Optimization of Twisted Aero-Foil Blade Angle of a Structural Gas Turbine Assembly

摘要

The present work describes about the optimization of pre-twisted blade angle of a gas turbine. The minimization is done for the best blade structure due to low velocity, high drag force and frictional force. The previous research work brought a comprehensive knowledge about the pre-twisted blade where the angle is about 14.5°. The modeling of gas turbine structural assembly is done in CATIA-V5 and the prototype is stored in IGES format. The Assembly consists of shaft, blade(twisted) and hub(disc). The prototypes (pre-twisted blades) of different angles of 15°, 18°, 21° and 25° are subjected to Finite element analysis packages like ANSYS like 15.0 version and these prototypes are made of INCONEL 718 material which is a super-alloy. The ANSYS is operated for analyzing the static structure of the gas turbine integral unit to find the natural frequency at different conditions to avoid resonance of the gas turbine assembly unit. Similarly, an experimental analysis is done on the FFT instrument where DEWE software is used to find the natural frequency of the assembly in working condition. The comparisons has been made between experimental and the simulation for the static structural assembly.