Volume 29 Issue 11
Nov.  2014
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FAN Feng, XU Guo-hua, SHI Yong-jie. Calculations of unsteady aerodynamic interaction between main-rotor and tail-rotor of helicopters based on CFD method[J]. Journal of Aerospace Power, 2014, 29(11): 2633-2642. doi: 10.13224/j.cnki.jasp.2014.11.013
Citation: FAN Feng, XU Guo-hua, SHI Yong-jie. Calculations of unsteady aerodynamic interaction between main-rotor and tail-rotor of helicopters based on CFD method[J]. Journal of Aerospace Power, 2014, 29(11): 2633-2642. doi: 10.13224/j.cnki.jasp.2014.11.013

Calculations of unsteady aerodynamic interaction between main-rotor and tail-rotor of helicopters based on CFD method

doi: 10.13224/j.cnki.jasp.2014.11.013
  • Received Date: 2013-07-08
  • Publish Date: 2014-11-28
  • Numerical calculation research was performed for helicopter main-rotor/tail-rotor interaction by using the CFD method. A computational method was established for aerodynamic interactions of main-rotor/tail-rotor configuration, wherein the three-dimensional unsteady Reynolds-averaged Navier-Stokes (RANS) equations were used as the control equations, and overset grid technique was employed to simulate the relative motion between the main-rotor and tail-rotor. Based on the developed method, the aerodynamic characteristics of main-rotor/tail rotor interaction in hover, low-speed forward flight and cruising state were calculated, and the influence of the tail-rotor rotation direction on the interaction characteristics was analyzed. The results indicate that the interference influence of main-rotor on tail-rotor is obvious in all calculation states, but not always negative, depending on the flight condition. The interference influence of tail-rotor on main-rotor is relatively obvious in hover, but negligible in forward flight condition. In addition, the tail-rotor rotation direction has a significant effect on the aerodynamic force of tail-rotor, so reasonable selection of the tail-rotor rotation direction can improve the aerodynamics of tail-rotor.

     

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