The study of flow disturbance models to simulate the flow passing through the chain of vanes

In this research, the performance of different turbulent flow models in the simulation of fluid flow passing through the chain of stator vanes of a turbine has been investigated. In this research, the Reynolds number is considered equal to 23.2×105. In the Navier-Stokes equations, discretization is done using the finite volume method on the computational grid, and Simple algorithm is used to couple the velocity and pressure equations. Different turbulence models include two-equation models, Realizable k-ε, RNG k-ε, SST k-ω and the five-equation model of the Reynolds stress method (RSM). The performance of various turbulent flow models has been investigated by calculating the pressure coefficient obtained from the present work in comparison with the laboratory results in ten different areas of the third blade of the chain. The results show that the accuracy of the aforementioned turbulence models in estimating the static pressure coefficient in different regions of the aforementioned vane chain are slightly different, but the five-equation Reynolds stress model has a better match with the experimental results.