Volume 35 Issue 11
Nov.  2020
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YANG Kelong, HAN Dong, SHI Qipeng. Lifting and propulsion devices for flight performance ,improvement of a compound helicopter[J]. Journal of Aerospace Power, 2020, 35(11): 2429-2439. doi: 10.13224/j.cnki.jasp.2020.11.020
Citation: YANG Kelong, HAN Dong, SHI Qipeng. Lifting and propulsion devices for flight performance ,improvement of a compound helicopter[J]. Journal of Aerospace Power, 2020, 35(11): 2429-2439. doi: 10.13224/j.cnki.jasp.2020.11.020

Lifting and propulsion devices for flight performance ,improvement of a compound helicopter

doi: 10.13224/j.cnki.jasp.2020.11.020
  • Received Date: 2020-04-09
  • Publish Date: 2020-11-28
  • To analyze the effects of lifting and propulsion devices for flight performance improvement of a compound helicopter, a model of performance prediction was developed. Based on the UH-60A helicopter equipped with a wing and a propeller, the influence mechanism of parameters of the wing and propeller, lift and propulsive force shares on the performance was analyzed. At low speeds, due to the low efficiency of the wing and propeller, equipping the wing and propeller decreased the lift-to-drag ratio of the helicopter. The higher rotor speed or blade twist of the propeller led to larger profile power of the propeller, and further reduced the lift-to-drag significantly. At high speeds, the efficiency of the wing and propeller was higher; the performance was significantly improved when the wing and propeller offloaded most of the lift and propulsive force with the decrease of the main rotor speed; the lift-to-drag ratio increased first and then decreased as increasing the lift and propulsive force shares. At a speed of 300 km/h, optimizing the lift and propulsive force share, at 100%, 95%, 85% and 80% of main rotor speed, increased the lift-drag ratio by 40%, 2133%, 270% and 306%, respectively.

     

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