Parametric Study of Film Cooling and Implementation on Blade of Turbin Axial One Stage

• Main Author: Arifin Rajagukguk, Rial
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/35422
• Institution: Institut Teknologi Bandung

One technique that be able increase turbine power output is to raise the temperature inlet turbine. However, the increase of temperature inlet turbine causes the higher possibility of material failures of the turbine. The addition of cooling system is needed to overcome this problem. One type of the cooling system that may provide higher temperature reduction on the turbin surfaces is a film cooling. Therefore, a parametric study of film cooling is required to determine parameters that influece to heat load reduction and turbine power. In parametric study, the optimum design film cooling is acquired using a value in term of film cooling effectiveness. A parametric study is conducted with simulating the film cooling on various parameters including kurvatur surface, cooling exit angle, and blowing ratio. For curvature surface, the turbine surface may be composed from simple surface such as flat plate and kurvatur wth certain radius. Computational fluid dynamic method including geometry creation, mesh generation, solver and post processing is used to simulate interations beetwen cooliant air and hot air. Simulation of cooling film with exit coolant angle 30 degree and blowing ratio 0.2 shows the optimum design. Then this result is implemented on one stage stator and rotor turbine. As a result, the addition of the film cooling on turbine provide significant temperature reduction on the surface blade turbine with less turbine power output.