Application of an Algebraic Anisotropic Turbulence Model in Numerical Solution of Triple Jet Film Cooling

The best way to increase turbine efficiency is increasing the temperature of the incoming air. On the other hand, film cooling is the most efficient tool. In this work triple jet film cooling has been numerically investigated. Cross sections of all jets were rectangular and were inclined normally into hot cross-flow. As far as turbulence modeling, k-ω/SST along with an algebraic non-isotropic turbulence model, as its modification, has been used. In addition, staggered grid and finite volume method with SIMPLE algorithm were implemented. The turbulence model used was shown to be able to predict mean quantities relatively close. Also, it had a much better convergence rate compared with standard k-ω SST model. On the other hand, this model did not predict some of the turbulent quantities (such as turbulent kinetic energy) close enough. Finally, it seems to work better in single-jet film cooling, compared to a triple jet one.