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An improved method measures aerodynamic moments in linear blade cascades, indicating potential measurement accuracy enhancements.
An improved method of measuring unsteady aerodynamic moments at torsional oscillations of flexibly mounted blades in a linear cascade is presented. Specifically, a systematic error was found in measuring the real part of the unsteady aerodynamic moment (not affecting system stability). The error cause is identified as a change in the torsional stiffness of the elastic suspension of the blade profile under the influence of a stationary aerodynamic force. A mathematical model for error compensation is developed and successfully applied, improving the measurement method.
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Tsymbalyuk et al. (2025) studied this question.
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