Numerical investigations on the unsteady leakage flow and heat transfer characteristics of the turbine blade squealer tip

The unsteady leakage flow and heat transfer characteristics of the turbine blade squealer tip was numerically investigated using three-dimensional Unsteady Reynolds-Averaged Naiver-Stokes (URANS) standard k-ω turbulence model. numerical simulated coefficients were well agreement with experimental data. accuracy method validated. steady coefficient without film cooling conducted. design at three different blow ratios investigated. obtained results show that corner vortex scraping near pressure side shows periodic fluctuation along separation line under function difference between suction tip, as upstream vane wake flow. This behavior in high tip. camber can effectively reduce thermal load by comparison to case. time-averaged 9.0%, 12.4% 13.2% blowing ratio .0.5, 1.0 1.5 respective. present work provide reference for