Abstract
The further improvement of gas turbines requires the development of cooling technique with reduction of cooling air mass flow rate as well as the increase of the turbine inlet temperature. The theoretically most effective air cooling method is the transpiration cooling, which will be expected to reduce the cooling air mass flow rate. In the present study, the two-dimensional flow within the turbine cascade made by the porous media was analyzed numerically by the commercial CFD code. The calculations were performed in order to examine the influence of parameters on the cooling efficiency, such as the porosity, the mean diameter of particles of the porous media and the blowing ratio. The results revealed that the cooling efficiency was strongly influenced by these parameters.
