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- W2315520467 abstract "The present work explores prescribed pitching as a means of actively controlling the Blade Vortex Interaction (BVI) component of rotor noise. Distributed piezoceramic actuators would dynamically twist the helicopter rotor blades, resulting in a locally pitching motion. A 2-D Euler Navier-Stokes solver is used to analyse a simple 2-D model of a vortex interacting with a pitching airfoil. Two different formulations, based upon the calculated unsteady loadings are examined to calculate the required pitching motion of the airfoil about the quarterchord. It is demonstrated that the resulting far-field acoustic signature of the airfoil-vortex interaction can be reduced several-fold. Several implementation issues are examined and recommendations proposed for future work." @default.
- W2315520467 created "2016-06-24" @default.
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- W2315520467 date "1995-06-19" @default.
- W2315520467 modified "2023-09-27" @default.
- W2315520467 title "Reduction of blade vortex interaction noise using prescribed pitching" @default.
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- W2315520467 doi "https://doi.org/10.2514/6.1995-1891" @default.
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