Aerodynamic characteristics of a pitching airfoil with leading-edge morphing

作     者：Chaoyuan WEN Yuting DAI Yuntao XU Chao YANG 

作者机构：School of Aeronautic Science and EngineeringBeihang UniversityBeijing 100191China Tianmushan LaboratoryHangzhou 311115China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2024年第37卷第7期

页      面：81-92页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：co-supported by the National Natural Science Foundation of China(No.11672018) the Fundamental Research Funds for the Central Universities,China(No.YWF-23-SDHK-L-002) 

主　　题：Aerodynamics Computational fluid dynamics Leading-edge morphing OpenFOAM Dynamic stall Dynamic mesh 

摘      要：This paper focuses on the effect of the phase offset of Leading-Edge(LE)morphing on the aerodynamic characteristics of a pitching NACA0012 *** an unstretched camber and using polynomial interpolation,an explicit expression for LE nonlinear morphing is proposed and implemented for the large pitching motion of the *** field results and aerodynamic forces are obtained by solving the unsteady Reynolds-averaged Navier-Stokes equations for both the airfoil’s pitching motion and LE ***,the index of instantaneous aerodynamic power is used to quantify the work done by the airflow in a dynamic *** to the instantaneous aerodynamic power and energy map,which denotes the energy transfer between the airfoil’s oscillation and flow field,the airfoil is subject to stall *** results show that LE morphing with an optimal phase offset of 315°reduces the energy extraction from the flow field,suppressing the stall flutter *** optimal phase offset is effective at different pitching axis positions of the *** results signify that LE morphing can suppress stall flutter by advancing the occurrence of the first LE vortex and increasing the nose-down moment during the upstroke period.