A  new  transport  equation  for  the  intermittency factor was proposed  to predict separated and transitional boundary layers under low-pressure turbine airfoil conditions. The intermittent behavior  of  the  transitional flows is taken into account and incorporated into computations by modifying the eddy viscosity, with  the  intermittency  factor.  Turbulent quantities   are   predicted  by  using  Menter's  two-equation turbulence  model  (SST).  The intermittency factor is obtained from  a  transport equation model, which not only can reproduce the   experimentally   observed  streamwise  variation  of  the intermittency in the transition zone, but also can provide a realistic cross-stream variation of the intermittency profile.The intermittency model had been previously validated against T3- series experiments and low pressure turbine experiments with success.

The intermittency model is used to predict a recent separated and transitional boundary layer experiment under low pressure turbine airfoil conditions. The experiment provides detailed measurements of velocity, turbulent kinetic energy and intermittency profiles for a number of Reynolds numbers and freestream turbulent intensity conditions and is suitable for validation purposes. Detailed comparisons of computational results with experimental data are presented and good agreements between the experiments and predictions were obtained.