Mechanics in Engineering ›› 2010, Vol. 32 ›› Issue (3): 26-30.DOI: 10.6052/1000-0879-2009-236

• Application study • Previous Articles     Next Articles

THE NUMERICAL STUDY OF INFLUENCE OF BODY SHAPE ON CARANGIFORM

JING Jun XU Jian LIANG Zhonggang   

  • Received:2009-06-17 Revised:2009-07-09 Online:2010-06-08 Published:2010-06-08

Abstract: The carangiform propulsion has been paid much attention in recent years. In nature, the fish may have many kinds of tail shape, but only a few body shapes. This paper studies the influence of the body shape on the carangiform propulsion. Two body models are used in numerical simulation: model A, the fish normal body shape; model B, the submarine shape. The tail takes a crescent shape. The strouhal number ($St$) is chosen as the main parameter, and the combined translational-rotational oscillations are taken as the motion of tail. The hydrodynamical force is calculated by the software FLUENT. The results show that the body shape does affect the carangiform propulsion, the fish body shape is beneficial to cruising as a result of the nature evolutional selection.

Key words: bionic propulsion, body shape, FLUENT, Strouhal number, combined oscillations