Numerical analysis on the shape of ribs for enhancing heat transfer in matrix channel

This study aimed to improve the thermal performance of matrix channels used for the internal cooling of gas turbine blades. Two types of ribs were installed on the leading and trailing surfaces in the channel with a constant height. Numerical analyses were carried out for the vertical and inclined ribs, and the Reynolds number was fixed at 10,500. In the case of vertical rib, the swirl flow was not enhanced, and the flow was disturbed. As a result, the pressure drop increased considerably, and the thermal performance decreased. However, in the case of the inclined rib, the swirl flow was strengthened by the secondary flow. As a result, a hight heat transfer distribution was observed at the back of the rib. Futhermore, the thermal performance improved significantly compared to that of the matrix channel without a rib.