Numerical Investigation of Jet Impingement on a Gas Turbine Blade Leading Edge using CFD

In this paper, Computational Fluid Dynamics (CFD) of air jet impingement flow characteristics and heat transfer parameters are investigated over a leading edge curvature of a turbine blade. This simulation was performed using RANS method with k-�µ model. Analysis is done to study the flow characteristics in impinging process for different impinging height to diameter (h/B), various Reynolds number (Re) for their respective exit velocity of jet (Ue) and for different hydraulic diameter of 2B. The distribution of temperature and temperature fluctuations on the concave surface has been measured. Local Nusselt number has been measured over a curved surface for different hydraulic diameters. Change of jet Reynolds number, distance between the nozzle and target surface and the distance from the stagnation point in the peripheral direction of the curved surface have been considered. Prediction are compared and validation with experiment data. The simulated heat transfer data can be used in many practical experiments.