Modeling and numerical analysis of a turbine stator vane performance from the second law of thermodynamics view point

The proper design of the stator turbine supercharger is of great help in increasing its performance and overall engine efficiency. In this research, with the help of FLUENT software, the local entropy generation and rate of exergy destruction of the turbine stator vane has been investigated. In the analysis, local entropy generation is divided into two sections: viscous entropy generation and thermal entropy generation, and the governing equations are defined with the help of UDF within the FLUENT software. After calculating the local entropy generation and determining the value of irreversibility quantities, According to the Gouy-Stodola equation, the amount of exergy destruction is calculated by numerical method. The results show that the two models of the Spalart Allmaras and k-ω(SST) have performed the best prediction wake of the vane. The amount of viscous entropy generation and thermal entropy generation is 69% and 31%, respectively. The values of the local entropy production calculated with the results of a stator turbine vane of authentic paper are validated with acceptable adaptation in it. The calculated exergy destruction is 281 kW, located in the range of modern gas turbines for a high-pressure turbine stage.