The aim of this research is to enhance the heat transfer of ventilated brake disks using modified vanes. The investigated braking scenario is a hold braking deceleration during a downhill drive. A simple model for computing the steady state vane’s temperature is presented. The heat transfer coefficient (HTC) of the brake disk’s ventilation is estimated by means of a verified CFD computation. A novel design for the vanes is proposed using an airfoil profile to improve the air pumping efficiency increasing the flow velocity between vanes. For further improving the ventilating capacity, a secondary airfoil vane is introduced to the primary airfoil vane design. The computed results estimate 17% to 29% improvement in HTC number for new vane design at different disk’s angular velocities.

Issue Section:
Design Innovation
Keywords:
aerodynamics, angular velocity, blades, brakes, braking, computational fluid dynamics, design engineering, discs (structures), heat transfer, valves, ventilation, disk brake ventilating, airfoil, thermal efficiency, CFD, HTC
Topics:
Airfoils, Brakes, Computational fluid dynamics, Design, Disks, Heat transfer, Braking, Temperature, Flow (Dynamics), Ventilation

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Copyright © 2011
 by American Society of Mechanical Engineers
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