Application Of Flow Simulation In Gas Turbines

  1. Introduction to Gas Turbines: The gas turbine is a prime mover which develops power by burning of fuel. The gas turbines are axial flow machines which convert the heat from combusted fuel into the trust power or shaft power. The hot gases undergo momentum changes when they flow through the passages formed by the stationery and rotating blades. A jet of hot gases and air mixture is made to flow over rings of moving blades mounted on a shaft and in doing so the velocity of the jet decreases. Its kinetic energy is absorbed by the rings of blades imparting rotary motion to the shaft. A larger part of the power developed by the turbine rotor is consumed for driving a compressor which supplies air under pressure to a combustion chamber, while the remaining power is utilized for doing the external work. The basic principle on which a gas turbine works is similar to internal combustion reciprocating engine. In both the cases, air is made to enter the prime mover which compresses, air ...