This paper presents a probabilistic analysis of the effect of erosion on the performance of compressor fan blades. A realistic parametric CAD model is developed to represent eroded blades. Design of Experiments (DOE) techniques are employed to generate a set of candidate points, which are combined with a parametric geometry modeling and grid generation routine to produce a hybrid mesh. A multigrid Reynolds-Averaged Navier Stokes (RANS) solver HYDRA with Spalart Allmaras turbulence model is used for Computational Fluid Dynamics (CFD) simulations. The data generated is used to create a surrogate model for efficient uncertainty propagation. This method is applied to a typical Rolls Royce compressor fan blade section. Monte Carlo Simulation, using the surrogate model, is executed for the probabilistic analysis of the compressor fan blade. Results show upto 5% increase in pressure loss for the eroded compressor fan blades.

Volume Subject Area:
Combined Cycles and Combustion Turbines
Topics:
Blades, Compressors, Computational fluid dynamics, Simulation, Computer-aided design, Erosion, Experimental design, Geometry, Mesh generation, Modeling, Pressure, Reynolds-averaged Navier–Stokes equations, Turbulence, Uncertainty
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Copyright © 2005
 by ASME
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