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Understanding and improving the convective cooling of brake discs with radial vanes Introuction • Convective heat dissipation makes the greatest contribution to brake disc cooling in most road vehicle driving conditions • this mode of heat dissipation is further exploited by creating internal passages within the disc Introuction • The approach was to use a simple method – a small vane placed in the middle of the existing channels – and, by creating a ‘venturi effect’ within the channel, to improve airspeed distribution and increase convective heat transfer. Introuction • Airflow and convective cooling from this disc were studied theoretically using computational fluid dynamics (CFD) simulations • Although this much simplifies the real brake working environment • Theoretical and experimental studies can be conducted under identical conditions and easily repeated. Introuction • Baseline brake disc CFD disc model • Brake disc CFD model CFD results for the baseline disc design • Baseline disc: relative velocity at 800 r/min CFD results for the baseline disc • Baseline disc vanes: convective heat transfer coefficients at 800 r/min Experimental set-up • Brake disc cooling test set-up • Validation of CFD modelling • Baseline disc: radial near-wall airspeeds in the channel at 800 r/min