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Experimental Aerodynamics on Rolling Delta Wings at High Angles of Attack

  • J. Sato
  • K. Fujii
  • D. Umezawa
  • Y. Sunada
Conference paper
Part of the International Union of Theoretical and Applied Mechanics book series (IUTAM)

Summary

Normal force and rolling moment acting on delta wings under forced roll oscillation are measured in a low speed wind tunnel. Results for two wings, one with 14 degree apex half angle and the other one with 7 degree apex half angle are compared with flow visualization. Large hysteresis in normal force and rolling moment. is observed even at very slow roll rates. At higher roll rate, positive energy supply from free stream to roll oscillating wings is confirmed. Reduction of stabilizing moment as well as normal Force with the leeward vortex lift-off is shown. At high angle of attack, splitting of lifted-off leeward vortex into one attached and the other one merging into the third vortex from apex is observed on the 7 degree apex half angle model.

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References

  1. 1.
    Henderson, J.N.: Low Speed dandling of a Slender Delta (HP115). J. Royal Aere. Sec. 69 (1965), 311–324.Google Scholar
  2. 2.
    Levin, D. and Katz, J.: Dynamic Load Measurements with Delta Wings Undergoing Self-Induced Roll Oscillations. J. Aircraft, 21 (1984), 30–36.CrossRefGoogle Scholar
  3. 3.
    Ericsson, L.E.: The Fluid Mechanics of Slender Wing Rock. 21 (1981), 322–328.Google Scholar
  4. 4.
    Jun, Y.W. and Nelson, R.C.: Leading-Edge Vortex Dynamics on a Slender Oscillating Wing. J. Aircraft, 25 (1988), 815–819.CrossRefGoogle Scholar
  5. 5.
    Shinbo, Y. and Sato, J.: Unsteady Aerodynamic Forces on Rolling Delta Wings. J. Japan Soc. Aere. Space Sci. 37 (1989), 176–484.Google Scholar
  6. 6.
    Pothamns, E.C.: Predictions of Vortex-Lift Characteristics by a Leading-Edge Suction Analogy. J. Aircraft, 8 (1971), 193–199.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • J. Sato
    • 1
  • K. Fujii
    • 1
  • D. Umezawa
    • 1
  • Y. Sunada
    • 1
  1. 1.Department of Aeronautics, Faculty of EngineeringUniversity of TokyoBunkyoku, TokyoJapan

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