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Numerical Study of Brake Disc Cooling Accounting for Both Aerodynamic Drag Force and Cooling Efficiency
Technical Paper
2001-01-0948
ISSN: 0148-7191, e-ISSN: 2688-3627
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Sector:
Event:
SAE 2001 World Congress
Language:
English
Abstract
This paper reports how numerical simulation can be used as a tool to guide vehicle design with respect to brake cooling demands. Detailed simulations of different brake cooling concepts are compared with experimental results.
The paper consists of two parts. The first part places the emphasis on how to model the flow inside and around the brake disc. The boundary layer and the pumping effect is investigated for a ventilated single rotor. The numerical results will be compared to experimental results. In the second part, an engineering approach is applied in order to rank different technical solutions on a Volvo S80 vehicle in terms of brake cooling and aerodynamic drag.
The results from the free brake disc simulations indicate that the tangential velocity can be predicted with high accuracy, e.g. standard k-ε model with prism near wall cells typically within 4% of measured data. The pumping effect, i.e. the radial velocity was somewhat poorly predicted, although within 15% using standard k-ε model.
On the complete vehicle simulations, trends for both aerodynamic drag and brake cooling were captured for the cases considered. This implies that CFD is a useful tool in evaluating different brake cooling design concepts.
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Citation
Jerhamre, A. and Bergström, C., "Numerical Study of Brake Disc Cooling Accounting for Both Aerodynamic Drag Force and Cooling Efficiency," SAE Technical Paper 2001-01-0948, 2001, https://doi.org/10.4271/2001-01-0948.Also In
SAE 2001 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V110-6; Published: 2002-09-15
Number: V110-6; Published: 2002-09-15
References
- Dhaubhadel M.N. “Review: CFD Applications in the Automotive Industry” Journal of Fluid Engineering 118 647 653 December 1996
- Daudi A.R. “72 Curved Fins and Air Director Idea Increases Airflow through Brake Rotors” SAE Technical Paper 1999-01-0140 1999
- Fluent 5 User's Guide
- Hucho W.H. “Aerodynamics of Road Vehicles” 4th SAE 0-7680-0029-7 1998
- Hunter J.E. Catier S.S. Temple D.J. Mason R.C. “Brake Fluid Vaporization as a Contribution Factor in Motor Vehicle Collisions SAE Technical Paper 973923 1997
- Karl Kardos Senior Brake Specialist Volvo Car Corporation Private communication 2000
- Lee Kwangjin “Numerical Prediction of Brake Fluid Temperature Rise During Braking and Heat Soaking” SAE Technical Paper 1999-01-0483 1999
- Makowski F.T. Sung-Eun Kim “Advances in External-Aero Simulations of Ground Vehicles Using the Steady RANS Equations” SAE Technical Paper 2000-01-0484,2000
- Nilsson, L.-U. Berndtsson “The New Volvo Multipurpose Automotive Wind Tunnel”
- Owen J.M. Rogers R.H. “Flow and Heat Transfer in Rotating-Disc Systems” 0-86380-090-4 Research Studies Press Ltd. 1989
- Sebben S. “Numerical Flow Simulation of a Detailed Car Underbody” SAE Technical Paper 2001-01B-93 2001
- Shen Z.F. Mukutmoni D. Thorington K Whaite J. “Computational Flow Analysis of Brake Cooling” SAE Technical Paper 971039 1997
- Skea A.F. Bullen P.R. Qiao J. “CFD Simulations and Experimental Measurements of the Flow Over a Rotating Wheel in a Wheel arch” SAE Technical Paper 2000-01-0487 2000
- StarCD User Manual
- Zhang S.J. “A High Aerodynamic Performance Brake Rotor Design Method for Improved Brake Cooling” SAE Technical Paper 973016 1997