Numerical Investigation of the blade Installation Angle Impact on the Performance of a Two-Stage Axial Gas Turbine

In the present work, the effects of the blade installation angle of a two-stage axial turbine on its performance are investigated  numerically. The geometrical specifications of the General Electric MS5001 gas turbine are selected for the study. First, the turbine geometry is created and gridded, and the final model is generated by the combination of the gridded blades. In order to calculate the effect of the wall on the turbulent flow, the Shear Stress Transport (SST) turbulence model is used. First, the acquired results from the studied turbine are compared with the available data from the power plant which showed a good agreement. Then, to investigate the effects of the blade angle on the performance of the turbine, the angle of each row from the four rows of turbine blades is changed in each step, and the obtained results are compared with the results of the turbine original model. Increasing the installation angle of stator blades in the second row and decreasing the installation angle of rotor blades in the second row lead to increasing the produces power and efficiency of the turbine. The acquired results show that the produced power is increased by 4% and the turbine efficiency is increased by 0.87% in the best-optimized arrangement of blades.