Morphing enabling technologies for propulsion system nacelles (MorphElle)
Frane Majić, Ciarán O'Reilly and Gunilla Efraimsson
The MorphElle Project aimed to investigate the potential multi-functional benefits afforded by Active Compliant Systems technologies applied to the inlet and cowl (collectively known as “nacelle”), targeting a service entry year of 2025+. Numerical investigations of the aerodynamic and aeroacoustic performance of an adaptive turbofan-engine inlet are performed. The adaptation is made on the inner front part of the symmetric inlet by changing the positions of two contour knots, which acts as a possible inlet structure morphing. The results show that the adaptation of only a small part of the inlet contour gives benefits in the aerodynamic performance at different flight conditions. Also, there is an influence of the inlet shape adaptation on the noise intensity level as well as the directivity of propagation.
 F. Majić, G. Efraimsson and C. J. O'Reilly. "Potential improvement of aerodynamic performance by morphing the nacelle inlet," Aerospace Science and Technology, vol. 54, pp. 122-131, 2016.
 F. Majić, G. Efraimsson and C. J. O'Reilly. "The influence of an adaptive nacelle inlet lip on fan noise propagation," Proceedings of Meetings on Acoustics, article id 030004, vol. 28, no. 1, pp. 1-10, 2016.
 U. King, A. Seitz, J. Bijewitz, A. Hermanutz, L. da Rocha-Schmidt, F. Scarpa, F. Majić, G. Efraimsson and C. J. O'Reilly. "Shape adaptive technology for aircraft engine nacelle inlets," The Royal Aeronautical Society's 5th Aircraft Structural Design Conference, 2016.
 F. Majić, G. Efraimsson and C. J. O'Reilly. "The influence of an adaptive nacelle inlet lip on fan noise propagation," 22nd International Congress on Acoustics, 2016.
 F. Majić, G. Efraimsson and C. J. O'Reilly. "Aero-acoustic performance of adaptive nacelle inlet," 21st AIAA/CEAS Aeroacoustics Conference, 2015.
 F. Majić, G. Efraimsson and C. J. O'Reilly. "Aerodynamic performance of the adaptive nacelle inlet," 33rd AIAA Applied Aerodynamics Conference, 2015.
 L. da Rocha-Schmidt, A. Hermanutz, H. Baier, A. Seitz, J. Bijewitz, A. T. Isikveren, F. L. Scarpa, G. Allegri, C. Remillat, E. Feuilloley, F. Majic, C. J. O'Reilly and G. Efraimsson. "Progress Towards Adaptive Aircraft Engine Nacelles," 29th Congress of the International Council of the Aeronautical Sciences, ICAS, International Council of the Aeronautical Sciences , 2014.