风沙环境下腐蚀翼型的动态失速研究
Research on Dynamic Stall of Corroded Airfoil in Wind-sand Environment
王龙 1许勇彬 1王小龙 1吴浩东1
作者信息
- 1. 安徽理工大学机电工程学院,安徽 淮南 232001
- 折叠
摘要
目的 针对风沙环境下腐蚀翼型的动态失速问题.方法 采用欧拉双流体计算方法对S802翼型进行动态失速模拟.在来流风速为10m/s条件下,研究不同振荡频率、沙粒直径及沙粒体积分数对腐蚀翼型动态失速的影响,得到不同工况下S802翼型气动力变化规律.结果 在动态失速过程中,翼型的升力随沙粒体积分数的增大而增大,增幅约为9％;在研究沙粒直径范围内,沙粒大小对翼型的失速影响较小,随着沙粒直径的增大,升力大小及变化幅度范围未发生显著变化;此外,随着振荡频率的增加,翼型绕流流场的非定常效应愈加显著,翼型的升力变化范围有所增大,翼型表面的压力分布随振荡频率快速变化.结论 研究结果对于恶劣环境下风力机叶片的维护具有重要指导意义.
Abstract
Objective the dynamic stall problem of corroded airfoil in wind-sand environment.Methods The dynam-ic stall of S802 airfoil was simulated Euler two-fluid method.The effects of different oscillation frequencies,sand diameter and sand volume fraction on the dynamic stall of corroded airfoil were studied under the condition of wind speed of 10m/s,and the variation law of aerodynamic force of S802 airfoil under different working conditions was obtained.Results In the process of dynamic stall,the lift of the airfoil increase with the increase of sand vol-ume fraction.he sand size ha little effect on the stall of the airfoil.In addition,with the increase of the oscillation frequency,the unsteady effect of the flow field around the airfoil becmemore significant,and the lift variation range of the airfoil increase.The pressure distribution on the airfoil surface change rapidly with the oscillation fre-quency.Conclusion The research results have important guiding significance for the maintenance of wind turbine blades in harsh environments.
关键词
风沙环境/腐蚀翼型/动态失速/气动性能Key words
sandy environment/corrosion airfoil/dynamic stall/aerodynamic performance引用本文复制引用
基金项目
安徽省自然科学基金资助项目(1708085QE123)
出版年
2024
NETL
NSTL
万方数据