This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Numerical Simulations of Tandem-Airfoil Aerodynamics
Annotation ability available
Sector:
Language:
English
Abstract
Analysis of tandem wing aircraft configurations has been of interest to the aerospace community since the early 1970's. The theoretical performance gains from the use of two similarly-sized wings make this unusual configuration an enticing option for future aircraft designs. In this investigation, a two-dimensional Navier-Stokes analysis previously developed for internal flow geometries has been extended to external flow geometries. The modified flow analysis was validated against two sets of experimental data. A series numerical simulations were then performed for a tandem-airfoil configuration in which the stagger (chord-wise distance between the mid-chord of each airfoil) was varied. At each stagger position, the aerodynamic flow field was investigated at several negative and positive incidence angles. The predicted results indicate that (for moderate-to-large stagger distances) the aft airfoil performs similar to the fore airfoil at lower angles of attack. At higher angles of attack the lift-to-drag ratio of the fore airfoil is much greater than that of the aft airfoil. Decreasing the stagger distance increases the drag on the aft airfoil, while the fore airfoil experiences an expanded drag bucket and an increased lift-to-drag ratio.
Recommended Content
Technical Paper | Study of Periodic Gust Loads on Airfoils |
Technical Paper | Spanwise Distribution of Lift and Drag at High Angles of Attack |
Technical Paper | Application of Very Thick BLC Airfoils to a Flying Wing Type Transport Aircraft |
Topic
Citation
Fanjoy, D. and Dorney, D., "Numerical Simulations of Tandem-Airfoil Aerodynamics," SAE Technical Paper 961295, 1996, https://doi.org/10.4271/961295.Also In
References
- Rokhsaz, K. Selberg, B. P. “Dual and Single Wing Design Integration - Optimized for Decalage Angle, Re, and M(cr),” AIAA Paper 84-2161, 2nd Applied Aerodynamics Conference Seattle, WA 1984
- Bottomley, J. “Tandem Wing Aircraft,” Aerospace UK 4 October 1977 12 20
- Garrick, I. “Potential Flow About Arbitrary Biplane Wing Sections,” 1937
- Bottomley, J. “The Tandem-Wing Concept Applied to Modern Transports,” Aeronautical Journal 78 November 1974
- Brown, W. E. Timmerman, D. “Benefits of Composite Structure for the Tandem Wing Advanced Technology Tactical Transport,” AIAA/AHS/ASEE Aircraft Design Systems and Operation Meeting, AIAA Paper 91-3167 Baltimore, MD 1991
- Wolkovitch, J. “The Joined Wing - An Overview,” AIAA Journal of Aircraft 23 3 March 1986 161 178
- Henderson, W. P. Huffman, J. K. “Aerodynamic Characteristics of a Tandem Wing Configuration at a Mach Number of 0.30,” October 1975
- Scharpf, D. F. “An Experimental Study of Closely Coupled Tandem Wing Configurations at Low Reynolds Numbers,” The University of Notre Dame 1989
- Tuncer, I. H. Platzer, M. F. “Analysis of Unsteady Airfoil Interference Effects Using a Zonal Navier-Stokes Solver,” AIAA Paper 95-0307, 33rd Aerospace Sciences Meeting and Exhibit Reno, NV 1995
- Dorney, D. J. Davis, R. L. Edwards, D. E. Madavan, N. K. “Unsteady Analysis of Hot Streak Migration in a Turbine Stage,” AIAA Journal of Propulsion and Power 8 2 March-April 1992 520 529
- Dorney, D. J. Davis, R. L. “Numerical Simulations of ‘Hot Spot’ Alleviation Using Film Cooling,” AIAA Journal of Propulsion and Power 9 3 May-June 1993 329 336
- Dorney, D. J. Verdon, J. M. “Numerical Simulations of Unsteady Cascade Flows,” ASME Journal of Turbomachinery 116 4 October 1994 665 675
- Abbott, I. H. Von Doenhoff, A. E. “Theory of Wing Sections,” Dover Publications, Inc. New York, N. Y. 1959
- Holst, T. L. “Viscous Transonic Airfoil Workshop Compendium of Results,” AIAA Paper 87-1460 Honolulu, HI 1987
- Baldwin, B. S. Lomax, H. “Thin-Layer Approximation and Algebraic Model for Separated Turbulent Flows,” AIAA Paper 78-257, 16th Aerospace Sciences Meeting Huntsville, AL 1978
- Dhawan, S. Narasimha, R. “Some Properties of Boundary Flow During Transition from Laminar to Turbulent Motion,” Journal of Fluid Mechanics 3 1958 418 436
- Chakravarthy, S. R. Osher, S. “Numerical Experiments with the Osher Upwind Scheme for the Euler Equations,” AIAA Paper 82-0975 1982
- Steinke, R. J. “Application of a Two-Dimensional Unsteady Viscous Analysis Code to a Supersonic Throughflow Fan Stage,” November 1989