Probabilistic CFD simulation of a high-pressure compressor stage taking manufacturing variability into account
Alexander Lange, Matthias Voigt, Konrad Vogeler, Henner Schrapp, Erik Johann, Volker Gümmer
abstract:
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 manufactured 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 on 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 express 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 noisy profile parameters.
reference:
Alexander Lange, Matthias Voigt, Konrad Vogeler, Henner Schrapp, Erik Johann, Volker Gümmer
"Probabilistic CFD simulation of a high-pressure compressor stage taking manufacturing variability into account"
ASME Turbo Expo, GT2010-22484, Glasgow, 2010.