Numerical Simulation of Integrated Impingements Cooling Structure: Heat Removal at the Impingement and Pin Surfaces

Abstract

Turbine blade cooling is crucial in order to maintain its temperature below melting point. Integrated impingement cooling (IIC) is one method to achieve this. Present study deals with 3-dimensional transient numerical simulations of the IIC structure for high performance turbine. Cooling performance of four newly proposed IIC configurations along with two configurations by Funazaki and Hamidon (2008) have been investigated using k-ε turbulence model via commercial CFD package, Ansys Fluent. The simulations were validated against the experimental data of Funazaki and Hamidon (2008) and good agreement between the numerical results and the experimental data was observed. Pin configuration of STAG1 and STAG3 gave the highest heat transfer coefficient at the target plate and pin surfaces respectively. Evidently, conductive pin that acts as fin can improve the overall heat transfer of the IIC system studied.