سجاد حاجی زاده

Up to now, many studies have been carried out about the propulsion forces produced by the body and tail of dolphins. In this paper, it is tried to accustom reader with kinematics of dolphin’s motions and specially, the role of fins in their swimming by using the results which have been obtained in this field. In the current article, different phases of movement of dolphins in and out of the water have been studied, briefly. According to presented studies, the body has the greatest impact on the drag reduction. Therefore, the streamlined body of the dolphins has been studied. Finally, a global comparison between dolphins and submarines is conducted. In general, the main aim of this study was that by recognizing the movements of dolphins and the role of fins in their swimming be able to implement these functions in submarines and other underwater vehicles.