Dynamics of a ducted rotor in forward flight

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Abstract

An aeroelastic model of a ducted rotor is developed and applied in the investigation of the dynamics of the ducted rotor in forward flight. The studies focus on the rotor vibrations of a fully ducted rotor as well as a duct rotor with a front opening. The results indicate that while the ducted rotor with a front opening can significantly reduce the adverse duct pitching moment, it can also increase hub vibration in forward flight due to the inflow changes, the blade tip-loss effect and rotor edgewise flow speed changes. Other parametric studies such as the blade stiffness and the rotor cyclic pitch controls are also conducted. It is shown that the blade flap stiffness is an important design parameter for the rotor without cyclic pitch controls. The model developed in this study can be refined based on future testing data, and it can also be applied in the preliminary studies of the ducted rotor performance, design and flight control.

Original languageEnglish (US)
Title of host publicationAmerican Helicopter Society International Specialists Conference on Aerodynamics 2008
Pages495-503
Number of pages9
Publication statusPublished - Dec 1 2008
EventAHS Specialists Conference on Aerodynamics 2008 - San Francisco, CA, United States
Duration: Jan 23 2008Jan 25 2008

Publication series

NameAHS Specialists Conference on Aerodynamics 2008
Volume2

Other

OtherAHS Specialists Conference on Aerodynamics 2008
CountryUnited States
CitySan Francisco, CA
Period1/23/081/25/08

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All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Civil and Structural Engineering

Cite this

Zhang, J., Smith, E., & Horn, J. F. (2008). Dynamics of a ducted rotor in forward flight. In American Helicopter Society International Specialists Conference on Aerodynamics 2008 (pp. 495-503). (AHS Specialists Conference on Aerodynamics 2008; Vol. 2).