The required aerodynamic simulation fidelity to usefully support a gas turbine Digital Twin for manufacturing

With the imminent digitalisation of manufacturing processes gas turbine components, a large volume geometric data as-manufactured parts is being generated. This can be used in aerodynamic simulations to predict component performance. Both cost and accuracy these increase with their fidelity. To efficiently exploit Digital Twin technology, one must therefore understand how realistic need give useful performance predictions. paper considers this issue for sample scrapped high-pressure rotor blades from civil aero engine. The measured was build models varying degrees realism, ranging quasi-three-dimensional blade sections an Euler solver three-dimensional, multi-passage multi-stage Reynolds-Averaged-Navier-Stokes models. flow near tip shrouded sensitive variability switch between two quasi-stable horseshoe vortex modes. In general, capacity exit angle adequately predicted by single-passage calculations: averaging calculations gives good prediction behaviour. For efficiency stage loading, approach less accurate as behaviour requires