不同厚度不同系列波状运动翼型的能量吸收特性

Energy Extraction Characteristics for the Airfoils of Traveling Wave Motion with Different Thickness and Series

为改善做行波运动的翼型的能量吸收特性,基于计算流体力学方法,分析波长(0. 6L～1. 4L,L为中弧线长度)、振幅(0. 02L～0. 1L)与无量纲波速(0. 1～0. 9)对做行波运动的NACA4、NACA63与NACA65系列不同最大厚度的翼型以及行波运动板的能量吸收特性的影响。研究表明:当运动参数相同时,同一系列翼型的获能效率随最大厚度的增大而减小,且行波板的获能效率最高;当行波振幅与无量纲波速一定时,厚度相同的不同系列翼型的获能效率均随波长的增大而减小,且不同系列翼型的获能效率基本相当;当行波波长与无量纲波速一定时,厚度相同的不同系列翼型的获能效率均随振幅的增大而增大;当行波波长与振幅一定时,厚度相同的不同系列翼型的获能效率均随无量纲波速的增大而先增大后减小,且在无量纲波速c=0. 45左右达到最大值。

In order to improve the energy extraction characteristics of the airfoil with traveling wave mo-tion. Based on the computational fluid dynamics method,the calculation is carried out to obtain the energy extraction characteristics of the plate and the airfoils with traveling wave motion of different maximum thickness of NACA4, NACA63 and NACA65 series under different independent variables of wavelength (0.6L^1.4L,is the length of the medium arc) ,amplitude(0. 02L^0.1L) and dimensionless wave ve- locity(0.1 ~0.9) in this paper. The results show that the energy extraction efficiency of the same series airfoils decreases with the increase of the maximum thickness under the same motion parameters, and the energy extraction efficiency of the waving plate is the highest. When the amplitude and dimensionless wave velocity of the traveling wave are constant,the energy extraction efficiency of the airfoils under dif-ferent series with the same thickness decreases with the increase of the wavelength, and it is essentially the same for different series. When the wavelength and dimensionless wave velocity are constant,it increa-ses with the increase of the amplitude. When the wavelength and amplitude are constant,it increases first and then decreases with the increase of the wavelength, and reaches the maximum when the dimensionless wave velocity c =0.45.