To strengthen the convective heat transfer ability of the limited cooling air in the cabin, temperature field homogenization (TFH) in the core flow region of the engine block area was achieved. The TFH optimization model helped minimize the temperature gradient in the core flow region and maximize it at the heat transfer boundary, and the optimum vector field and flow path were obtained. More comprehensive changes to the structural design were made according to the TFH.

This paper examines a code-to-code verification between two thermal models. One used a non-commercial code; the other a commercial. A point heat source was applied to one end of a cylindrical geometry. Melting and re-solidfying of a 316 L stainless steel alloy was considered. Temperature dependent material properties and latent heat were included. Mesh independency was achieved. Positive agreement of thermal histories, temperature profiles, melt pool depth and maximum temperature along the rod.

A dynamic thermal-mechanical model of the spindle-bearing system is proposed to investigate the transient thermal characteristics. A spindle-bearing system with adjustable and measurable preload is designed and constructed. Validated by the experiments, thermal feedbacks on boundary conditions and thermal contact conductance are non-ignorable for the accurate simulation. The proposed model could also be generalized in other mechanical systems to improve the prediction accuracy.