共轴刚性旋翼空气动力学问题与研究进展

基于共轴刚性旋翼独特的运动特征,分析了前后行桨叶气动载荷的巨大差异所引起的旋翼严重非定常气动特性,阐述了共轴刚性旋翼特有的升力偏置特性、双旋翼气动干扰特性以及桨毂阻力特性等若干空气动力学问题。在此基础上,针对共轴刚性旋翼的特殊气动问题,概述了目前在空气动力学基础理论、气动布局优化设计、桨毂减阻设计以及相应的气动特性试验等共轴刚性旋翼空气动力学领域的研究进展。最后,基于目前高速共轴旋翼直升机研究的瓶颈问题,指出了共轴刚性旋翼空气动力学领域后续的发展方向和研究重点。

Aerodynamic Problems and Research Progresses of Rigid Coaxial Rotor

Based on the specific motion features of coaxial rigid rotor, the complex unsteady aerodynamic characteristics caused by the great difference on airloads of the advancing side and retreating side are analyzed and some particular aerodynamic problems including lift?offset, rotor?to?rotor interactions and hub drag are summarized. Focused on the special aerodynamic problems of coaxial rigid rotor, the recent research progresses on aerodynamic theory, aerodynamic configuration optimization design and corresponding experiments are reviewed. Finally, the further development direction and research priorities on coaxial rigid rotor aerodynamics are pointed out considering the bottlenecks which exist in current studies.