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Unsteady Transonic Aerodynamics in Frequency Domain and Calculation of Flutter Characteristics of Aircraft
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English
Abstract
This paper describes a finite-difference method for unsteady transonic flow computation in frequency domain and transonic flutter prediction of complete aircraft configurations. The unsteady TSD equation as well as the boundary conditions are split into the in-phase and out-of-phase components in frequency domain by a nonlinear harmonic averaging technique. The resulting equations are solved by a steady flow algorithm.
The unsteady pressure distributions for a rectangular wing and the ONERA M6 wing are analyzed and compared with other results to verify the code.
The flutter characteristics for the AGARD I-445.6 wing, a cropped delta wing and a fighter configuration are computed and the results are discussed.
Authors
Citation
Greco, P., Lan, C., and Lim, T., "Unsteady Transonic Aerodynamics in Frequency Domain and Calculation of Flutter Characteristics of Aircraft," SAE Technical Paper 951182, 1995, https://doi.org/10.4271/951182.Also In
References
- Edwards, J. W. Malone, J. B. “Current Status of Computational Methods for Transonic Unsteady Aerodynamics and Aeroelastic Applications,” AGARD-CP-507 March 1992
- Murman, E. M. Cole, J. D. “Calculation of Plane Steady Transonic Flows,” AIAA Journal 9 January 1971 114 121
- Ballhaus, W. F. Goorjian, P. M. “Implicit Finite-Difference Computations of Unsteady Transonic Flows about airfoils,” AIAA Journal 15 December 1977 1728 1735
- Cunningham, H. J. Batina, J. T. Bennett, R. M. “Modern Wing Flutter Analysis by Computational Fluid Dynamics Methods,” NASA TM-100531 January 1988
- Batina, J. T. Seidel, D. A. Bland, S. R. Bennett, R. M. “Unsteady Transonic Flow Calculations for Realistic Aircraft Configurations,” Journal of Aircraft 26 1 January 1989 21 28 March 1987
- Batina, J. T. “An Efficient Algorithm for Solution of the Unsteady Transonic Small-Disturbance Equation,” Journal of Aircraft 25 7 July 1988 598 605 December 1986
- Edwards, J. W. “Computational Aeroelasticity Challenges and Resources,” Transonic Unsteady Aerodynamics and Aeroelasticity, NASA CP 3022 1989 631 637
- Yates, E. C., Jr. “AGARD Standard Aeroelastic Configurations for Dynamic Response I-Wing 445.6,” AGARD-R-765 July 1988
- Sandford, M. C. Ruhlin, C. L. Abel, I. “Transonic Flutter Study of a 50.5° Cropped-Delta Wing with Two Rearward-Mounted Nacelles,” NASA TN D-7544 1974
- Rodden, W. P. Giesing, J. P. Kalman, T. P. “New Developments and Applications of the Subsonic Doublet-Lattice Method for Nonplanar Configurations,” AGARD-CP-80-71 1971
- Rowe, W. S. Cunningham, H. J. “On the Convergence of Unsteady Generalized Aerodynamic Forces,” Journal of Aircraft 21 6 June 1984 420 427
- Hounjet, M. H. L. “Calculation of Unsteady Subsonic and Supersonic Flow About Oscillating Wings and Bodies by New Panel Methods,” Paper No. 89-009 European Forum on Aeroelasticity and Structural Dynamics Aachen FRG April 1989 85 104
- Chen, P. C. Liu, D. D. “A Harmonic Gradient Method for Unsteady Supersonic Flow Calculations,” Journal of Aircraft 22 May 1985 371 379
- Nayfeh, A. H. Mook, D. T. “Nonlinear Oscillations,” John Wiley & Sons Publication 1979
- Hwang, H. Lan, C. E. “Direct Solution of Unsteady Transonic Flow Equations in Frequency Domain,” AIAA Paper 89-0641 January 1989
- Krupp, J. A. “The Numerical Calculation of Plane Study Transonic Flows Past thin Lifting Airfoils,” Boeing Scientific Research Laboratories June 1971
- Harder, R. L. Desmarais, R. N. “Interpolation Using Surface Splines,” Journal of Aircraft 9 2 Feb. 1972
- Dowell, E. H. A Modern Course in Aeroelasticity Sijthoff & Noordhoff Maryland 1978 38 46
- Edwards, J. W. Bland, S. R. Seidel, D. A. “Experience with Transonic Unsteady Aerodynamic Calculations,” NASA TM 86278 August 1984
- Whitlow, W., Jr. “A Program for Solving the General-Frequency Unsteady Transonic Small Disturbance Equation,” NASA TM 85723 November 1983
- Sacher, P. “Test Case for Inviscid Flow Field Method,” AGARD-AR-211 1985 7 1 7 37
- Batina, J. T. “Unsteady Transonic Small-Disturbance Theory Including Entropy and Vorticity Effects,” Journal of Aircraft 26 6 June 1989
- Pitt, D. M. Fuglsang, D. F. “Aeroelastic Calculations for Fighter Aircraft Using the Transonic Small Disturbance Equation,” AGARD-CP-507 March 1992
- Wong, Y. S. Lee, B. H. K. Murty, H. S. “A Time-Linearization Approach for Unsteady Transonic Flows,” AGARD CP-507 1992
- Bennett, R. M. Batina, J. T. Cunningham, H. J. “Wing-Flutter Calculations with the CAP-TSD Unsteady Transonic Small-Disturbance Program,” Journal of Aircraft 26 9 September 1989 876 882