마이크로 유동에서 플래핑 날개의 Tandem 모드를 이용한 추력향상에 대한 연구

Thrust Enhancement through a Tandem Mode of Flapping Wing in Micro Flow

  • 장성민 (한양대학교 일반대학원 기계공학과) ;
  • 맹주성 (한양대학교 기계공학부) ;
  • 안상준 (한양대학교 기계기술연구소)
  • 투고 : 2011.04.18
  • 심사 : 2011.05.19
  • 발행 : 2011.10.15

초록

In this study, based on previous studies, the thrust generated by using flapping tandem wings is examined. We studied on the relationship between the parameters for characterizing oscillatory tandem wings (namely, the Strouhal number and Reynolds number) for thrust generation in micro flow regime. At each Reynolds number, Strouhal number, heaving amplitude, distance between tandem wings, and phase difference are varied and the flapping motions of tandem mode are calculated to find the optimum conditions for generating thrust. As a result, comparing with a single flapping mode, we found that the minimum Strouhal number for generating thrust is shifted down up to approximately 25% when the tandem flapping mode is applied.

키워드

참고문헌

  1. Singh, B., Ramasamy, B., Chopra, I., and Leishman, J. G., 2005, "Experimental Studies on Insect-Based Flapping Wings for Micro Hovering Air Vehicles," 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference; pp. 1-19.
  2. Park J. Y., Kim S. R., Lee W. G., Yoo J. S., Kim Y. D., Han S. Y., and Maeng J. S., 2007, "Shape Optimization of an Active Micro-mixer for Improving Mixing Efficiency," KSMTE, Vol. 16, No. 6, pp. 146- 152.
  3. Park J. Y., Yoo J. S., Hwang S. M., Im M. G., Oh Y. G., Kim Y. D., Han S. Y., and Maeng J. S., 2008, "Optimization of a Micro-mixer using a Sequential Kriging Method," KSMTE, Vol 21, Part 3, Part 10, pp. 723-726.
  4. Miller, L. A., and Peskin, C. S., 2004, "When Vortices Stick: an Aerodynamic Transition in Tiny Insect Flight," Journal of Experimental Biology, Vol. 207, No 17, pp. 3073-3088. https://doi.org/10.1242/jeb.01138
  5. Wang, Z. J., 2000, "Two Dimensional Mechanism for Insect Hovering," Physical review letters, vol. 85, No. 10, pp. 2216-2219. https://doi.org/10.1103/PhysRevLett.85.2216
  6. Wu, J. H., and Sun, M., 2004, "Unsteady Aerodynamic Forces of a Flapping Wing," Journal of Experimental Biology, Vol. 207, No 7, pp. 1137-1150. https://doi.org/10.1242/jeb.00868
  7. Shyy, W., and Liu, H., 2007, "Flapping Wings and Aerodynamic Lift: The Role of Leading-edge Vortices," AIAA Journal, Vol. 45, No. 12, pp. 1817-1819.
  8. An, S., Jhon, M. S., Han, C., and Maeng, J., 2011, "Thrust Generation of a Heaving Foil in Micro Flow," AIAA Journal, Submitted.
  9. Tuncer, I. H., Lai, J. C. S., and Platzer, M. F., 1998, "A Computational Study of Flow Reattachment over a Stationary-Flapping Airfoil Combination in Tandem," 36th AIAA Aerospace Sciences Meeting and Exhibit, AIAA-1998-0109, pp. 90-109.
  10. Read D. A., Hover F. S., and Triantafyllou M. S., 2003, "Forces on Oscillating Foils for Propulsion and Maneuvering," Journal of Fluids and Structures, Vol. 17, No. 1, pp. 163-183. https://doi.org/10.1016/S0889-9746(02)00115-9
  11. Triantafyllou, M. S., Techet, A. H., and Hover, F. S., 2004, "Review of Experimental Work in Biomimetic Foils," IEEE, Vol. 29, No. 3, pp. 585-594.
  12. Bhatnagar, P. L., Gross, E. P., and Krook, M., 1954, "A Model for Collision Processes in Gases: Small Amplitude Processes in Charged and Neutral One- Component System," Physical Review, Vol. 94, No. 3, pp. 511-525. https://doi.org/10.1103/PhysRev.94.511
  13. Chen, S., and Doolen, G., 1998, "Lattice Boltmann Method for Fluid Flows," Annual Review of Fluid Mechanics, Vol. 30, pp. 329-364. https://doi.org/10.1146/annurev.fluid.30.1.329
  14. Chapman, S., and Cowling, T. G., 1970, The Mathematical Theory of Nonuniform Gases, 3rd ed., Cambridge Univ. Press, New York,
  15. Lallemand, P., and Luo, L. S., 2003, "Lattice Boltzmann Method for Moving Boundaries," journal of Computational Physics, Vol. 184, No. 2, pp. 406-421. https://doi.org/10.1016/S0021-9991(02)00022-0
  16. Mei, R., Yu, D., Shyy, W., and Luo, L. S., 2002, "Force Evaluation in the Lattice Boltzmann Method Involving Curved Geometry," physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 65, No. 041203, pp. 1-14.
  17. An, S., Han, C., Jhon, M. S., and Maeng, J., "Thrust Generation of a Heaving Foil in Micro Flow," AIAA journal, in press.
  18. Childress, S., and Dudley, R., 2004, "Transition from Ciliary to Flapping Mode in a Swimming Mollusc: Flapping Flight as a Bifurcation in Re$\omega$," Journal of Fluid Mechanics, Vol. 498, pp. 257-288.