Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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The Vortical Flow Field of Delta Wing with Leading Edge Extension

  • Lee, Ki-Young (Department of Mechanical Engineering Korea Air Force Academy Chongwon-Gun) ;
  • Sohn, Myong-Hwan (Department of Mechanical Engineering Korea Air Force Academy Chongwon-Gun)
  • Published : 2003.06.01
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Abstract

The interaction and breakdown of vortices over the Leading Edge Extension (LEX) - Delta wing configuration has been investigated through wing-surface pressure measurements, the off-surface flow visualization, and 5-hole probe measurements of the wing wake section. The description focused on analyzing the interaction and the breakdown of vortices depending on the angle of attack and the sideslip angle. The Effect of angle of attack and sideslip angle on the aerodynamic load characteristics of the model is also presented. The sideslip angle was found to be a very influential parameter of the vortex flow over the LEX-delta wing configuration. The introduction of LEX vortex stabilized the vortex flow, and delayed the vortex breakdown up to a higher angle of attack. The vortex interaction and breakdown was promoted on the windward side, whereas it was suppressed on the leeward side.

Keywords

References

  1. Boer, R. G. and Cunningham, A. M., 1990, 'Low-Speed Unsteady Aerodynamics of a Pitching Straked Wing at High Incidence- Part :Test Program,' J. of Aircraft, Vol. 27, No. 1, pp. 23-30 https://doi.org/10.2514/3.56824
  2. Chung, J., Cho, T., Lee, J. and Sung, B., 'Wind Tunnel Test of a Canard Airplane,' KSME International Journal, Vol. 16, No. 1, pp. 12-131
  3. Cornelius, K. C., 1995, 'Analysis of Vortex Bursting Utilizing 3-D Laser Measurements,' J. of Aircraft, Vol. 32, No. 2, pp. 297-306 https://doi.org/10.2514/3.46716
  4. Cunningham, A. M. and Boer, R. G., 1990, 'Low-Speed Unsteady Aerodynamics of a Pitching Straked Wing at High Incidence- Part Ⅰ:Harmonic Analysis,' J. of Aircraft, Vol. 27, No. 1, pp. 31-41 https://doi.org/10.2514/3.45893
  5. Ericksson, L. E., 1999, 'Vortex Characteristics of Pitching Double-Delta Wing,' J. of Aircraft, Vol. 36, No. 2, pp. 349-356 https://doi.org/10.2514/2.2464
  6. Ekaterinaris, J. A., Coutley, R. L., Schiff, L. B. and Platzer, M. F., 1995, 'Numerical Investigation of Incidence Flow over a Double-Delta Wing,' J. of Aircraft, Vol. 32, No. 3, pp. 457-463 https://doi.org/10.2514/3.46742
  7. Fujii, K. and Schiff, L. B., 1989, 'Numerical Simulation of Vortical Flows over a Strake-Delta Wing,' AIAA J., Vol. 27, No. 9, pp. 1153-1162 https://doi.org/10.2514/3.10239
  8. Grismer, D. S. and Nelson, R. C., 1995, 'Double Delta-Wing Aerodynamics for Pitching Motions With and Without Sideslip,' J. of Aircraft, Vol. 32, No. 6, pp. 1303-1311
  9. Hebber, S. K., Platzer, M. F. and Fritzelas, A. E., 2002, 'Reynolds Number Effects on the Vortical-Flow Structure Generated by a Double-Delta Wing,' Experiments in Fluids, Vol. 28, pp. 206-216 https://doi.org/10.1007/s003480050380
  10. Hoeijmarkers, H. W. M. and Vaatstra, W., 1983, 'Vortex Flow over Delta and Double Delta Wing,' J. of Aircraft, Vol. 20, No. 9, pp. 825-832 https://doi.org/10.2514/3.44949
  11. Lee, K. Y., and Sohn, M. H., 2003, 'Combined Effects of Sideslip and Angle of Attack on the Vortical Flow of Delta Wing,' Journal of Korean Society of Aeronautical & Space Science, Vol. 31, No. 2, pp. 17-24 https://doi.org/10.5139/JKSAS.2003.31.2.017
  12. Menke, M. and Gursul, I., 1997, 'Unsteady Nature of Leading Edge Vortices,' Physics Fluids, Vol. 9, No. 10, pp. 2960-2966 https://doi.org/10.1063/1.869407
  13. Ozgoren, M., Sahin, B. and Rockwell, 2002, 'Vortex Structure on a Delta Wing at High Angle of attack,' AIAA J., Vol. 40, No. 2, pp. 285-292 https://doi.org/10.2514/2.1644
  14. Riley, A. J. and Lowson, M. V., 1998, 'Development of a Three-Dimensional Free Shear Layer,' J. Fluid Mechanics, Vol. 369, pp. 49-89
  15. Sohn, M. H. and Lee, K. Y., 2002, 'Expermental Investigation of Vortex Flow of a Yawed Delta Wing Having Leading Edge Extension,' AIAA Paper, pp. 2002-3267
  16. Verhaagen, N. G., 1999, 'Effects of Reynolds Number on the Flow over 76/40-deg Double Delta Wings,' AIAA Paper, pp. 142-152
  17. Verhaagen, N. G. and Naarding, S. H. J., 1989, 'Experimental and Numerical Investigation of the Vortex Flow over a Yawed Delta Wing,' J. of Aircraft, Vol. 26, No. 11, pp. 971-978 https://doi.org/10.2514/3.45869
  18. Winant, C. D. and Browand, F. K., 1974, 'Vortex Pairing : The Mechanism of Tubulent Mixing-Layer Growth at Moderate Reynolds Number,' J. Fluid Mechanics, Vol. 63, pp. 237-255 https://doi.org/10.1017/S0022112074001121