Heat transfer in rotating trailing edge channels

The heat transfer characteristics of static and rotating turbine blade trailing edge channels with staggered-ribs and pin-fins was experimentally. The model was a wedge shaped channel. Ribs were staggered on trailing and leading walls (p/e=7), pins of two different sizes were placed in the pin-fin region. Reynolds number ranged from 6 100 to 33 000, while the Rotation number was up to 0.6 in the experiments. The results indicates that the difference of heat transfer decreases along the radial direction. Heat transfer in rotating condition increases on the trailing side, while on the leading side it decreases overall. Heat transfer near the blade tip increases on both trailing and leading walls. The scale of transition section in pin-fin region decreases under rotating condition, the max Nusselt number tends to appear in the low radius area.