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1)  long-based dorsal fin
长背鳍
1.
The fish is propelled by undulations of a long-based dorsal fin while the body axis is in many cases held straight in swimming.
以依靠长背鳍推进的“尼罗河魔鬼”为研究对象,对柔性长鳍波动推进模式的运动学进行了研究。
2)  Undulatory Dorsal Fin
柔性长背鳍
1.
Research on Structure Design and Simulation for the Bionic Set Inspired by Undulatory Dorsal Fin;
柔性长背鳍波动仿生装置的结构设计与仿真技术研究
3)  fin [英][fɪn]  [美][fɪn]
背鳍
1.
Visualization and measurement study of vortex flow over delta wing with dorsal fins
带背鳍平板三角翼分离涡流场的显示与测量
2.
5° sweep angle and combination of the identical delta wing with low dorsal fins.
对细长体平板三角翼和加上两个不同高度背鳍后的组合体在低速风洞进行了六分量天平测力实验,三角翼后掠角82。
3.
The purpose of the present paper is to investigate the characteristic feature of the aerodynamics of a nose cone at a high angle of attack and study the vortex stability problem for the flow over a flat-plate delta wing with the dorsal fin.
本论文主要是通过实验来研究细长圆锥体在大迎角下的绕流流场的特性和细长三角翼加背鳍后对前缘涡的影响,检验相关理论结果。
4)  dorsal fin
背鳍
1.
Our interest was aroused by Cai′s theoretical conclusion concerning the effect of dorsal fin height on symmetry and asymmetry of vortex(separation vortex) pairs over slender conical wings and bodies~([3]).
5°的三角翼,针对不同背鳍高度情况,研究了背鳍高度HC/S分别为0、0。
2.
This paper deals with the numerical solution of the Euler equation for airfoils using approximate boundary conditions and the effects dorsal fin on vortex over delta wing at high angles of attack.
本文研究了Euler方程的高效数值方法及背鳍对三角翼大迎角脱体涡的影响问题。
5)  dorsal/median fin
背鳍/背臀鳍
1.
The undulatory dorsal/median fin propulsion modes as represented by amiiform and balistiform fish are of great significance for bionic propulsion research, particularly for the design and control of underwater vehicles, which are generally employed at slow speeds, offering greater maneuverability and better propulsive efficiency.
以弓鳍目和鳞鲀科鱼类为代表的背鳍/背臀鳍波动推进模式对于水下仿生推进器研制具有相当重要的参考价值。
6)  dorsal fin spine
背鳍条
1.
The annuli on scale,opercular,dorsal fin spine,vertebra and cleithrum of Tor(Folifer) Brevifilis Brevifilis Peter were observed carefully and also the age of the species was diagnosed on the basis of 316 specimens collected respectively from the Qingshui River and the Duliu River in Guizhou,China.
根据分别采集于贵州清水江和都柳江的316例瓣结鱼标本,观察了瓣结鱼鳞片、主鳃盖骨、背鳍条、脊椎骨和匙骨等5种材料的年轮特征并进行了瓣结鱼的年龄鉴定。
补充资料:背鳍
      在小型军用飞机的机身上从凸起的座舱罩后面一直向后延伸到垂直尾翼根部的突出部分。背鳍可以改善座舱罩后部的流线型,减小飞机阻力,还可增加机身后部侧向投影面积,使侧力中心后移,从而改善飞机的航向稳定性。背鳍内的空间经常用来布置飞机操纵系统、电缆和其他管路系统或安装小型设备。背鳍横断面大体呈半椭圆形,采用可拆卸的结构,以便于设备和系统的安装和维修。
  
  

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