PL
EN

No. 106, 2000, 69-95

The numerical and experimental verification of the 3D inviscid flutter code
ROMUALD RZĄDKOWSKI, VITALLY GNESIS

Abstract

In this study the numerical calculations were performed to compare the theoretical results of 3D inviscid flutter code with experimental results due to Bólcs and Fransson. The calculations were carried out for the torsional oscillations of the compressor cascade known as the First Standard Configuration, and the bending oscillations of the steam turbine cascade which has become the Fourth Standard Configuration. The developed numerical algorithm solves the Euler equation in conservative form, which is integrated by using the explicit monotonous second-order accurate Godunov-Kolgan finite-volume scheme and the moving hybrid grid. The structural model is based on the 3D and 1D models. The comparison of calculated and experimental results for the 1st and, 4th Standard Configurations has shown the good quantitative and quantative agreement for both integral performances (aerodamping coefficient) and local performances (unsteady pressure amplitude and phase distribution). 

Keywords:

torsional oscillations, bending oscillations, First Standard Configuration, Fourth Standard Configuration

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