Abstract:
In this study, we investigated the change of the heat transfer coefficient on the surface with the TLC method on a blade model with three-pass channel. It is seen that the Reynolds number effects, speed distribution in the channel and heat transfer coefficient distribution differ as a result of the geometry of the parts' transition. In the experimental studies, comparison of circular- and square-holed transition parts of 20 m(3) h(-1) and 30 m(3) h(-1) flow experiments shows that although the channel with three passes has been found to have a more homogenous heat relay, the square hole used for the part of the transition with three-pass channels has access to the higher heat occurring compared to the circular-holed transition piece. In the 40 m(3) h(-1) and 50 m(3) h(-1) value experiments, the circular-holed transition piece used had the higher heat transfer coefficient in the channel and a more homogeneous distribution of the heat transfer was observed.