Stability analysis of a scaled tiltrotor model with wing extensions and winglets

Research output: Contribution to conferencePaper

Abstract

A scaled tiltrotor wind tunnel model with wing extensions and winglets has been investigated using RCAS modeling. The scaled model is based on the properties of NASA XV-15 model. The model consists of three highly twisted elastic rotor blades attached to a gimbaled hub. Wing, wing extension and winglet structures are modelled using the finite element formulation of nonlinear beam elements. Nonlinear lifting line theory is used for the aerodynamic modeling for both rotor blades and main wing and wing tip devices. The effects of wing extension and winglet on whirl flutter speeds and wing mode damping are investigated. Parametric studies of the wing extension and winglet have been conducted. The results show that wing extensions and winglets can significantly increase the wing beam mode damping, but their effect on the wing torsion mode damping is limited due to relatively high wing torsion stiffness. While various parameters of wing extensions and winglets may influence the wing mode damping, the dominate factor is the length of wing tip devices. The results also show that the structural tailoring such as main wing beam stiffness tapering and wing extension beam stiffness tuning may be more effective on the wing beam mode than on the wing torsion mode.

Original languageEnglish (US)
StatePublished - Jan 1 2018
EventAHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018 - San Francisco, United States
Duration: Jan 16 2018Jan 18 2018

Other

OtherAHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018
CountryUnited States
CitySan Francisco
Period1/16/181/18/18

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Damping
Torsional stress
Stiffness
Turbomachine blades
Rotors
Flutter (aerodynamics)
Wind tunnels
NASA
Aerodynamics
Tuning

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

Zhang, J., Kang, H., & Smith, E. (2018). Stability analysis of a scaled tiltrotor model with wing extensions and winglets. Paper presented at AHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018, San Francisco, United States.
Zhang, Jianhua ; Kang, Hao ; Smith, Edward. / Stability analysis of a scaled tiltrotor model with wing extensions and winglets. Paper presented at AHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018, San Francisco, United States.
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abstract = "A scaled tiltrotor wind tunnel model with wing extensions and winglets has been investigated using RCAS modeling. The scaled model is based on the properties of NASA XV-15 model. The model consists of three highly twisted elastic rotor blades attached to a gimbaled hub. Wing, wing extension and winglet structures are modelled using the finite element formulation of nonlinear beam elements. Nonlinear lifting line theory is used for the aerodynamic modeling for both rotor blades and main wing and wing tip devices. The effects of wing extension and winglet on whirl flutter speeds and wing mode damping are investigated. Parametric studies of the wing extension and winglet have been conducted. The results show that wing extensions and winglets can significantly increase the wing beam mode damping, but their effect on the wing torsion mode damping is limited due to relatively high wing torsion stiffness. While various parameters of wing extensions and winglets may influence the wing mode damping, the dominate factor is the length of wing tip devices. The results also show that the structural tailoring such as main wing beam stiffness tapering and wing extension beam stiffness tuning may be more effective on the wing beam mode than on the wing torsion mode.",
author = "Jianhua Zhang and Hao Kang and Edward Smith",
year = "2018",
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Zhang, J, Kang, H & Smith, E 2018, 'Stability analysis of a scaled tiltrotor model with wing extensions and winglets' Paper presented at AHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018, San Francisco, United States, 1/16/18 - 1/18/18, .

Stability analysis of a scaled tiltrotor model with wing extensions and winglets. / Zhang, Jianhua; Kang, Hao; Smith, Edward.

2018. Paper presented at AHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018, San Francisco, United States.

Research output: Contribution to conferencePaper

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N2 - A scaled tiltrotor wind tunnel model with wing extensions and winglets has been investigated using RCAS modeling. The scaled model is based on the properties of NASA XV-15 model. The model consists of three highly twisted elastic rotor blades attached to a gimbaled hub. Wing, wing extension and winglet structures are modelled using the finite element formulation of nonlinear beam elements. Nonlinear lifting line theory is used for the aerodynamic modeling for both rotor blades and main wing and wing tip devices. The effects of wing extension and winglet on whirl flutter speeds and wing mode damping are investigated. Parametric studies of the wing extension and winglet have been conducted. The results show that wing extensions and winglets can significantly increase the wing beam mode damping, but their effect on the wing torsion mode damping is limited due to relatively high wing torsion stiffness. While various parameters of wing extensions and winglets may influence the wing mode damping, the dominate factor is the length of wing tip devices. The results also show that the structural tailoring such as main wing beam stiffness tapering and wing extension beam stiffness tuning may be more effective on the wing beam mode than on the wing torsion mode.

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Zhang J, Kang H, Smith E. Stability analysis of a scaled tiltrotor model with wing extensions and winglets. 2018. Paper presented at AHS International Technical Meeting on Aeromechanics Design for Transformative Vertical Flight 2018, San Francisco, United States.