Coupled Heat Transfer Simulation of a High-pressure Turbine Nozzle Guide Vane

The investigation is intended to verify a coupled solver developed for turbines to illustrate how transition exerts effects on the predicted thermal loads. The solver couples the N-S solver named HIT-3D, with a thermal conduction module using the finite difference method. Three operating conditions of the NASA-MarkII vane are selected to be the cases for tests. The models used in the simulations include Baldwin-Lomax (B-L) algebraic model, q-ωlow-Re model and B-L & Abu-Ghannam and Shaw (AGS) model. The predicted profile pressure distributions obtained in all the simulations agree well with the measured ones. The predicted profile temperatures acquired with different models in the turbulent zones and those with the B-L & AGS model in the laminar and transition zones accord with the measured ones. Therefore, in order to accurately predict the thermal loads on the turbine vane, it is necessary to take transition into account in the simulations.