Jafari, Rahim

Scholarly Output Search Results

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Citation - WoS: 25
Citation - Scopus: 38
Optimization and Thermal Analysis of Radial Ventilated Brake Disc To Enhance the Cooling Performance
(Elsevier, 2022) Jafari, Rahim; Akyuz, Recep
Ventilated brake discs are preferable to automobile application because of their higher heat dissipation ability than solid discs. The shape, geometry and number of the cooling fins are interested parameters to be investigated to improve the cooling performance of the discs. In the present study, the optimum design of the brake disc with radial vanes is investigated numerically using the Taguchi design of experiments with taking into account nine design parameters. Finite element method is employed to simulate the detailed airflow and temperature distribution in the disc considering adjoined components as pads, rim, tire and dust shield. It has been found that the ventilation gap width has the highest impact on the brake disc cooling. The cooling time of the disc decreases 21% as the ventilation gap increases from 8 mm to 14 mm. In addition, it reduces about 10% with the increment of the channel width between two adjacent vanes (inverse of vane numbers from 43 to 30) and the twist point from 225 mm to 266 mm. In a decreasing order of importance, fin angle, inner and outer diameters of fin, dust shield, bell link and disc material affect the cooling performance of the ventilated disc.
Citation - WoS: 11
Citation - Scopus: 10
Experimental and Numerical Study of Turbulent Flow and Thermal Behavior of Automotive Brake Disc Under Repetitive Braking
(Sage Publications Ltd, 2022) Jafari, Rahim; Tekin, Ozan; Akyuz, Recep; Gurer, Mehmet
The frictional brake system is the most safety critical equipment to decelerate or stop a vehicle. Thermal performance of the frictional region parts, disc and pads, necessitates to evaluate precisely in the design and test steps. In this study, a brake test setup was designed and fabricated with exactly the same braking components used in a common passenger vehicle as disc, pads, rim, tire, and dust shield to simulate the sequential braking. The local temperature on the disc and pads and the brake fluid pressure were measured. In addition, a three dimensional numerical model was designed to simulate the aerodynamics and thermal performance of the braking in detail. Finite element method was employed to simulate the frictional heat between the brake disc and the pads. The results showed that although the velocity of mainstream airflow reduces significantly into the rim, turbulent flow develops in the form of eddies of swirling airflow. Additionally, transient temperature distribution on the braking components was predicted. The cooling vanes in the brake disc have considerably enhanced the convection heat transfer. The amount of convective heat transfer on the inner radial vanes was more than 58% of the total amount of convective heat transfer.

Journal	Count
Case Studies in Thermal Engineering	1
Energy and Buildings	1
Experimental Thermal and Fluid Science	1
IICETA 2022 - 5th International Conference on Engineering Technology and its Applications -- 5th International Conference on Engineering Technology and its Applications, IICETA 2022 -- 31 May 2022 through 1 June 2022 -- Al-Najaf -- 183264	1
International Advanced Researches and Engineering Journal	1

Jafari, Rahim

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