A high-efficiency aerothermoelastic analysis method

• Published in: Science China. Physics, mechanics & astronomy Vol. 57; no. 6; pp. 1111 - 1118
• Main Authors: Wan, ZhiQiang, Wang, YaoKun, Liu, YunZhen, Yang, Chao
• Format: Journal Article
• Language: English
• Published: Heidelberg Science China Press 01.06.2014; Springer Nature B.V
• Subjects: Aerodynamic forces; Aerodynamic loads; Aspect ratio; Astronomy; Classical and Continuum Physics; Conduction heating; Conductive heat transfer; Deformation effects; Flight time; Flight vehicles; Flutter; Flutter analysis; Heat; Hypersonic aircraft; Hypersonic flight; Hypersonic flow; Lift devices; Lifting surfaces; Observations and Techniques; Physics; Physics and Astronomy; Temperature distribution; Thermal analysis; Transient heat conduction; Vibration; Wings (aircraft); 傅立叶定律; 升力面理论; 双向耦合; 模态方法; 气动弹性; 瞬态热传导; 高超声速飞行器; 高超音速飞行器; flutter; two-way coupling; aerothermoelastic; unified hypersonic lifting surface theory; piston theory
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-014-5410-8

In this paper, a high-efficiency aerothermoelastic analysis method based on unified hypersonic lifting surface theory is estab- lished. The method adopts a two-way coupling form that couples the structure, aerodynamic force, and aerodynamic thermo and heat conduction. The aerodynamic force is first calculated based on unified hypersonic lifting surface theory, and then the Eckert reference temperature method is used to solve the temperature field, where the transient heat conduction is solved using Fourier＇s law, and the modal method is used for the aeroelastic correction. Finally, flutter is analyzed based on the p-k method. The aerothermoelastic behavior of a typical hypersonic low-aspect ratio wing is then analyzed, and the results indicate the fol- lowing： （1） the combined effects of the aerodynamic load and thermal load both deform the wing, which would increase if the flexibility, size, and flight time of the hypersonic aircraft increase; （2） the effect of heat accumulation should be noted, and therefore, the trajectory parameters should be considered in the design of hypersonic flight vehicles to avoid hazardous condi- tions, such as flutter.