Nonsinusoidal motion effect on a self-propelled heaving foil

Nonsinusoidal motion effect on a self-propelled heaving foil

Blog Article

In order to Brackets explore the mechanism of bionic propulsion and bionic robots, to make up for the limitations of traditional propulsion with a uniform incoming flow, numerical methods are used to couple fluid dynamics and flapping foil motions, and a flapping-fluid coupling self-propulsion calculation model is established in this paper.K is used as the waveform adjustment parameter to change the waveform from triangle wave to sine wave and square wave.The self-propulsion performances of non-sinusoidal heave motion under two frequency-heaving amplitude combinations are numerically simulated to study the influence of different motion waveforms on self-propulsion velocity, efficiency and flow field structure in still water.The results show that the non-sinusoidal waveform has a great influence on the self-propulsion.

With the increase of K, the closer to the L-Glutathione square wave, the more violent the speed oscillation, the faster the starting acceleration, the greater the forward displacement and the average speed, as K decreases, self-propulsion efficiency and energy utilization continue to increase.The results of this study have certain guiding significance for the design of bionic underwater vehicles.