The aerodamping (Fig. 3) is obtained by computing a (normalized) work done by the fluid on
the blade surface over one vibration cycle. In order to see where the stabilizing and destabilizing
contributions are localized, the aerodamping surface density may be visualized on the blade surface:
the integration of this quantity over the entire blade surface gives the aerodamping coefficient value.
The aerodamping surface density is shown on the pressure side of the blade in Fig. 5 and on the suction
side in Fig. 6, for the four presented aeroelastic simulations (again, the shown IBPA is +72◦
). As can
be seen, most differences among the numerical results are localized on the suction side, especially on
the trailing half
Further work is planned: a first follow-up activity is the application of the non-linear method with
injections: it could be interesting to see whether the results will further improve.
Another task is the simulation of other experiments carried out on the same test rig, where the
blades vibrate in clusters (the linearized simulations have already been performed).
The aerodamping (Fig. 3) is obtained by computing a (normalized) work done by the fluid onthe blade surface over one vibration cycle. In order to see where the stabilizing and destabilizingcontributions are localized, the aerodamping surface density may be visualized on the blade surface:the integration of this quantity over the entire blade surface gives the aerodamping coefficient value.The aerodamping surface density is shown on the pressure side of the blade in Fig. 5 and on the suctionside in Fig. 6, for the four presented aeroelastic simulations (again, the shown IBPA is +72◦). As canbe seen, most differences among the numerical results are localized on the suction side, especially onthe trailing halfFurther work is planned: a first follow-up activity is the application of the non-linear method withinjections: it could be interesting to see whether the results will further improve.Another task is the simulation of other experiments carried out on the same test rig, where theblades vibrate in clusters (the linearized simulations have already been performed).
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