Conjugate Heat Transfer Analysis in the Trailing Region of a Gas Turbine Vane

Abstract

Conjugate heat transfer calculations are performed on cambered converged channels with and without pin fins, simulating the trailing region internal cooling passages of a gas turbine vane. Simulations are carried out for an engine representative Reynolds number of 20,000, based on the hydraulic diameter at the entry of coolant channel. The effect of conjugation is brought out by varying the solid to fluid thermal conductivity ratio from 7 to 16,016. The interaction between the complex flow pattern and conjugate heat transfer is highlighted. The local values of pressure, wall and fluid temperature, area-averaged values of friction factor, and Nusselt number of the smooth and pinned channels are compared.