Experimental disc heat flux identification on a reduced scale braking system using the inverse heat conduction method

This work focuses on the local heat fluxes on a disc during braking conditions. The generated heat and the temperature field are identified using an inverse heat conduction method coupled to temperature measurements inside the disc. Function specification is used to estimate the boundary conditions in the model without any prior information on the flux intensity and the evolution regarding the time and the position on the sliding surface. Disc heat flux identifications are performed for different braking conditions (sliding speed and normal pressure) on a High-Speed Tribometer. The temperature values are obtained using a telemetry system that allows inductive data transfer. The influence of the braking conditions on the heat repartition and the surface temperature is discussed. ► The disc local heat fluxes are calculated in braking conditions. ► Experimental temperatures are measured inside the disc using a telemetry device. ► A 2D inverse method allows for the identification of heat fluxes from measurements. ► A pressure influence on the heat repartition is highlighted.