Volume 36 Issue 2
Feb.  2021
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WANG Junjie, YU Zhiming, CHEN Renliang, WANG Zhijin, LU Jiaxin. Aerodynamic characteristics of quad tilt rotor aircraft in vertical flight[J]. Journal of Aerospace Power, 2021, 36(2): 249-263. doi: 10.13224/j.cnki.jasp.2021.02.004
Citation: WANG Junjie, YU Zhiming, CHEN Renliang, WANG Zhijin, LU Jiaxin. Aerodynamic characteristics of quad tilt rotor aircraft in vertical flight[J]. Journal of Aerospace Power, 2021, 36(2): 249-263. doi: 10.13224/j.cnki.jasp.2021.02.004
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Aerodynamic characteristics of quad tilt rotor aircraft in vertical flight

doi: 10.13224/j.cnki.jasp.2021.02.004

  • National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

  • Received Date: 2020-07-10
  • Publish Date: 2021-02-28
    Abstract
  • The computational fluid dynamics (CFD) method based on unstructured grid sliding grid technology and the experiment method of aerodynamic interference were used to simulate the flow field of the quad tilt rotor (QTR) aircraft in helicopter mode. The aerodynamic characteristics of the QTR aircraft in vertical flight and the effect of some parameters on the aerodynamic characteristics were studied. Results showed that the interference between the front and rear rotors of the QTR aircraft was not obvious, but the interference between the rotor and the wing was greater; the interference of the rotor rotation direction on the rotor and the wing was different, the aerodynamic force of the wing accounted for 15% of the rotor thrust in the right rotation, and 9% of the rotor thrust in the left rotation; during the vertical motion of the QTR aircraft, the rotor lift and torque change could cause changes in component force and low/head-up torque in the forward direction; during the vertical descent of the QTR aircraft, the rotor could enter into the vortex ring state. The presence of the wing effectively reduced the destructive effect of the vortex ring state, and the vortex ring reduced the impact of the airflow on the wing tip.

     

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