The invention provides a laminar flow supercritical rotor wing type which is suitable for the middle part of a high-speed helicopter blade and has an emphasized high-speed characteristic. The radius of the leading edge of the wing type is 0.00377, the maximum thickness of the wing type is 0.12, the wing type is positioned at the 41% chord length of the wing type, the maximum camber is 0.0122, and the wing type is positioned at the 18.6% chord length of the wing type. The airfoil with the thickness of 12% is used near 0.5 R of a blade and located at a main lift section, and the airfoil has the characteristics of medium Mach number, high lift-drag ratio and low-speed high lift while improving the high-speed resistance divergence characteristic of the airfoil. Compared with a classic OA312 airfoil, the resistance divergence Mach number of the designed airfoil is increased by 0.4, the maximum lift coefficient is increased by 11.1%, the high-speed characteristic is remarkably improved and is more stable under the condition that the low-speed characteristic does not generate large breakage, and in consideration of the special design requirements of the high-speed helicopter rotor airfoil, the designed airfoil shows remarkable advantages compared with the classic OA312 airfoil.
本发明提出一种适用于高速直升机桨叶中部的偏重高速特性的层流超临界旋翼翼型,翼型前缘半径为0.00377,翼型最大厚度为0.12,位于翼型41%弦长处,最大弯度为0.0122,位于翼型18.6%弦长处。该12%厚度翼型用于桨叶0.5R附近,位于主升力段,在提高其高速阻力发散特性的同时,也具备中等马赫数高升阻比和低速高升力特性。相对于经典OA312翼型,设计翼型在低速特性不产生较大折损的情况下,阻力发散马赫数提高了0.4,最大升力系数提高了11.1%,高速特性提升显著且更加稳健,考虑到高速直升机旋翼翼型特殊的设计要求,设计翼型相对于经典OA312翼型展示了显著的优势。
Laminar flow supercritical rotor wing type suitable for middle part of high-speed helicopter blade and with emphasizing high-speed characteristic
一种适用于高速直升机桨叶中部的偏重高速特性的层流超临界旋翼翼型
19.09.2023
Patent
Elektronische Ressource
Chinesisch
IPC: | B64C AEROPLANES , Flugzeuge |
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