Numerical investigation of the effects of dynamic camber variation on the airfoil characteristics of a pitching rotor airfoil

Amine Abdelmoula, Stefan Platzer, Manfred Hajek, Jürgen Rauleder

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations


This paper presents a numerical investigation of a 2D harmonically morphed rotor airfoil during a pitching motion. Active camber morphing has the potential to significantly improve rotor efficiency when actuated dynamically during the pitching cycle over a rotor revolution. To analyze these potential performance gains, rotor comprehensive aeromechanics codes are frequently used. These analyses typically rely on steady airfoil tables as input. However, these two-dimensional aerodynamic input values do not account for the unsteady hysteresis and any aerodynamic interactions between the pitching motion and simultaneous dynamic camber morphing. To this end, URANS CFD simulations were conducted at a pitch frequency of fθ =7 Hz that corresponds to the frequency of the pitching cycle of the Bo 105 main rotor. The simultaneous harmonic camber morphing of the aft section was actuated at the same frequency fδ =7 Hz and was increased up to fδ =14 Hz. The impact of the phase shift angle between the pitch and camber morphing actuation for different mean values and amplitudes of the camber morphing deflection were investigated and evaluated by means of the 2D aerodynamic characteristics Cn and Cm. Comparisons were made with steady airfoil coefficients obtained for the same operating conditions. Significant deviations were found between steady and unsteady airfoil characteristics. That is, the hysteresis loop of combined pitch and camber morphing contained significant unsteady effects. These effects are not included in standard steady airfoil lookup tables typically used for rotor comprehensive aeromechanics analysis.

Original languageEnglish
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Number of pages17
ISBN (Print)9781624105951
StatePublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: 6 Jan 202010 Jan 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF


ConferenceAIAA Scitech Forum, 2020
Country/TerritoryUnited States


Dive into the research topics of 'Numerical investigation of the effects of dynamic camber variation on the airfoil characteristics of a pitching rotor airfoil'. Together they form a unique fingerprint.

Cite this