空气动力学学报2018，Vol.36Issue(2)：213-228,16.DOI:10.7638/kqdlxxb-2018.0035
面向层流减阻设计的转捩预测方法研究
Transition prediction methods towards significant drag reduction via laminar flow technology
摘要
Abstract
Efficient and reliable transition prediction methods are of great significance for the development of drag reduction technology through large extension of laminar flow over aircraft.To meet the strong need of engineering design of future laminar aircraft,this article focuses on the development and investigation of three types of transition prediction methods:1) a dual eN method based on linear stability analysis;2) a γ-Reθ model based on localized flow variables;3) a novel method combining dynamic model decomposition (DMD) and eN method.These methods are validated by the transition predictions for flows over the DLR-F4 wing-body configuration,the sickle-shaped wing,and the natural-laminar-flow airfoil NLF0416,etc.The results show that the predicted transition points or lines are in good agreement with the experimental data.The dual eN-method,served as an example of the transition prediction methods,is further demonstrated for aerodynamic design of a natural-laminar-flow wing for short-and medium-range transport aircraft.Remarkable drag reduction has been achieved,which shows that the developed transition prediction methods offer great potential for engineering applications.关键词
转捩预测方法/自然层流/eN方法/γ-Reθ转捩模型/动模态分解Key words
transition prediction method/natural laminar flow/eN method/γ-Reθ model/dynamic model decomposition分类
航空航天引用本文复制引用
宋文萍,吴猛猛,朱震,吴涛,聂晗,范天伦,韩忠华..面向层流减阻设计的转捩预测方法研究[J].空气动力学学报,2018,36(2):213-228,16.基金项目
航空科学基金(2016ZA53011) （2016ZA53011）
CFD前沿技术项目(2015-F-016) （2015-F-016）
