Citation:
Antonio Pagano, Salvatore Ameduri, Valerijan Cokonaj, Ales Prachar, Zacharias Zachariadis and Dimitris Drikakis. Helicopter blade morphing strategies aimed at mitigating environmental impact |
Strategie aktywnego kształtowania profilu łopat helikoptera w celu redukcji
negatywnego wpływu ich pracy na środow. Journal of Theoretical and Applied Mechanics, 2011, Volume 49, Issue 4, pp1233-1259, Warsaw
Abstract:
The requirement of mitigating the environmental impact of helicopters has been
addressed globally within the FRIENDCOPTER Project in the sen- se that several
aspects (such as noise abatement, vibration reduction, fuel consumption) have
been studied in parallel with different approaches among which there is the
active blade control. In the work at hand, attention is paid on two topics aimed
at mitigating helicopter environmental impact through a morphing strategy: the
aerodynamic optimization of a blade section who- se camber can be affected by an
actuator and the design of a SMA based static twist concept, aimed at extending
the helicopter flight envelope. The latter device is based on a SMA rod which is
integrated in the spanwise di- rection within the blade structure at different
positions. The actuator, when heated, transmits a torque couple which induces
twist onto the blade. The twist variation due to the SMA device activation has
been predicted by a FE approach (MSC/Marc software implemented with the SMA
Brinson model). Finally, rotor performance in hover has been estimated with the
actuator in power on and off positions, highlighting benefits coming from
several spanwise integrations/distributions of the SMA device.