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Volume 27 Issue 3
Mar.  2001
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Journal of Beijing University of Aeronautics and Astronautics  > 2001  >  27(3): 297-300.
SU Yuan, WANG Ji-fei, CAO Yi-hua, et al. Effects of Rotor Downwash on Engine Jet[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(3): 297-300. (in Chinese)
Citation: SU Yuan, WANG Ji-fei, CAO Yi-hua, et al. Effects of Rotor Downwash on Engine Jet[J]. Journal of Beijing University of Aeronautics and Astronautics, 2001, 27(3): 297-300. (in Chinese)
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Effects of Rotor Downwash on Engine Jet

  • Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics

  • Received Date: 18 May 2000
  • Publish Date: 31 Mar 2001
    Abstract
  • An analytical method to predict the effects of rotor downwash on engine jet was proposed to investigate the flow pattern of helicopter engine jet. First, free wake analysis was carried out to calculate the rotor wake geometry and the downwash around the engine jet space. Then engine jet path, cross section shape and physical variants were calculated and analysed. Finally, an example was given to show that the method can be used to predict temperature distribution of a helicopter.

     

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    • References(1)
  • [1] Landgrebe A J. The wake geometry of a hovering helicopter rotor and its influence on rotor performance[J]. J of A H S, 1972,17(4):3~15. [2] Cao Yihua. A new method for predicting rotor wake geometries and downwash velocity field[J]. Aircraft Engineering and Aerospace Technology:An International Journal, 1999,71(2):129~135. [3] Felker F F, Quackenbush T R, Bliss D B, et al. Comparisons of predicted and measured rotor performance in hover using a new free wake analysis[J]. Vertica, 1990,14(3):361~383. [4] Adler D,Baron A. Prediction of a three-dimensional jet in crossflow[J]. AIAA J, 1979,17(2):168~174.
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