【摘要】 为了探讨海龟翼摆动时产生的流体推进力与摆动频率、幅度以及来流速度之间的关系,对海龟翼在不同工况下进行了数值仿真计算。针对海龟翼在粘性介质中运动,采用滑移网格技术,结合扑翼运动规律,建立扑翼推进数值计算模型,模拟海龟二维剖面翼以特定规律运动时的流体动力特性。通过数值仿真,得出扑翼推进力与摆动频率、摆动幅度以及来流速度之间的关系。经实践证明:翼静水中摆动平均推力随着摆动频率、幅度的增加而增大,且频率较大时随频率增大得更为明显,为下一步扑翼驱动机构设计打下基础,具有一定的实践指导意义。更多还原

【Abstract】 In order to discuss the relationship among the turtle wing swing produces fluid propulsion and swing frequency,amplitude,flow velocity,we simulates the turtle movement in different conditions.Aim at the turtle movement in viscous medium,using sliding grid technology and combining the flapping wing motion law,we established a numerical model of a two-dimensional wing in a certain movement and simulate its hydrodynamic characteristic.Through numerical simulation,we found out the relationship of the flapping wing propulsion among swing frequency,amplitude and flow speed.As proved by practice:flapping wing average thrust in quiescent water increased as swing frequency and amplitude increased,with greater frequency increasing more apparently,which laying a foundation of the next step of the flapping wing driven design,and having a certain practical significance.更多还原