Novel, bi-directional, variable camber airfoil via macro-fiber composite actuators

Onur Bilgen, Kevin B. Kochersberger, Daniel J. Inman, Osgar J. Ohanian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Scopus citations

Abstract

A novel, bi-directional variable camber airfoil design employing a type of piezoceramic composite actuator known as Macro-Fiber Composite (MFC) is presented. From a broader perspective, the study aims to understand the behavior of solid-state aerodynamic force generation in high dynamic pressure airflow. The novel airfoil employs two active surfaces and a single four-bar (box) mechanism as the internal structure. The airfoil produces deflection in both directions from a flat camber line. The paper focuses on actuation modeling and response characterization under aerodynamic loads. A parametric study of aerodynamic response is employed to optimize kinematic parameters of the airfoil. The concept is fabricated implementing eight MFC 8557-P1 type actuators in a bimorph configuration to construct the active surfaces. The box mechanism generates deflection and camber change as predicted. Wind tunnel experiments are conducted on a 12.6% maximum thickness, 127 mm chord airfoil. Aerodynamic and structural performance results are presented for a flow rate of 15 m/s and Reynolds Number of 127,000. Non-linear effects due to aerodynamic and piezoceramic hysteresis are identified and discussed. A lift coefficient change of 1.67 is observed purely due to voltage actuation. A maximum L/D ratio of 26.7 is recorded through voltage excitation. Results are compared to conventional, fixed-camber airfoils evaluated by other researchers.

Original languageEnglish (US)
Title of host publication50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - Dec 1 2009
Externally publishedYes
Event50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Palm Springs, CA, United States
Duration: May 4 2009May 7 2009

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ISSN (Print)0273-4508

Other

Other50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityPalm Springs, CA
Period5/4/095/7/09

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All Science Journal Classification (ASJC) codes

  • Architecture
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • Bimorph
  • Macro-Fiber Composite
  • Morphing
  • Piezoceramic
  • Variable camber airfoil

Cite this

Bilgen, O., Kochersberger, K. B., Inman, D. J., & Ohanian, O. J. (2009). Novel, bi-directional, variable camber airfoil via macro-fiber composite actuators. In 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference [2009-2133] (Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference).