The turbulence models review for aerodynamic, thermal and structural problems in jet engine turbines.

Abstract

Analysis of the aerodynamic, thermal and aeroelasticity (including vibration) processes in gas turbine stage is principal for a design and creating turbines and jet engine integrally. In this article was the review showed for the basic problems, which are solved by engineers for the gas turbines design and take a numerical analysis of flow. The special aspects was showed which appearance in the vanes and blades channels for turbojets turbine. The fundamental structure of the boundary layer and vortices on the low and high pressure faces of blade was demonstrated also. A target of this article is a review of current classification of the turbulence models and a review of best practices which include this turbulence models usage for the scientific and engineering problems. Authors describe the basic classification and the small specification with the application domain for each turbulence model (for aircraft). The general equation was demonstrated for URANS with a description of the Spalart – Allmaras, k-ε, k-ω, Menter’s SST, SST Gamma-ReTheta turbulence models. For LES, DES and DNS was showed description with the features only.The article contains the publications analysis with the turbulence models for three basic problems: aerodynamics, cooling problem (heat exchange) and structural problems (aeroelasticity, vibration resistance, stress limits, fatigue resistance). The turbulence models with high frequency of usage was presented in the current review moreover review contains the reasons of the models usage, the models hypothesizes, the changes of models (if it exists) and the solution accuracy. The solution accuracy was analyzed between different models of turbulence and between softwares for CFD. All arguments and conclusions was based on the different publications summary which was used for the review creating, and on data (numerical and graphical results) which was included in the researched CFD-articles. A little bit of the comparative analysis between CFD-softwares was created with the software’s user guides, the public reports and articles which includes the numerical researches in this problem. All results of the current review was presented in the general conclusions in end of article.