Numerical Inspection of Location, Density Ratio, and Turbulent Kinetic Energy of Vortex Generator in Gas Turbine Blade Film Cooling Application

Abstract

By using a vortex generator, the current numerical study suggests reducing the consequences of a counter-rotating vortex pair. For this study, the delta winglet pair in the common-flow-down configuration is recommended. The investigation of a suitable turbulence model has been studied. The impact of vortex generator placement on the parameters of film cooling efficiency has been studied using numerical simulation. The vortex generator is located before the film hole or upstream, after the film cooling hole or downstream, and both before and after the film cooling hole. The outcome suggests that a vortex generator placed upstream of the circular film cooling hole will function more effectively. The film cooling hole dimension and free stream velocity are used to maintain a Reynolds number of 17000. Additionally, the effects of altering the density ratio (DR), turbulent kinetic energy (TKE), and secondary flow velocity (uj) on cooling effectiveness have been studied. The outcome demonstrates that the decrease in cooling efficiency is caused by an increase in uj and T.K.E. A baseline case is used to compare the outcomes. It has been noted that numerical analysis using commercial code for fluent and the k-omega shear stress transport turbulence model performs better.