Open AccessResearch on Longitudinal dynamic characteristics of flexible waverider based on CFD/CSD/RBD method
Author(s) -
Yang Shang,
Ruhao Hua,
Xianxu Yuan,
Zhigong Tang,
Zhengtao Wang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1786/1/012022
Subject(s) - computational fluid dynamics , longitudinal static stability , rigidity (electromagnetism) , lift (data mining) , drag , lift to drag ratio , morphing , mechanics , stiffness , hypersonic speed , trimming , coupling (piping) , deformation (meteorology) , structural engineering , aerodynamics , computer science , engineering , materials science , physics , mechanical engineering , computer vision , composite material , data mining
The shape of hypersonic aircrafts represented by the waveriders is becoming more slender and flatter, thereby greatly reducing the structural rigidity of the aircrafts. This innovation is applied to satisfy the demand of long-range flight. In this paper, the effect of elastic deformation on the trimming and dynamic stability of the waverider was analysed through Computational Fluid Dynamics(CFD)/Computational Structural Dynamics(CSD)/Rigid Body Dynamics(RBD) coupling. The results show that as the decline of structural stiffness, the angle of attack increases and the lift-drag ratio deteriorates when the waverider is trimmed. The elastic deformation makes the dynamic center get forward, and the static stability of waverider becomes poorer. What’s more, the dynamic stability of pitching motion is reduced due to the coupling of rigid-body motion and elastic vibration.