航空科学技术2024，Vol.35Issue(6)：44-50,7.DOI:10.19452/j.issn1007-5453.2024.06.006
展弦比对NACA0012弹性平直机翼颤振临界特性影响研究
Effect of Aspect-ratio on Flutter Critical Characteristics of NACA0012 Flexible Straight Wing
摘要
Abstract
Aspect-ratio is an important parameter in the design of aircraft wings,and studying its influence on the flutter critical characteristics of wings has significant engineering application value.This paper uses the three-dimensional Reynolds Averaged N-S equations and the S-A turbulence model to solve the unsteady aerodynamic forces of high-aspect-ratio NACA0012 flexible straight wings.Combining with the wing dynamic equation established by the modal method,a CFD/CSD flutter time-domain numerical simulation method is developed.This method is employed to study the influence of aspect-ratio on the flutter critical characteristics of the wing.The results indicate that due to the high-aspect-ratio and soft material,the wing has a certain range of vertical static bending deformation.The increase in aspect-ratio does not affect the natural mode shape of the wing,but reduces the modal natural frequency,flutter critical velocity,and flutter frequency.关键词
展弦比/颤振临界特性/弹性平直机翼/模态/数值模拟Key words
aspect-ratio/flutter critical characteristics/flexible straight wing/mode/numerical simulation分类
航空航天引用本文复制引用
余秋阳,徐胜金..展弦比对NACA0012弹性平直机翼颤振临界特性影响研究[J].航空科学技术,2024,35(6):44-50,7.基金项目
航空科学基金(201958058001) （201958058001）
中国空气动力研究与发展中心旋翼空气动力学重点实验室研究开放课题(RAL202204-9) Aeronautical Science Foundation of China(201958058001) （RAL202204-9）
The Rotor Aerodynamics Key Laboratory Foundation of China Aerodynamics Research and Development Center(RAL202204-9) （RAL202204-9）
