Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

Transonic Aeroelastic Analysis of a Airfoil with Friction Damping

마찰 감쇠를 고려한 에어포일의 천음속 공탄석 해석

  • 유재한 (한국한공우주연구원 발사체미래기술팀) ;
  • 이인 (한국과학기술원 항공우주공학)
  • Received : 2010.07.07
  • Accepted : 2010.10.22
  • Published : 2010.11.01
Download PDF
⟨ Previous Next ⟩

Abstract

For the aeroelastic analysis of a wing with friction damping, coupled time integration method was used to obtain time responses in the subsonic and transonic regions. To take into account aerodynamic nonlinearity induced by shock wave on the lifting surface, transonic small disturbance equation with in-phase periodic boundary condition was used for unsteady aerodynamic calculation. For 2-DOF airfoil system with displace-dependent friction dampers, the effects of normal load slope and Mach number on flutter boundary were investigated.

마찰 감쇠가 있는 공탄성 해석을 위하여, 연계 시간 적분법을 사용하여 아음속/천음속 영역에서 공탄성 응답을 구하였다. 양력면에 발생하는 충격파에 의한 공기역학적 비선형성을 고려하기 위하여 동위상 주기 경계 조건이 적용된 미소교란 방정식을 비정상 공기력 계산에 적용하였다. 변위 종속적인 마찰 감쇠기가 있는 2차원 에어포일 시스템에 대하여 플러터 경계에 대한 수직력의 기울기와 마하수의 영향을 살펴보았다.

Keywords

References

  1. Isomura, K., and Giles, M. B., "A Numerical Study of Flutter in a Transonic Flow", Journal of Turbomachinery, V. 120, 1998, pp. 500-507. https://doi.org/10.1115/1.2841746
  2. Ji, S., and Liu, F., "Flutter Computation of Turbomachinery Cascades Using a Parallel Unsteady Navier-Stokes Code", AIAA Journal, V. 37, N. 3, 1999, pp. 320-327. https://doi.org/10.2514/2.733
  3. Gnesin, V. and Rzadkowski, R., "A Coupled Fluid-Structure Analysis For 3-D Inviscid Flutter of IV Standard Configuration", Journal of Sound and Vibration, V. 251, N. 2, 2002, pp. 315-327. https://doi.org/10.1006/jsvi.2001.3981
  4. Whiteman, W. E. and Ferri, A. A., "Suppression of Bending-Torsion Flutter Through Displacement-Dependent Dry Friction Damping", AIAA Journal, V. 37, N. 1, 1999, pp. 79-83. https://doi.org/10.2514/2.667
  5. Carstens, V., and Belz, J., "Numerical Investigation of Nonlinear Fluid-Structure Interaction in Vibrating Compressor Blades", Journal of Turbomachinery, 2001, V. 123, pp. 402-408. https://doi.org/10.1115/1.1354138
  6. Yang, B. D., Chu, M. L., and Menq, C. H., “Stick-Slip-Separation Analysis and Non-linear Stiffness and Damping Characterization of Friction Contacts Having Variable Normal Load”, Journal of Sound and Vibration, V. 210, N. 4, 1998, pp. 461-481. https://doi.org/10.1006/jsvi.1997.1305
  7. Yoo, J. H., Kim, D. H., and Lee, I., “Angle-of-attack Effect on Transonic and Low-supersonic Aeroelasticity of a Wing-Box Model”, Journal of Aircraft, V.39, N. 5, 2002, pp. 906-908. https://doi.org/10.2514/2.3017
  8. Messiter, A. F. and Adamson Jr., T. C., "Transonic Small-Disturbance Theory for Lightly Loaded Cascades", AIAA Journal, V. 19, N. 8, 1981, pp. 1047-1054. https://doi.org/10.2514/3.7841