Formation of vortices on a tubercled wing, and their effects on drag
Formation of vortices on a tubercled wing, and their effects on drag
复制标题
DOI：
10.1016/j.ast.2016.06.025
复制
发表时间：
2016-09
影响因子：
5.6
通讯作者：
M. D. Bolzon;R. Kelso;M. Arjomandi
中科院分区：
文献类型：
--
作者：
M. D. Bolzon;R. Kelso;M. Arjomandi
在0°、3°、6°、9°和12°迎角下对2个掠过的NACA 0021机翼进行了尾迹测量。一只翅膀有光滑的前缘，另一只有块茎状的前缘。掠过结节状机翼导致每个涡对中的一个涡强至少是另一个的4倍。在3°时，两翼翼尖涡强度相差不大。从6°开始，小结节减弱了翼尖涡的强度。结节槽倾向于在剖面和诱导阻力系数中分别产生局部极大值和极小值。在山顶上，情况正好相反。翼型、诱导阻力系数和总阻力系数的变化主要来自翼展，翼尖区的贡献很小。
Wake surveys of 2 swept NACA 0021 wings were conducted at angles of attack of 0°, 3°, 6°, 9°, and 12°. One wing had a smooth leading edge and the other had a tubercled leading edge. Sweeping the tubercled wing resulted in one vortex in each vortex pair being at least 4 times stronger than the other. There was little difference between the strength of the wingtip vortices of either wing at 3°. From 6° onwards tubercles reduced the strength of the wingtip vortex. The tubercle troughs tended to produce local maxima and minima in the profile and induced drag coefficients, respectively. The converse was true over the peaks. The change in the profile, induced, and total drag coefficients primarily arose from over the wingspan; there was little contribution from the wingtip region.