Experimental study of a passive control of airfoil lift using bioinspired feather flap
Experimental study of a passive control of airfoil lift using bioinspired feather flap
复制标题
仿生羽毛瓣被动控制翼型升力的实验研究
DOI：
10.1088/1748-3190/ab3d57
复制
发表时间：
2019-09
影响因子：
3.4
通讯作者：
周裕
中科院分区：
文献类型：
--
作者：
王龙军;Alam Md Mahbub;周裕
鸟类在飞行过程中以其非凡的敏捷性、机动性、灵活性和耐力而闻名，即使在一些不利的飞行条件下也是如此。鸟的翅膀是最鼓舞人心的元素，吸引了研究人员的注意，以揭示升力产生的潜在物理机制，并将结果应用到人造飞行器中。本文提出了使用安装在吸力或压力表面上的真实羽毛襟翼对 NACA0012 翼型进行被动流动控制的系统实验研究。本研究的重点是确定真实羽毛襟翼在小攻角 (α) 下 NACA0012 翼型的空气动力学性能中的主要作用。羽瓣宽度w及其安装位置xin分别在0.27c至0.8c和0.0至0.2c之间变化，其中xin是从翼型前缘测量的，c是翼型弦长。进行详细的粒子图像测速 (PIV) 测量，以了解羽毛瓣带来的空气动力学优势的根源。安装在吸力侧的襟翼仅在超过失速的大α处才可能产生积极影响。另一方面，当安装在压力侧时，羽毛襟翼被证明有利于提高小α（= -4°至8°）下翼型的气动性能。当w = 0.53c、xin = 0.2c、α = 2°时，升力CL和升阻比CL/CD分别提高了186%和72%。与平翼型相比，扑动翼型周围的时均涡度、瞬时涡度、时均流向速度和横向速度分别减弱、减少和增加，这归因于 CL 和 CL/CD 的增加。
Birds are known for their extraordinary agility, maneuverability, flexibility and endurance during their flight, even under some adverse flying conditions. Bird wings have been the most inspirational element, attracting the attention of researchers to reveal the underlying physical mechanism of lift production as well as to apply the results into the artificial flying vehicles. This paper presents a systematic experimental investigation on a passive flow control of a NACA0012 airfoil using real feather flap which is installed on the suction or pressure surface. The focus of the present study is to determine the major role of a real feather flap in the aerodynamic performance of a NACA0012 airfoil at small attack angles (α). The feather flap width w and its installation position xin are varied from 0.27c to 0.8c and from 0.0 to 0.2c, respectively, where xin is measured from the leading edge of the airfoil, and c is the chord length of the airfoil. Detailed particle image velocimetry (PIV) measurements are conducted to understand the origin of the aerodynamic benefits introduced by the feather flap. The flap mounted on the suction side may have a positive impact only at large α, beyond the stall. On the other hand, when mounted on the pressure side, the feather flap is proved to be beneficial to improve the aerodynamic performance of the airfoil at small α (= −4° to 8°). The lift CL and lift-to-drag ratio CL/CD are enhanced by 186% and 72%, respectively, for w = 0.53c, xin = 0.2c at α = 2°. Time-averaged and instantaneous vorticities, time-averaged streamwise velocity, and lateral velocity around the flapped airfoil weaken, decrease and increase, respectively, compared with those around the plain airfoil, which are attributed to the increased CL and CL/CD.
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DOI：
10.2495/1-84564-095-0/05
发表时间：
2006-11
期刊：
WIT Transactions on State-of-the-art in Science and Engineering
影响因子：
--
作者：
C. B. Pedersen;Zbikowski
通讯作者：
C. B. Pedersen;Zbikowski
DOI：
10.1007/s10494-018-9914-6
发表时间：
2018
期刊：
Flow, turbulence and combustion
影响因子：
--
作者：
Rosti ME;Omidyeganeh M;Pinelli A
通讯作者：
Pinelli A
影响因子：
2.2
作者：
Traub, Lance W.;Jaybush, Logan
通讯作者：
Jaybush, Logan
影响因子：
2.2
作者：
C. Wong;K. Rinoie
通讯作者：
C. Wong;K. Rinoie
影响因子：
2.5
作者：
Meyer, Robert;Hage, Wolfram;Thiele, Frank
通讯作者：
Thiele, Frank