%0 Journal Article
%T 水翼振荡运动捕获潮流能的机理研究
%A 谢玉东
%A 王勇
%A 马鹏磊
%A 逯建伟
%J 浙江大学学报(工学版)
%D 2018
%R 10.3785/j.issn.1008-973X.2018.01.010
%X 为了揭示水翼发生振荡运动而捕获潮流能的机理，根据流体力学的基本理论，建立水翼振荡运动的模型.利用商用软件ANSYS Fluent对水翼的运动过程进行数值模拟，分析水翼运动对周围流场的影响，讨论水翼的运动参量、尺度参数等对水翼的水动力特性和能量捕获性能的影响规律，获得水翼在流体作用下的动力响应特性.结果表明：水翼的捕能总效率随运动参量变化的过程存在拐点，将水翼的运行参数设置在最高效率点对应的参数下，能够减小瞬时升力系数、瞬时阻力系数、瞬时功率系数各系数曲线的振荡突变现象，但该参数设置下的水翼功率输出未必能够达到最大；升沉运动捕获的能量与水翼厚度呈正相关，俯仰运动捕获的能量与水翼厚度呈负相关；水翼几何参数对水翼工作性能的影响程度与流体黏性的影响密切相关.</br>Abstract: An oscillating motion model of the hydrofoil was developed based on hydrodynamic principles in order to elucidate the energy-capturing mechanism of the oscillating motion of the hydrofoil. The commercial software ANSYS Fluent was used to conduct numerical simulations of hydrofoil motion, and the effect of hydrofoil motion on the surrounding flow field was analyzed. The influences of the motion and dimension parameters of the hydrofoil on the hydrodynamic characteristics and the energy-capturing efficiency of the hydrofoil were analyzed. The dynamic response characteristics of the hydrofoil were obtained. Results show that there is a break point in the process of the energy-capturing efficiency changes with the motion parameters of the hydrofoil. Setting the motion parameters to be the values corresponding to the peak efficiency can eliminate the oscillation shocks of normal variation curves of the instantaneous lift coefficient, instantaneous drag coefficient and instantaneous power coefficient. The hydrofoil power output corresponding to the peak efficiency may not be at its maximum. The energy captured by heaving motion is positively related to the hydrofoil thickness, while the energy captured by pitching motion is negatively related to the hydrofoil thickness. The effect of the dimension parameters on the characteristics of the hydrofoil is related to the influence coefficient of fluid viscosity.
%U http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2018.01.010