航空学报 > 2025, Vol. 46 Issue (17): 131728-131728   doi: 10.7527/S1000-6893.2025.31728

面向飞-推融合构型的分布式涵道风扇新型高效高精度动量源方法

韩凯1, 白俊强1,2,3, 冯少东4, 余时泷4, 黄俊炜4, 唐矗1,2,3, 邱亚松1,2,3()   

  1. 1.西北工业大学 无人系统技术研究院,西安 710072
    2.无人飞行器技术全国重点实验室,西安 710072
    3.无人机技术集成攻关大平台,西安 710072
    4.西北工业大学 航空学院,西安 710072
  • 收稿日期:2024-12-30 修回日期:2025-01-16 接受日期:2025-02-25 出版日期:2025-03-13 发布日期:2025-03-06
  • 通讯作者: 邱亚松 E-mail:qiuyasong@nwpu.edu.cn
  • 基金资助:
    中央高校基本科研业务费(G2024KY0604);山西省科技重大专项计划“揭榜挂帅”项目(202101120401007);西北工业大学博士论文创新基金(CX2023085)

A novel high-efficiency and high-precision momentum source method for distributed ducted fans in aero-propulsion coupling configuration

Kai HAN1, Junqiang BAI1,2,3, Shaodong FENG4, Shilong YU4, Junwei HUANG4, Chu TANG1,2,3, Yasong QIU1,2,3()   

  1. 1.Unmanned System Technology Research Institute,Northwestern Polytechnical University,Xi’an 710072,China
    2.National Key Laboratory of Unmanned Aerial Vehicle Technology,Xi’an 710072,China
    3.Integrated Research and Development Platform of Unmanned Aerial Vehicle Technology,Xi’an 710072,China
    4.School of Aeronautic,Northwestern Polytechnical University,Xi’an 710072,China
  • Received:2024-12-30 Revised:2025-01-16 Accepted:2025-02-25 Online:2025-03-13 Published:2025-03-06
  • Contact: Yasong QIU E-mail:qiuyasong@nwpu.edu.cn
  • Supported by:
    Fundamental Research Funds for the Central Universities(G2024KY0604);Shanxi Province Science and Technology Major Project “Unveiling the List and Leading the Team”(202101120401007);Northwestern Polytechnical University Doctoral Dissertation Innovation Fund(CX2023085)

摘要:

由于分布式涵道风扇-机翼融合构型存在复杂的气动耦合效应,准确高效地求解其气动特性一直是具有挑战性的任务。因此,提出了一种基于雷诺平均纳维-斯托克斯(RANS)方程,并充分考虑多部件气动-推进耦合效应的分布式涵道风扇新型动量源方法。该方法通过简化风扇动静叶的流场计算,大幅提高计算效率。同时准确捕捉机翼边界层黏性效应、进气道加速效应及排气道尾迹等部件耦合影响,从而准确预测机翼、进气道和排气道等部件的气动性能。该方法中,首先采用多重参考坐标系(MRF)方法求解RANS方程获得准定常流场,然后提取风扇前后交界面处的三方向速度、湍动能和湍流涡耗散率信息,并将其作为边界条件施加于无风扇构型,以模拟涵道风扇的动力效应。在单涵道风扇-翼段融合构型测试中,该方法在4°迎角下提取的流场信息可准确预测16°迎角范围内的同构型气动性能及不同翼型构型下的气动性能。与MRF方法相比,在2°~16°迎角下,计算的升力系数相对误差<2%,阻力系数相对误差<4.5%,计算精度优于传统动量源方法,并减少计算核时超过90%。在分布式涵道风扇-机翼融合构型测试中,该方法同样表现出较高精度与显著的效率优势,为分布式涵道风扇构型的气动性能预测提供了高效、可靠的工具。

关键词: 飞-推融合构型, 涵道风扇, 气动性能, 动量源方法, 高效高精度

Abstract:

The distributed ducted fan-wing integration configuration presents a challenging aerodynamic problem due to its complex aerodynamic coupling effects, making accurate and efficient aerodynamic performance predictions difficult. Therefore, this paper proposes a novel momentum source method for the distributed ducted fan, based on the Reynolds-Averaged Navier-Stokes (RANS) equations, which fully accounts for the multi-component aerodynamic-propulsion coupling effects. By simplifying the flow field calculation of the fan’s rotor and stator blades, this method significantly improves computational efficiency while accurately capturing the coupling effects of the wing boundary layer viscous effects, intake acceleration effects, and exhaust wake; thereby, providing precise predictions of the aerodynamic performance for the wing, intake, and exhaust. Specifically, in this method, the RANS equations are solved using the Multiple Reference Frame (MRF) approach to obtain a quasi-steady flow field. Then, the three-directional velocity, turbulent kinetic energy, and turbulence eddy dissipation at the fan’s front and rear interfaces are extracted and imposed as boundary conditions to the fan-less configuration to simulate the propulsion effects of the ducted fan. In the single ducted fan-wing section coupling configuration test, the flow field information extracted at a 4° angle of attack can accurately predict the aerodynamic performance of the same configuration within a 16° angle of attack range, as well as the aerodynamic performance of different airfoil configurations. Compared with the MRF method, the proposed method shows a relative error in lift coefficient of less than 2% and in drag coefficient of less than 4.5% in the 2°-16° angle of attack range, demonstrating superior accuracy over traditional momentum source methods while reducing computational cost by more than 90%. In the distributed ducted fan-wing coupling configuration test, this method also demonstrates high accuracy and significant efficiency advantages, providing an efficient and reliable tool for aerodynamic performance prediction of distributed ducted fan configurations.

Key words: aero-propulsion coupling configuration, ducted fan, aerodynamic performance, momentum source method, high-efficiency and high-precision

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