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.
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e-mail: nejat@ut.ac.ir
e-mail: m.aslani@ut.ac.ir
e-mail: e.mirzakhalili@ut.ac.ir
e-mail: r.najian@ut.ac.ir
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December 2011
Design Innovations
Heat Transfer Enhancement in Ventilated Brake Disk Using Double Airfoil Vanes
A. Nejat,
A. Nejat
Assistant Professor
School of Mechanical Engineering, College of Engineering,
e-mail: nejat@ut.ac.ir
University of Tehran
, Tehran, Iran
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M. Aslani,
M. Aslani
School of Mechanical Engineering, College of Engineering,
e-mail: m.aslani@ut.ac.ir
University of Tehran
, Tehran, Iran
Search for other works by this author on:
E. Mirzakhalili,
E. Mirzakhalili
School of Mechanical Engineering, College of Engineering,
e-mail: e.mirzakhalili@ut.ac.ir
University of Tehran
, Tehran, Iran
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R. Najian Asl
R. Najian Asl
School of Mechanical Engineering, College of Engineering,
e-mail: r.najian@ut.ac.ir
University of Tehran
, Tehran, Iran
Search for other works by this author on:
A. Nejat
Assistant Professor
School of Mechanical Engineering, College of Engineering,
University of Tehran
, Tehran, Iran
e-mail: nejat@ut.ac.ir
M. Aslani
School of Mechanical Engineering, College of Engineering,
University of Tehran
, Tehran, Iran
e-mail: m.aslani@ut.ac.ir
E. Mirzakhalili
School of Mechanical Engineering, College of Engineering,
University of Tehran
, Tehran, Iran
e-mail: e.mirzakhalili@ut.ac.ir
R. Najian Asl
School of Mechanical Engineering, College of Engineering,
University of Tehran
, Tehran, Iran
e-mail: r.najian@ut.ac.ir
J. Thermal Sci. Eng. Appl. Dec 2011, 3(4): 045001 (10 pages)
Published Online: November 7, 2011
Article history
Received:
May 4, 2011
Revised:
August 15, 2011
Online:
November 7, 2011
Published:
November 7, 2011
Citation
Nejat, A., Aslani, M., Mirzakhalili, E., and Najian Asl, R. (November 7, 2011). "Heat Transfer Enhancement in Ventilated Brake Disk Using Double Airfoil Vanes." ASME. J. Thermal Sci. Eng. Appl. December 2011; 3(4): 045001. https://doi.org/10.1115/1.4004931
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