Water is the working medium in a thermal power plant. The requisites for high pressure steam are strong and bulky components. Thus in place of steel, expensive alloys made from nickel or cobalt are used. In the present Mechanical Project Gas Turbine Blades Rotor Blade Using Nickel Based Super Alloy an attempt has been made to understand the turbine blade mechanism through the finite element modeling aiming to determine stresses and approximate the blade fatigue life.
When the power plant is in a continuous mode of operation, the turbine blades can be affected by high fatigue failures which are essentially because of resonance which occurs at blade critical speed dry startup and shut down condition. The material of the blade used here is Nickel based super alloy and by continuous operation of this blade, the power capacity of the plant increases.
In this project, the rotor blade is analyzed to determine mechanical stresses and forces i.e. tangential, axial, are determined by constructing velocity triangles at the entry and exit points of the blade. The blades in the turbine which is moving are for conservation of the kinetic energy of the gas/steam into mechanical work. This is transmitted to the shaft on which blades are mounted.
The blades are attached are drum/disc of turbine short blades and possesses minute centrifugal forces and are usually made with T-shaped tangs attached to the discs. If there is same width between the blade and tangs then proper blade passage is obtained.
Thus by successful implementation of this project, the structural, life estimation and modal analysis is executed. At the root of the turbine blade, maximum stress and strain is observed. Hence it is conclude that by the analysis blade used is safe.
Download Gas Turbine Blades Rotor Blade Using Nickel Based Super Alloy Mechanical Project Report.