International Journal of Aerospace System Engineering

The Society for Aerospace System Engineering (항공우주시스템공학회)
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A Study on the Aerodynamic Characteristics of a Joined-wing Aircraft with Variation of Wing Configurations

  • Kidong Kim (Aerospace Technology Research Institute, Agency for Defense Development) ;
  • Jisung Jang (Aerospace Technology Research Institute, Agency for Defense Development)
  • Received : 2022.07.21
  • Accepted : 2023.03.02
  • Published : 2023.06.30
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Abstract

The present study was attempted to investigate flow interference effects and the aerodynamic characteristics of the front and rear wings of a joined-wing aircraft by changing the configuration variables. The study was performed using a computational fluid dynamics(CFD) tool to demonstrate forward flight and analyze aerodynamic characteristics. A total of 9 configurations were analyzed with variations on the position, height, dihedral angle, incidence angle, twist angle, sweepback angle, and wing area ratio of the front and rear wings while the fuselage was fixed. The quantities of aerodynamic coefficients were confirmed in accordance with joined-wing configurations. The closer the front and rear wings were located, the greater the flow interference effects tended. Interestingly, the rear wing did not any configuration change, the lift coefficient of the rear wing was decreased when adjusted to increase the incidence angle of the front wing. The phenomenon was appeared due to an effective angle of attack alteration of the rear wing resulting from the flow interference by the front wing configurations.

Keywords

Acknowledgement

This work was supported by the Agency for Defense Development by the Korean Government.(912665201)

References

  1. C. J. Hwang, J. H. Jeong, J. Joo, and I. H. Hwang, "Noise Reduction Technology for Rotorcraft," Journal of Korea Society for Noise and Vibration Engineering, Vol. 17, No. 5, pp.8~15, 2007.
  2. J. M. Kim, "KARI Experience of the Compound Rotorcraft Concept Study and Recent Trend of Highspeed VTOL Development in the World," Proceeding of The Korean Society for Aeronautical and Space Sciences Spring Conference, pp.866~870, November 2015.
  3. L. Prandtl, "Induced Drag of Multiplanes," NACATN-182, 1924.
  4. J. Wolkovitch, "The Joined Wing: An Overview," Journal of Aircraft, Vol. 23, No. 3, pp. 161~178, March 1986. https://doi.org/10.2514/3.45285
  5. S. C. Smith, and R. K. Stonum, "Experimental aerodynamic characteristics of a joined-wing research aircraft configuration," NASA-TM-101083, 1989.
  6. J. N. Perkins, F. M. Cheatwood, R. J. Vess, and R. A. Wahls, "The Design and Testing of Several Joined Wing RPV's," Proceeding of AlAA 23rd Aerospace Sciences Meeting, January 14-17, 1985.
  7. I. Kroo, and J. Gallman, "Aerodynamic and Structural Studies of Joined Wing Aircraft," Journal of Aircraft, Vol. 28, No. 1, pp. 74~81, Jan. 1991. https://doi.org/10.2514/3.45994
  8. M. S. Hwang, B. J. Lee, W. H. Kim, , D. J. Sin, K. J. Lee, and Y. H. Byun, "A Study on the Development of RPV with Joined Wing - Characteristics of Dihedral Angle and Airfoil of a Joined Wing -," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 22, No. 5, pp.1~9, 1994.
  9. M. Barcala, C. Cuerno-Rejado, S. del Giudice, F. Gandia-Aguera, and A. A. Rodriguez-Sevillano, "Experimental Investigation on Box-Wing Configuration for UAS," Proceeding of 26th Bristol International Unmanned Air Vehicle Systems Conference, pp.1~18, 2011.
  10. J. Perez-Alvarez, C. Cuerno-Rejado, and J. Meseguer, "Aerodynamic parametric analysis of an unconventional joined-wing aircraft configuration," Proceedings of the Institution of Mechanical Engineers Part G, Journal of Aerospace Engineering, pp.1~17, December 2015.
  11. B. J. Lee, M. S. Hwang, W. H. Kim, K. J. Lee, and Y. H. Byun, "A Study on the Aerodynamic Characteristics of Cruciform Joined Wings," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 21, No. 4, pp.1~14, 1993.
  12. Paracreo, "Introduction to Aircraft Design: Mean Aerodynamic Chord", July 28, 2011.
  13. M. Hashimoto, M. Ishikawa, N. Hirose, and T. Ohnuki "A Computational and Experimental Analysis of Joined-Wing Aerodynamics," 17th congress of the International Council of the Aeronautical Sciences, Vol. 1, pp. 1017~1027, September. 1990.
  14. F. R. Menter, "Two-equation Eddy-viscosity Turbulence modeling for Engineering Application," AIAA Journal, Vol. 32, No. 8, pp.1598~1605, 1994. https://doi.org/10.2514/3.12149
  15. H. Lee, Y. Kim, G. Park, R. Kolonay, M. Blair, and R. Canfield, "Structural optimization of a joined-wing using equivalent static loads," 11th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA2006-7009, Virginia, 2006.
  16. P. Mamla, and C. Galinski, "Basic Induced Drag Study of the Joined-Wing Aircraft," Journal of Aircraft, Vol. 46, No. 4, pp. 1438~1440, 2009. https://doi.org/10.2514/1.42084
  17. P. Kumar, and A. Khalid, "Analysis of Aspect Ratio and Winglet Height of a Box Wing Design," Proceeding of AlAA 14th Aviation Forum, June 16-20, 2014.
  18. R. Cavallaro, and L. Demasi, "Challenges, Ideas, and Innovations of Joined-Wing Configurations: A Concept from the Past, an Opportunity for the Future," Progress in Aerospace Sciences, Vol. 87, pp. 1~93, November. 2016. https://doi.org/10.1016/j.paerosci.2016.07.002
  19. J. Roskam, and C. E. Lan, Airplane Aerodynamics and Performance, Design, 1st printing, Analysis and Research corporation, pp.186, 1997.