HYDRODYNAMIC-DESIGN OF THE HUMPBACK WHALE FLIPPER
HYDRODYNAMIC-DESIGN OF THE HUMPBACK WHALE FLIPPER
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DOI：
10.1002/jmor.1052250105
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发表时间：
1995-07-01
影响因子：
1.5
通讯作者：
BATTLE, JM
中科院分区：
文献类型：
--
作者：
FISH, FE;BATTLE, JM
据报道，座头鲸(Megaptera Novaeangliae)在游泳动作中使用其细长的胸鳍。根据这一水动力功能，对9.02米长的鲸鳍的形态进行了评估。鳍状肢有一个翼状的、高纵横比的平面图。圆形结节沿着鳍状骨的前缘有规律地散布。鳍状肢被切成71个2.5厘米的横截面，并被拍照。除远端外，鳍状骨各段均对称，无外倾。鳍状物的前缘钝圆，后缘高度锥形。每个横截面的最大厚度放置位置从顶端的49%到跨中的19%不等。截面厚度比平均为0.23，范围为0.20-0.28。座头鲸的鳍状肢具有典型的人造气动翼片的横截面设计，用于产生升力。前缘结节的形态和位置表明，它们作为增强的升力装置来控制鳍状骨上的流动，并在大攻角下保持升力。座头鲸鳍状肢的形态表明，它适合于与鲸鱼独特的摄食行为相关的高度机动性。(C)1995年Wiley-Liss公司
The humpback whale (Megaptera novaeangliae) is reported to use its elongate pectoral flippers during swimming maneuvers. The morphology of the flipper from a 9.02-m whale was evaluated with regard to this hydrodynamic function. The flipper had a wing-like, high aspect ratio planform. Rounded tubercles were regularly interspersed along the flipper's leading edge. The flipper was cut into 71 2.5-cm cross-sections and photographed. Except for sections near the distal tip, flipper sections were symmetrical with no camber. Flipper sections had a blunt, rounded leading edge and a highly tapered trailing edge. Placement of the maximum thickness placement for each cross-section varied from 49% of chord at the tip to 19% at mid-span. Section thickness ratio averaged 0.23 with a range of 0.20-0.28. The humpback whale flipper had a cross-sectional design typical of manufactured aerodynamic foils for lift generation. The morphology and placement of leading edge tubercles suggest that they function as enhanced lift devices to control flow over the flipper and maintain lift at high angles of attack. The morphology of the humpback whale flipper suggests that it is adapted for high maneuverability associated with the whale's unique feeding behavior. (C) 1995 Wiley-Liss, Inc.