您的位置:首页  > 论文页面

钝尾缘翼型气动特性分析

发表时间:2013-09-30  浏览量:998  下载量:514
全部作者: 程晓龙,马朝臣,老大中,王磊磊,杨策
作者单位: 北京理工大学机械学院;北京理工大学宇航学院
摘 要: 采用计算流体力学软件FLUENT,选用k-ε湍流模型,对钝尾缘风力机叶片翼型TR-4000-2000进行数值模拟计算,研究钝尾缘的使用对翼型气动特性的影响。对相同来流速度不同攻角情况下翼型流场进行定常及非定常模拟计算,分析得出翼型升阻力等气动参数的波动特性、尾缘脱落涡及分离涡周期性运动规律和翼型表面压力随时间的波动特性,并通过频谱分析方法确定翼型升阻力系数波动及翼型表面压力波动同尾缘涡运动之间的对应关系。结果显示:尾缘脱落涡所引起的翼型表面压力波动是造成钝尾缘翼型气动参数变化的主要原因。在此基础上,更好地解释了钝尾缘翼型流场的随流特性及其变化规律,为进一步研究钝尾缘翼型增升减阻、失速控制及流动控制奠定了基础。
关 键 词: 风能;钝尾缘翼型;数值模拟;升阻力特性;压力波动
Title: Analysis on aerodynamic characteristics of blunt trailing edge wind turbine airfoil
Author: CHENG Xiaolong, MA Chaochen, LAO Dazhong, WANG Leilei, YANG Ce
Organization: School of Mechanical Engineering, Beijing Institute of Technology; School of Aerospace Scientific Engineering, Beijing Institute of Technology
Abstract: In this paper, a blunt trailing edge wind turbine airfoil TR-4000-2000 was numerically investigated by the computational fluid dynamics software FLUENT in the case of k-ε turbulent model, and the influence caused by the use of blunt trailing edge on aerodynamic characteristics were studied. Steady and unsteady numerical simulation of airfoil flow field in different attack corner was performed, and the fluctuation characteristics of aerodynamic parameters was obtained, such as lift coefficient, drag coefficient and time-dependent pressure on airfoil surfaces. Besides, the periodic movement of shedding vortex and separation vortex was gained, and the corresponding relationship between fluctuation of lift coefficient, drag coefficient, trailing edge vortex movement and surface pressure fluctuation was determined by the way of frequency analysis. The analytic results showed that the pressure fluctuation on airfoil surface caused by shedding vortex in trailing edge was the main reason of aerodynamic characteristic fluctuation. Based on these researches, an overall explanation was given to the characteristics of fluid field and its transformation rules, which built the foundation for further research such as lift improvement and drag reduction, stall control and flow control.
Key words: wind energy; blunt trailing edge airfoil; numerical simulation; lift and drag characteristic; pressure fluctuation
发表期数: 2013年9月第18期
引用格式: 程晓龙,马朝臣,老大中,等. 钝尾缘翼型气动特性分析[J]. 中国科技论文在线精品论文,2013,6(18):1714-1720.
 
0 评论数 0
暂无评论
友情链接