FE Modelling of Investment Casting of a High Pressure Turbine Blade Under Directional Cooling 

S.M. Afazov[1] , A.A. Becker and T.H. Hyde

  Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham NG7 2RD, UK.
[1] Corresponding author; Email: shukri.afazov@nottingham.ac.uk
ABSTRACT
This paper presents finite element (FE) simulation of an investment casting of a high- pressure turbine blade (HPTB) under directional cooling. The main focus of the simulation is to highlight the difficulties of modelling the casting process and the prediction of the temperature field and residual stresses. The temperature field and the residual stresses are predicted for two withdrawal velocities. The simulation is performed in a sequential thermo-mechanical FE analysis (FEA). First, a thermal analysis is performed where the heat transfer is achieved by cavity radiation and view factor calculations. Mechanical analysis is then performed based on the temperature history from the thermal analysis.
KEYWORDS
FEA, investment casting, directional cooling, residual stresses, high-pressure turbine blade


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