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Brake Rotor Temperature Nathan Bloomfield Josh Carroll Brian Winder
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Objective Analyze brake rotor temperature for a Formula SAE car. Analyze brake rotor temperature for a Formula SAE car. http://www.ntrc.gov/pdfs/showcase020506/DaleHartsock.pdf http://www.comsol.com/showroom/gallery/102.php#
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Assumptions Even heat transfer side to side Even heat transfer side to side Kinetic energy of the wheels is not significant Kinetic energy of the wheels is not significant All of the kinetic energy goes into the brake rotors as heat All of the kinetic energy goes into the brake rotors as heat There is nothing else slowing the car down There is nothing else slowing the car down
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Method Assume 1.5 g Assume 1.5 g constant acceleration and deceleration to simulate race conditions. Five cycles from Five cycles from 0 to 37 m/s (83 mph) In Excel, we found: In Excel, we found: Kinetic energy Kinetic energy Initial temperature guess Initial temperature guess q"rad, q"conv and total q” q"rad, q"conv and total q” Final temperature Final temperature All of these change throughout the cycle
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Summary of Results
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Conclusions and Recommendations Use different size rotors Use different size rotors Rotor width can be changed to increase or decrease the overall temperature Rotor width can be changed to increase or decrease the overall temperature
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Questions?
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