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Probabilistic CFD Simulation of a High-Pressure Compressor Stage Taking Manufacturing Variability Into Account
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2010
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AeroacousticsEngineeringIndustrial EngineeringAerospace SimulationMechanical EngineeringCompressorSimulationComputer-aided DesignComputational MechanicsHpc StageUncertainty QuantificationComputer-aided EngineeringNumerical SimulationProbabilistic Cfd SimulationSystems EngineeringModeling And SimulationAircraft Design ProcessProcess OptimizationGeometric ModelingComputational Fluid DynamicsAerostructureAerospace EngineeringProcess Simulation ModelProcess ControlAerodynamicsAirfoil ModelProduction EngineeringAnalyzed Hpc StageHigh-pressure Compressor Stage
The present paper addresses a non-deterministic CFD simulation of a high-pressure compressor (HPC) stage. The investigation focuses on the determination of the influence of the manufacturing scatter of compressor blades on the aerodynamic performance of the analyzed HPC stage. A set of 150 blades was scanned using an optical 3D digitizer to obtain a three-dimensional point cloud representing the surface of the blades. Classical profile parameters were identified at several sections of constant spanwise coordinate. The radial stacking of these parameters forms a parameter vector that constructs the airfoil model of each scanned blade. Consequently these parameters were used to define the geometric variability of the entire measured blade set. A statistical analysis of the distribution of these parameters defines the input data of the probabilistic 3D CFD simulation. The Monte-Carlo method is used to identify the scatter of the performance values of the HPC stage and their sensitivity to the geometric variability of profile parameters.