基于鳐鱼游动的三维动波浪壁自主推进流动控制机理研究

项目名称： 基于鳐鱼游动的三维动波浪壁自主推进流动控制机理研究

项目编号： No.11302071

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 信志强

作者单位： 河海大学

项目金额： 22万元

中文摘要： 在自然界中，生物通过表面的主动或被动变形，能完美地实现流动控制，拥有人造运载工具无可比拟的出色运动性能。但是目前三维波动物面的流体力学机理仍是不清楚的。本项目以波动推进鳐鱼游动为基础和启发，系统开展"三维动波浪壁自主推进流动控制机理研究"。本研究将结合并行三维自适应多重网格有限体积法、内置边界法和VOF方法，发展能够模拟三维动边界问题的计算流体软件包，组合CFD和生物运动动力学控制实现生物自主运动模拟。首先研究类似飞毯的三维行波壁自主推进时波形、波频、波长和波的传播方向等变化引起的受力和涡结构变化，深入分析三维行波壁流动控制机理。其次在鳐鱼的运动学数据基础上，对三维波动推进鳐鱼的游动机理进行系统分析，揭示自然界生物采用动波浪壁高效游动的秘密。这些结果必将增强对动波浪壁流动控制机理的认识，促进动物面流动控制应用的发展，并对开发高性能运载工具和水下仿生机器人，具有重要的实际意义和启发。

中文关键词： 三维动波浪壁；自主运动；内置边界法；自适应网格；涡动力学

英文摘要： In nature, animals are capable of controlling flow using active or passive deformation of body surface, and have more excellent movement performance than man-made vehicles. However, the fluid mechanisms of the three-dimensional wave wall are still unknown.Based on swimming of undulatory rays, the flow control mechanisms of the three dimensional self-propelled traveling wave are investigated in this study, with a 3D computational fluid dynamics package, which includes the immersed boundary method and the volume of fluid method, the adaptive multi-grid finite volume method, and the control strategy of swimming and flying. First, the impacts of the waveform, wave frequency, wavelength and direction of wave propagation of the 3D traveling wave like flying carpet on the force applied on body and wake structure are studied, and the depth analysis of flow control mechanism of three-dimensional traveling wave wall are carried out. Finally, combined with the kinematics data of rays, the hydrodynamics of self-propelled swimming of undulatory rays are simulated, in order to reveal the mechanisms of efficient swimming of rays using the traveling wave. These results will elucidate the fluid mechanism of the flow control of the moving wave wall, promote the applications development of moving surface flow control and have imp

英文关键词： 3D traveling wave wall；self-propelled motions；immersed boundary method；adaptive multi-grid；vortex dynamics