空气动力学学报Issue(1)：113-119,7.DOI:10.7638/kqdlxxb-2013.0009
低雷诺数下翼型分离流动抽吸控制特性研究
Investigation on characteristics of suction control on separation flow around an airfoil at low Reynolds number
张旺龙 1谭俊杰 1陈志华 2任登凤1
作者信息
- 1. 南京理工大学 能源与动力工程学院，江苏 南京 210094
- 2. 南京理工大学 瞬态物理国家重点实验室，江苏 南京 210094
- 折叠
摘要
Abstract
In order to research the effect of suction coefficients and directions on suction control,and the relationship between effectiveness and cost of suction,a local suction distribution on the upper surface of the NACA0012 airfoil is designed to control the flow separation.The effectiveness of the designed suction distribution is investigated numerically using Roe scheme and LU-SGS implicit scheme with dual-time-stepping technique.The mechanism of suction con-trol is analyzed by comparing the velocity profiles in the boundary layer.The penalty for utilizing suction control is also estimated.The computational results show that the designed suction distri-bution is capable of suppressing the flow separations and improving the aerodynamic perform-ances.With the increase of the suction coefficients,the lift-to-drag ratio increases fast firstly and then decrease slowly,while the maximum increase is about 130%.The analysis of energy consumption shows that the cost for using suction to suppress separation flow is relatively small with an appropriate suction coefficient.The effect of suction angles on suction control is obvious. As the suction angle becomes larger,not only the lift-to-drag ratio increases,but also the cost of suction decreases.These results will further help to provide new ideas and methods for flow control design.关键词
流动控制/附面层抽吸/低雷诺数/翼型绕流/流动分离Key words
flow control/boundary layer suction/low Reynolds number/flow around airfoil/flow separation分类
航空航天引用本文复制引用
张旺龙,谭俊杰,陈志华,任登凤..低雷诺数下翼型分离流动抽吸控制特性研究[J].空气动力学学报,2015,(1):113-119,7.
