Abstract
The problem of unsteady wake-airfoil interaction and wake transport is of importance in nearly all fluid mechanical devices involving rotating machinery. In this study, an inviscid airfoil-to-airfoil potential flow analysis is used to predict the transport of the wakes of upstream stators through both rotating compressor and turbine airfoil passages. In the analysis, the wakes are assumed to have an infinitesimal velocity defect and are represented by inviscid flow streamlines. The dependence of wake rotation on airfoil lift and the dependence of wake distortion on airfoil geometry are both shown. Flow visualization results obtained in both a large-scale compressor and a large-scale turbine show good comparison with the predictions, of the inviscid model.
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