The present work deals with a methodology for the alleviation of loads and corresponding emitted noise generated by blade-vortex interaction (BVI) phenomena occurring on helicopter main rotors in low-speed, descent flight. It consists of a multi-cyclic, optimal control approach driving higher harmonic blade pitch actuation. First, for the specific flight condition to be examined, the BVI phenomena are simulated as equivalent two-dimensional, multi-vortex, parallel BVI problems and then a local controller methodology is applied for the efficient identification of the closed-loop control algorithm. In order to assess the capability of the proposed control approach to alleviate rotor blade loads and emitted noise, the results of a numerical investigation concerning a realistic helicopter main rotor in descent flight are presented and discussed.

Parallel Blade-Vortex Interaction Modelling for Helicopter Rotor Noise Control Synthesis / Modini, Sara; Graziani, Giorgio; Bernardini, G.; Gennaretti, M.. - In: INTERNATIONAL JOURNAL OF AEROACOUSTICS. - ISSN 1475-472X. - STAMPA. - 13:7-8(2014), pp. 587-606. [10.1260/1475-472X.13.7-8.587]

Parallel Blade-Vortex Interaction Modelling for Helicopter Rotor Noise Control Synthesis

MODINI, SARA;GRAZIANI, Giorgio;
2014

Abstract

The present work deals with a methodology for the alleviation of loads and corresponding emitted noise generated by blade-vortex interaction (BVI) phenomena occurring on helicopter main rotors in low-speed, descent flight. It consists of a multi-cyclic, optimal control approach driving higher harmonic blade pitch actuation. First, for the specific flight condition to be examined, the BVI phenomena are simulated as equivalent two-dimensional, multi-vortex, parallel BVI problems and then a local controller methodology is applied for the efficient identification of the closed-loop control algorithm. In order to assess the capability of the proposed control approach to alleviate rotor blade loads and emitted noise, the results of a numerical investigation concerning a realistic helicopter main rotor in descent flight are presented and discussed.
2014
blade-vortex interaction; rotorcraft; noise
01 Pubblicazione su rivista::01a Articolo in rivista
Parallel Blade-Vortex Interaction Modelling for Helicopter Rotor Noise Control Synthesis / Modini, Sara; Graziani, Giorgio; Bernardini, G.; Gennaretti, M.. - In: INTERNATIONAL JOURNAL OF AEROACOUSTICS. - ISSN 1475-472X. - STAMPA. - 13:7-8(2014), pp. 587-606. [10.1260/1475-472X.13.7-8.587]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/548249
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