An entropic minimization technique for turbine blade profiles

The process of how the laminar boundary layer edge velocity distribution on the suction surface of non-film cooled turbine blades may be optimized to generate the least entropy was demonstrated. Thus, the optimization technique was based on a semi-empirical entropy prediction method, where the prediction of the entropy generation rate was based entirely on the boundary layer edge velocity distribution for incompressible boundary layers. The aim of the entropy minimization analysis in the laminar region was to keep the work output constant, ensure that the flow does not separate and to blend the improved boundary layer edge velocity distribution with the baseline one outside the region of optimization.