P029

Study on the Resistance and Propulsion Performance of Biomimetic

Autonomous Underwater Vehicle

A0074 Jing-Fa Tsai Institute of Naval Architecture and Ocean Engineering, National Taiwan University

A0075 Chung-Wen Lo Institute of Naval Architecture and Ocean Engineering, National Taiwan University

The resistance and propulsion performance of fish-like geometry will

be studied by the observation of carp swimming and two-dimensional

RANS (Reynolds Averaged Navier-Stokes Solver) code. The geometry of

fish-like AUV was obtained by the measurement of two carps. The

swimming motion equation was fitted from the CCD image of a swimming

carp in water tunnel. Then, the RANS code is applied to calculate the

flow field of the fish-like body. The pressure on the surface, the

velocity profile in the boundary, the vorticity of the flow field and

the friction will be used to study the drag-reduction effect and the

propulsion mechanism of the fish-like AUV. Fig.1 shows the vorticity

distribution of the fish-like AUV in thrust mode. And Fig.2 shows the

pressure distribution in the same condition.

 

 

 

 

 

 

 

 

 

Fig.1 The Vorticity Distribution of Fig.2 The Pressure Distribution

fish-like body in thrust of fish-like body in thrust

mode. mode.