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Research on control effectiveness of fluidic thrust vectoring.

Fei Xue1, Gu Yunsong2, Yuchao Wang1

  • 1China Academy of Aerospace Aerodynamics, Beijing, China.

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Fluidic thrust vectoring nozzles effectively control aircraft flow at varying altitudes. This technology provides significant lateral force and torque, enhancing maneuverability and potentially replacing conventional rudder surfaces.

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Area of Science:

  • Aerospace Engineering
  • Fluid Dynamics

Background:

  • Aircraft control at extreme altitudes presents unique challenges.
  • Conventional control surfaces may be less effective in low-density, high-altitude environments.

Purpose of the Study:

  • To investigate the control effectiveness of fluidic thrust vectoring technology.
  • To analyze its performance in high-altitude/low-density and low-altitude/high-density conditions.

Main Methods:

  • Computational Fluid Dynamics (CFD) simulations using the S-A turbulence model in FLUENT software.
  • Analysis of flow fields inside and outside a variable geometry nozzle.

Main Results:

  • Fluidic thrust vectoring demonstrated effective flow control in both ground and high-altitude states.
  • Continuous adjustment of mainstream deflection angle achieved, with maximums of 21.86° (ground) and 18.80° (20 km).
  • Lateral force generated was up to 0.32 times main thrust at high altitude.

Conclusions:

  • Fluidic thrust vectoring provides substantial lateral force and torque, enhancing aircraft agility.
  • This technology offers a viable alternative or replacement for conventional rudders, especially in high-altitude/low-density conditions.