The invention discloses a propeller blade profile, belongs to the field of aviation aerodynamic design, and relates to an outer contour shape of an aircraft propeller blade. According to the technical scheme, the overall shape of the blade is a saber-shaped sweepback blade, the root of the blade is approximately circular, the blade body section from the blade root to the blade tip is composed of a plurality of ARAH airfoil shapes similar to a wing, the thickness is in smooth transition from thick to thin, and a certain torsion angle is kept between the sections, so that the airfoil cannot stall in the working process of the blade, and the blade is stable in performance. According to the propeller, the propeller blade is arranged in the airfoil shape, large aerodynamic lift force and small aerodynamic resistance are generated, the overall shape of the propeller blade is made to generate a saber-shaped sweepback by designing continuous changes of the airfoil aerodynamic center, noise is made to be smaller than that of propeller blades in other shapes when the propeller blade works, and therefore the pulling force and aerodynamic efficiency of the propeller are improved.
本发明一种螺旋桨桨叶外形属于航空空气动力设计领域,涉及一种飞机螺旋桨桨叶的外轮廓形状。本发明的技术方案整体形状为马刀型后掠桨叶,桨叶根部接近圆形,从叶根到叶尖的叶身剖面由多个与机翼相近的ARAH翼型形状组成,厚度由厚到薄光滑过渡,每一个截面之间保持一定的扭转角度,以使桨叶在工作过程中翼型不会失速,并产生较大的气动升力,较小的气动阻力,通过设计翼型气动中心的不断变化,使桨叶的整体形状产生马刀型后掠,以使桨叶在工作时噪声较其他形状桨叶小,从而提高了螺旋桨本身的拉力和气动效率。
Propeller blade profile
一种螺旋桨桨叶外形
2024-07-02
Patent
Electronic Resource
Chinese
IPC: | B64C AEROPLANES , Flugzeuge |
Rotor craft, propeller blade of rotor craft and airfoil profile of propeller blade
European Patent Office | 2021
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