仿生推进装置翼盘变速运动的数值仿真与试验研究

根据水母游动原理扩展设计了一种仿生推进装置,该装置以曲柄滑块机构驱动剪式结构串联体、两端仿生合页式翼盘,实现大行程直线往复运动的仿生推进.在数值分析的基础上,根据仿生推进装置运动的特点,运用直线位移与拉压力传感器,对翼盘在水中运动时的推进力及运动位移进行测试和数据采集.考虑运动过程中翼盘速度变化,运用FLUENT软件对不同张角的翼盘产生的推进力进行数值仿真.通过仿真与试验分析,并以推进力最大化为原则,确定了翼盘最大张角为160°,推进力仿真值与实际测试值基本吻合,初步验证了所提出仿真方法准确性.

Numerical Simulation and Experimental Investigation on Wing Disc Variable Speed Motion of a Biomimetic Propulsion Device

A kind of biomimetic propulsion unit was proposed based on the mechanism of swimming stroke of jellyfish.In order to achieve biomimetic propulsion of large stroke reciprocating motion, the unit adopts slider-crank mechanism to drive serial mechanism of scissor-like element and the biomimetic foils.Based on the numerical analysis and the features of biomimetic propulsion, test about displacement and propulsion of the foil moving in water was carried out, by using beeline displacement sensor and pull/pressure sensor. Taking iuto account the velocity change when foil moving, software FLUENT was applied to get the numerical simulation of wing disc propulsion with different opening angles. The comparison between simulation output and test results indicates that the simulation result is basically agreement with the test value, and the maximum propulsion of wing disc is obtained when the foil opening angle is 160°. So this biomimetic method is preliminarily validated.