Communication Dans Un Congrès Année : 2020

Characterization of the propeller for the experimental evaluation of the aerodynamic rotor/propeller interactions in hybrid compound helicopters

Vianney Nowinski

Résumé

Helicopters have always been recognized for their vertical take-off and landing (VTOL) and hovering capabilities. While the demand has increased due to the multiplication of air transports, the military and civil needs cannot be reached by the classical configurations because of 1) a limited maximum speed, 2) a low load capacity, 3) a small autonomy, and 4) a questionable comfort due to vibrations and noises … In that context, the compound helicopters have been designed. Including additional rotors and/or lift wings, those setups entail a rotor slow-down. Different compound configurations have been studied throughout the years: the tilt rotor, the coaxial compound, the tandem helicopter, the simple lift wing… This study focuses on the hybrid compound helicopter, composed of two side propellers mounted on a lift wing as shown in Figure 1. On top of increasing the maximum speed while preserving hovering abilities, the side propellers create an efficient anti-torque facilitating the piloting of the aircraft. This research intends to improve the understanding of the interactional phenomenon, starting with the comprehension of the propeller’s behavior in different flight conditions. Ultimately, besides ensuring the safety and the comfort of the passengers, this study aims to determine the most efficient configuration to limit the emissions while maximizing the performances of the helicopter. The comparison of numerical and experimental results will also lead to the validation, complement and correction of the numerical tools. The final purpose is to reflect more accurately the complex interactional effects to enhance the efficiency of the pre-design phases.

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Dates et versions

hal-03104009 , version 1 (08-01-2021)

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Identifiants

  • HAL Id : hal-03104009 , version 1

Citer

Lefevre Lauriane, Vianney Nowinski. Characterization of the propeller for the experimental evaluation of the aerodynamic rotor/propeller interactions in hybrid compound helicopters. ODAS Onera-DLR Aerospace Symposium ODAS, Nov 2020, Braunschweig, Germany. ⟨hal-03104009⟩

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