Local Heat Transfer of a Disk Rotating in a Casing, With a Transitional Boundary Layer.

Results of an experimental investigation of the local heat transfer around a disk rotating in a casing, when there is no through flow of a medium through the gap between the disk and the casing, are considered. A description is given of an experimental plant and of the method of staging and processing tests in conditions of non-steady thermal conditions. A similarity equation is proposed for the local heat transfer around a disk in the presence of a transitional layer. The results obtained are compared with those available in literature.