摘要
通过对不同形状运动尾鳍模型的测力实验,研究了鱼参科鱼类巡游时尾鳍的推进特性。结果表明:模型转动与平动间的相位差对模型受到推力的大小及方向有显著影响,在转动滞后平动90°附近模型受到较大推力。对于五种不同的尾鳍模型,虽然形状各异,但它们受到的平均推力正比于无量纲二阶矩与模型面积的乘积。
The propulsive characteristics of caudal-fins of carangiforna fish in cruise were investigated in an experiment on measurement of the force acting on the oscillating caudal-fin models with different shapes. The results show that the phase angle between the heaving and pitching motions has a significant influence on the magnitude and direction of the thrust on the models. When the pitch motion lags about 1/4 period behind the heaving, the thrust reaches maximum. The results also indicate that for the models with different shapes, the average thrust on each one is proportional to the product of its area and dimensionless 2th moment of the area.
作者
李龙
尹协振
Li, Long[1]; Yin, Xie-Zhen[1]
出处
《实验流体力学》
EI
CAS
CSCD
北大核心
2008年第1期1-5,16,共6页
Journal of Experiments in Fluid Mechanics
基金
国家自然科学基金重点项目(10332040)
中科院知识创新工程重要研究方向(KJCX2SW2L04)资助项目
关键词
鲹科鱼类
巡游
尾鳍形状
测力
面积二阶矩
earangiform fish
cruise
caudal-fin models
force measurement
2th moment of area
