Three Dimensional Stress-Strain Analysis of a Typical Gas Turbine Blade using Finite Element Method

Energy is extracted in gas turbine systems by expanding hot gases through several passages between fixed stator and moving rotary blades. These blades must have maximum reliability, durability, yield strength and minimum material cost. In this study, High Speed Steel alloys (HSS) and Titanium alloys (Ti-6Al-2Sn.) have been used in the 3D axial turbine blade. The turbine blade has been modelled using Solid works software using finite element analysis to calculate stress, strain, deflection and many other parameters based on a numerical computational method using ANSYS software. An attempt has been made to compute the equivalent of stress, strain and displacement of a typical rotary blade of the gas turbine system and to compare the results obtained with the available data. Attention has been focused on the stress-strain field analysis on the upper and lower surfaces of the blade, and on the turbine blade chord line. The results show the complication of the stress-strain field over turbine blade. From computational results, the use of High-Speed Steel alloys (HSS) in these applications under such cases and assumptions is more preferable to increase the reliability, durability and availability of turbine blades.