Comparative CFD Analysis of Forced Convection Cooling of a Gas Turbine Blade of Different Materials with Several Staggered holes

For gas turbines, the energy of the fluid can be expressed in terms of the enthalpy change, which is almost directly related to the turbine temperature. The performance of the gas turbine can be improved by continuously improving the temperature and compression ratio. In this article, for the cooling of blades, making several radial holes has been suggested to pass high cooling air at high velocity along the span of blade. CFD analysis has been used to analyse the effect of heat transfer of a gas turbine with six different models which has 6,7,8,9,10,11,12 inline one row of holes and are further compared with each other. Three different materials has been considered and heat transfer in each material has been examined and then compared. After evaluation it has been concluded that the blade with 12 staggered holes in Titanium had the minimum temperature rise. All other performances were also best in Titanium comparative to other two materials.