of automobile brake cooling in forced convection mode

Abstract

One of the most important components in a road vehicle is its braking system. It is mainly used to decelerate vehicles. In vehicles friction brakes can be grouped into drum and disc brakes. Comparatively disc brakes having more advantages over drum brakes. A brake disc usually made of Gray cast iron or Ceramic composites is connected to the wheel or the axle. In this Brake Disc Rotor, high amount of heat is produced (up to 900°C) in a fraction of second due to high-performance driving and when going down a long steep hill. Gray cast irons maintain their mechanical properties up to 500°C approximately. Above this temperature, the mechanical properties drop quickly and a large amount of plastic deformation. Due to high temperature (500°C) during braking may cause brake failure during the cause of premature wear on the pad, brake fluid evaporation and density changing property, and reduce the wheel bearing life. This causes a thermal stresses that generates surface cracks and wear and tear. For the reduction of the heat, there are many experiments taken place like changing the materials, increasing the number of vanes. Here the objective is to provide the more amount of air to the disc rotor by providing the duct on a car bumper. To design air duct to force cool the disc rotor (which forces the opposing air to disc brake) and to provide the solution by analyzing the disc's temperature reduction rate from results using analysis tool.