Effect of Heat Transfer Coefficient on Cooling of Gas Turbine Blades
Keywords:
Heat Transfer Coefficient, Thermal Conductivity, CAD, CAE and CFD Tools.Abstract
Modern gas turbine blades are optimized and designed to work on elevated temperature. Design of blade is carried out with maximum accuracy and aerodynamic shapes. The shape and design of blade will give him an ability to withstand at high temperature. There are different factors which affect the blade performance with respect to the heat and temperature. It is well known that the gas turbine blade working environment and the temperature is very high. It must possess an ability to work efficiently on this temperature. For that purpose, the effective cooling technique must be implemented in the gas turbines. There are several cooling techniques are used is gas turbines. Such as Convection, Film, Transpiration Cooling, Cooling Effusion, Pin Fin cooling Convection, Film, Transpiration Cooling, Cooling Effusion, Pin Fin cooling etc. Heat Transfer coefficient is the important property of gas turbine blade material, as it affects the thermal performance. To work efficiently, heat must transfer rapidly from the blade. The value of Heat transfer coefficient will decide the heat transfer rate. It is also known that the heat transfer coefficient can affect the thermal conductivity and cooling capacity of material. In this paper the effect of heat transfer coefficient on the cooling capacity is checked out by means of CAD, CAE and CFD tools. CATIA V5R19 and ANSYS 14.5 software are used to carry results. On the basis of results generated further conclusions are drawn.
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