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一种分布式电动飞机方案螺旋桨滑流对机翼影响机理研究-2021增刊

饶崇1,张铁军2,魏闯1,刘影1   

  1. 1. 中国航空工业空气动力研究院
    2. 中国航空工业集团公司空气动力研究院
  • 收稿日期:2021-09-15 修回日期:2021-10-13 出版日期:2021-10-14 发布日期:2021-10-14
  • 通讯作者: 饶崇

Influence mechanism of propeller slipstream on wing of a distributed electric aircraft scheme

  • Received:2021-09-15 Revised:2021-10-13 Online:2021-10-14 Published:2021-10-14
  • Contact: Chong RAO

摘要: 本文提出一种分布式电推进螺旋桨飞机,采用二阶精度求解Rans方程的k-ω SST湍流模型,运用多参考系方法(MRF),针对低速特性进行数值模拟,得到分布式螺旋桨滑流效应对全机气动特性的影响规律,重点对螺旋桨后方速度场及机翼表面压力分布进行分析。结果表明,有滑流状态增加了全机升力和阻力,改善了失速性能,增加了低头力矩;螺旋桨旋转增加了周向速度,改变了径向速度分布,增加轴向速度,高能量螺旋桨滑流改变机翼当地升阻力特性;螺旋桨桨叶向上旋转一侧气流受上洗影响而局部迎角增加,另一侧局部迎角降低,越靠近桨盘位置受螺旋桨洗流带来的影响越大。

关键词: 分布式, 电动飞机, 多参考系方法, 滑流效应, 气动性能, 压力分布

Abstract: This paper proposes a distributed electric-propelled propeller aircraft, which uses the second-order precision k-ω SST turbulence model to solve the Rans equation, and uses the multiple reference frame (MRF) method to carry out numerical simulation for the low-speed characteristics, and obtains the influence of the distributed propeller slipstream effect on the aerodynamic characteristics of the entire aircraft.The results show that the slip flow state increases the lift and drag of the whole machine, improves the stall performance, and increases the head-down moment; The rotation of the propeller increases the circumferential speed, changes the radial speed distribution, increases the axial speed, and the high-energy propeller slipstream changes the local lift and drag characteristics of the wing; The airflow of the propeller blades rotates upwards, and the local angle of attack increases due to the upwashing effect on one side, and the local angle of attack on the other side decreases.

Key words: Distributed, Electric aircraft, Multiple reference frame, Slipstream effect, Aerodynamic performance, Pressure distribution

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