Numerical study of gas turbine nozzle guide vane external heat transfer and showerhead film cooling effectiveness by means of hybrid RANS-LES CFD modelling

An accurate estimation of gas turbine nozzle guide vane metal temperature locally on its surface is crucial for predicting vane lifetime. The stagnation region at the vane leading edge is, typically, exposed to the highest thermal load, thus, the showerhead configuration of film cooling is often applied on the leading edge. Widely used lean-...