航空学报2025，Vol.46Issue(z1)：26-37,12.DOI:10.7527/S1000-6893.2025.32181
剪刀尾桨气动干扰与非常规布局参数影响
Aerodynamic interference of scissor tail rotor and influence of unconventional layout parameters
摘要
Abstract
Compared with conventional tail rotors,scissor tail rotors exhibit certain noise reduction advantages due to their modulation effect,but suffer from aerodynamic efficiency loss caused by aerodynamic interference between upper and lower rotors.To improve the aerodynamic efficiency of scissor tail rotors,this paper employs overset grid technol-ogy to establish a high-precision numerical simulation method based on Unsteady Reynolds-Averaged Navier-Stokes(URANS)equations.The aerodynamic interference characteristics between the upper and lower scissor tail rotors in hover state is investigated.The research systematically analyzes the influence of configuration parameters including scissor angle,airfoil type,and swept blade tips on aerodynamic performance.Unconventional configurations featuring differential collective pitch settings and varying rotor disk radii between upper and lower rotors are proposed and evalu-ated.Results indicate that:Under constant total collective pitch,the"U"-type scissor tail rotors total thrust shows posi-tive correlation with scissor angle,while upper and lower rotor thrusts demonstrate a seesaw relationship.Moreover,among three typical helicopter tail rotor airfoils,the OA airfoil achieves optimal hover efficiency.Additionally,swept blade tip configuration delays tip stall without improving maximum hover efficiency.For unconventional configurations:increasing lower rotor radius by 10%enhances maximum hover efficiency by 12.5%compared to conventional de-signs.Appropriately adjusting lower rotor collective pitch(+2° relative to upper rotor)optimizes load distribution,achieving 2.4%overall efficiency gain.关键词
剪刀尾桨/气动特性/悬停状态/气动干扰/非常规布局Key words
scissor tail rotor/aerodynamic characteristics/hover state/aerodynamic interference/unconventional layout分类
航空航天引用本文复制引用
ZHU Wangqing,CAO Chenkai,ZHAO Guoqing,ZHU Qinghua,HU Haoyu..剪刀尾桨气动干扰与非常规布局参数影响[J].航空学报,2025,46(z1):26-37,12.基金项目
中国博士后科学基金(2024M764240) China Postdoctoral Science Foundation(2024M764240) （2024M764240）
