Experiments on propulsive characteristics of the caudal-fin models of carangiform fish in cruise
Experiments on propulsive characteristics of the caudal-fin models of carangiform fish in cruise
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发表时间：
2008
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通讯作者：
Yin Xie-zhen
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作者：
Yin Xie-zhen
通过对不同形状的尾鳍模型的受力测量，研究了巡航状态下鲤鱼尾鳍的推进特性。结果表明，垂荡运动与纵摇运动的相位角对尾鳍模型所受的推力大小和方向有显著影响。当纵摇运动滞后于垂荡运动约1/4周期时，尾鳍模型的推进力随垂荡运动的增大而增大。当纵摇运动滞后于垂荡运动约1/4周期时，尾鳍模型的推进力随垂荡运动的增大而增大。当纵摇运动滞后于垂荡运动约1/4周期时，尾鳍模型的推进力随垂荡运动的增大而增大。当纵摇运动滞后于垂荡运动约1/4周期时，尾鳍模型的推进力随垂荡运动的增大而增大。结果还表明，对于不同形状的模型，每个模型上的平均推力与其面积和面积的无量纲二阶矩的乘积成正比。
The propulsive characteristics of caudal-fins of carangiform 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.