A two-dimensional analytical solution for the temperature rise in a sliding contact is proposed. The model is based on a moving slab subjected to a surface frictional heat source featured, in principle, by any suitable intensity distribution. The slab is cooled on both surfaces by different radiative-convective heat transfer to an ambient at uniform temperature. Thermal boundary conditions are for wall heat flux linearly depending on the wall temperature and allow to recover both the Dirichlet and Neumann boundary conditions as special cases. The dimensionless temperature field in the slab has been solved analytically in closed form by the method variation of parameters in terms of infinite series. The effects of the slab finite thickness and of different thermal boundary conditions are in particular examined and presented for different values of the dimensionless key parameters involved in the problem description. The analytical solution is compared to a preliminary experimental testing carried on a system featured by a moving lamp acting as heat source to simulate sliding contact. The resulting thermal field is detected through infrared-thermography which easily allows a suitable data reduction in order to compare the experimental data with the corresponding analytical predictions. The proposed technique seems to be promising wishing to enhance the control of overheating in sliding contacts.
AN ANALYTICAL SOLUTION AND AN EXPERIMENTAL PROCEDURE FOR THERMAL FIELD AT THE INTERFACE OF DRY SLIDING SURFACES
CUCCURULLO, Gennaro;D'AGOSTINO, Vincenzo;DI GIUDA, ROBERTA;SENATORE, ADOLFO
2011-01-01
Abstract
A two-dimensional analytical solution for the temperature rise in a sliding contact is proposed. The model is based on a moving slab subjected to a surface frictional heat source featured, in principle, by any suitable intensity distribution. The slab is cooled on both surfaces by different radiative-convective heat transfer to an ambient at uniform temperature. Thermal boundary conditions are for wall heat flux linearly depending on the wall temperature and allow to recover both the Dirichlet and Neumann boundary conditions as special cases. The dimensionless temperature field in the slab has been solved analytically in closed form by the method variation of parameters in terms of infinite series. The effects of the slab finite thickness and of different thermal boundary conditions are in particular examined and presented for different values of the dimensionless key parameters involved in the problem description. The analytical solution is compared to a preliminary experimental testing carried on a system featured by a moving lamp acting as heat source to simulate sliding contact. The resulting thermal field is detected through infrared-thermography which easily allows a suitable data reduction in order to compare the experimental data with the corresponding analytical predictions. The proposed technique seems to be promising wishing to enhance the control of overheating in sliding contacts.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
