Unsteady Flow Calculation in Cascades

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Abstract
This paper describes a two dimensional unsteady calculation method which applies to the flow computation in two blade-rows having different angular speeds. The Euler equations are solved using the classical predictor-corrector McCormack scheme. The program can be used in many cases involving time-dependent phenomena : mutual influence of two blade-rows, distortion problems, wake passage effects, aeroelasticity. First, the computation program is described with a special importance being given to the boundary-conditions. Then, two calculation examples are given which allow one to evaluate the potential of this method for a detailed unsteady flow analysis.

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