• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Study on hydrodynamics of a flexible fishlike foil undulating in wall effect
【24h】

Study on hydrodynamics of a flexible fishlike foil undulating in wall effect

机译：墙壁效应中柔性鱼类箔的流体动力学研究

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper aims to investigate the hydrodynamics of a flexible fishlike foil undulating near the vertical sidewall by using numerical simulation. To achieve the research target of this paper, an immersed boundary-lattice Boltzmann method (IB-LBM) was proposed for high Reynolds number fluid flow simulation. The influences of the clearance (0.2L? ≤?d? ≤?0.8L , L is the chord length of the fishlike foil) between the fishlike foil and sidewall, Strouhal number (0.1? ≤?St? ≤?0.5), and wavelength (0.6L? ≤?λ? ≤?1.4L ) on the hydrodynamic characteristics and power extraction efficiency were studied. The results indicate that the wall effect on forces increase with increasing St and λ , but it is opposite for the power extraction efficiency. As compared to the case of out of wall effect, the fishlike foil swims near the sidewall has an effect of improving thrust and it will reduce or increase the power extraction efficiency in some specified cases. Moreover, an interesting phenomenon with pair arrayed vortices, pair arrayed low-pressure centers and pair arrayed high-velocity centers are observed due to the presence of sidewall.
机译：本文旨在通过使用数值模拟来研究垂直侧壁附近靠近垂直侧壁附近的柔性鱼状箔的流体动力学。为了实现本文的研究靶标，提出了一种浸入的边界晶格玻璃螺柱方法（IB-LBM），用于高雷诺数流体流模拟。间隙的影响（0.2℃，L≤≤≤≤≤≤≤≤≤0.8， l是鱼类箔和侧壁之间的鱼状箔的弦长），Strouhal数（ 0.1 ≤α≤α≤≤≤≤≤≤0.5），波长（0.6，0.6，0.6，0.6，≤α≤≤≤≤≤≤≤≤≤≤≤1.4升），在流体动力学特性和功率提取效率下研究过。结果表明，随着电力提取效率的增加，壁对力的影响随着电力提取效率而增加。与墙壁效应外的情况相比，鱼类般的箔在侧壁附近游泳有改善推力的效果，并且它将减少或提高一些特定情况下的功率提取效率。此外，由于侧壁存在，观察到具有对阵列涡流的有趣现象，配对阵列的低压中心和对阵列的高速中心。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号