# CFD modeling and computation of convective heat coefficient transfer of automotive disc brake rotors

### Resumen (en_US)

Braking system is one of the important control systems of an automotive. For many years, the disc brakes have been used in automobiles for safe retardation of the vehicles. During braking enormous amount of heat will be generated and for effective braking sufficient heat dissipation is essential. The thermal performance of disc brake depends upon the characteristics of the airflow around the brake rotor and hence the aerodynamics is an important in the region of brake components. A CFD analysis is carried out on the braking system as a case study to make out the behaviour of airflow distribution around the disc brake components using ANSYS CFX software. We are interested in the determination of the heat transfer coefficient (HTC) on each surface of a ventilated disc rotor varying with time in a transient state using CFD analysis, and then imported the surface film condition data into a corresponding FEM model for disc temperature analysis.

### Resumen (es_ES)

Braking system is one of the basic organs to control a car. For many years, the disc brakes have been used in automobiles for safe retardation of the vehicles. During braking, enormous amount of heat will be generated, and for effective braking, sufficient heat dissipation is essential. The specific air flow surrounding the brake rotor depends on the thermal performance of the disc brake and hence, the aerodynamics is an important in the region of brake components. A CFD analysis is carried out on the braking system as the study of this case, to make out the behaviour of air flow distribution around the disc brake components using ANSYS CFX software. The main object of this work is to calculate the heat transfer coefficient (h) of the full and ventilated brake discs as a function of time using the CDF analysis which will be used later in the transient thermal analysis of the disc in ANSYS Workbench 11.0.

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### Referencias

Belhocine, A., (2016), FE prediction of thermal performance and stresses in an automotive disc brake system. International Journal of Advanced Manufactoring Technology,Volume , Number , pp.1–16, Springer.

Belhocine, A. and Wan Omar, W.Z., (2016), Three-dimensional finite element modeling and analysis of the mechanical behavior of dry contact slipping between the disc and the brake pads, International Journal of Advanced Manufactoring Technology, Volume , Number , pp.1–17, Springer.

Cruceanu, C., (2007) ,Frâne pentru vehicle feroviare (Brakes for railway vehicles), Ed. MATRIXROM, Bucureşti, ISBN 978-973-755-200-6, 388 pag.

Dufrénoy, P., (2004), Two-/three-dimensional hybrid model of the thermomechanical behaviour of disc brakes‖, J Rail Rapid Transit Part F 218, pp 17–30.

Gotowicki, P.F., Vinzenco, N., Mariotti, G.V., (2005), Numerical and experimental analysis of a pegs- wing ventilated disk brake rotor with pads and cylinders, 10 th EAEC Eur.Automot. Cong – Paper EAEC05YUAS04– P 5.

Lee, S. and Yeo, T., (2000), Temperature and coning analysis of brake rotor using an axisymmetric finite element technique, Proc. 4th Korea-Russia Int. Symp. On Science & Technology, 3, 17-22.

Limpert, R., (1999),Brake Design and Safety, 2nd Edition, Warrendale,Pennsylvania: Society of Automotive Engineering Inc., pp. 137-144.

Ouyang, H., Abu Bakar, A.R., Li, L., (2009), A combined analysis of heat conduction, contact pressure and transient vibration of a disc brake, Intnational Journal of Vehicle Design, 51(1/2), 190-206.

Reimpel, J., (1998), Braking technology,Vogel Verlag, Würzburg.

Söderberg, A. and Andersson, S.,(2009) ,Simulation of wear and contact pressure distribution at the pad to-rotor interface in the disc brake using general purpose finite element analysis software, Wear 267,12(1), pp. 2243–2251.

Zhang, L., Yang, Q., Weichert, D., Tan, N., (2009), Simulation and Analysis of Thermal Fatigue Based on Imperfection Model of Brake Discs, Beijing Jiaotong University, PAMM • Proc. Appl. Math. Mech. 9, 533 – 534

*Revista Científica*,

*2*(29), 116-128. https://doi.org/10.14483/udistrital.jour.RC.2017.29.a1

Derechos de autor 2017 Revista Científica

Esta obra está bajo licencia internacional Creative Commons Reconocimiento 4.0.