Untersuchung der Schwingungserregung von Laufschaufeln in Axialverdichtern bei Rotating Stall (Investigation of the Excitation of Turbine Blade Vibration in Axial Compressors in Rotating Stall)

摘要

Measurements were performed on the seven-stage axial compressor of a gas turbine to study the characteristics of the rotating separation zones in the first stages and their effects on the production of vibrations. A contactless optoelectronic measuring system for rotating compressor turbines was developed. The unsteady flow quantities in the seven-stage compressor in rotating stall were determined using the split-film-probe measuring technique. A calculation model for the prediction of the compressor behavior in the first stage of the axial compressor was developed on the basis of a nonlinear theory.