Trans Motauto World
Vol. 6 (2021), Issue 2, pg(s) 47-50

TRANSPORT TECHNICS. INVESTIGATION OF ELEMENTS. RELIABILITY

Design of a sailplane based on modern computational methods

  • 1 Technical University – Sofia, Bulgaria

Abstract

The purpose of the current study is to evaluate and apply a new approach to the design process of an aircraft with a high aspect ratio wing, based on modern understandings and development in the fields of aerodynamics and computational fluid dynamics. Conventional methods rely on semi-analytical models for describing different flow characteristics and interactions with bodies. The classical approach requires numerous coefficients to account for unknown effects, what is more, such workarounds are derived for well-defined cases and are not easily applicable for complex problems which could be dangerously misleading. CFD analysis, based on new developments in computational machines, give the possibility of analyzing complex aerodynamic interactions such as shading, downwash, ground effect and vortex shedding. Such use of innovative technology has already proven itself to have beneficial effect on reduction of cost a nd human error by being able to simplify and speedup many of the calculations without the need of coefficient adjustments.

Keywords

References

  1. M. Mahdi, „Prediction of wing downwash using CFD“, 3rd International Workshop on Numerical Modelling in Aerospace Sciences, (2015)
  2. J.Genov, I.Angelov,„Numerical investigation on the effects of the aerodynamic shading between the tower and the blade of wind turbine generator with horizontal axis Numerical investigation on the effects of the aerodynamic shading between the tower and the blade of wind turbine generator with horizontal axis“, IOP Conference Series Materials Science and Engineering, (2020)
  3. S. Frati, The Glider, (2007)
  4. A.Ortiz, L. Quiroz, R.Kӧck, „Aerodynamicperformance analysis of a low-speed acrobatic airplane by numerical simulation“, Mechanica Computacional, Vol. XXI, p.378 – 391, (2002)
  5. D.Coiro, F.Marulo, F.Nicolosi, F.Ricci, „Numerical wind tunnel and flight tests for P92J and P96 light aircraft“, 21st ICAS Congress, (1998)
  6. European Union Aviation Safety Agency, „Certification Specifications for Sailplanes and Powered Sailplanes CS-22,“, (2008)
  7. https://www.quora.com/What-is-the-advantage-of-elliptical-wings-over-trapezoidal-wings (04.2021)
  8. Bak, C. Fuglsang, P. Johansen, J. Antoniou, I. „Wind tunnel tests of the NACA 63-415 and a modified NACA 63-415 airfoil“ - Risø National Laboratory, Roskilde, Denmark, (2000)
  9. Snorri Gudmundsson, „General Aviation Aircraft Design Applied Methods and procedures“, APPENDIX C4: Design of Sailplanes, Basic Mathematical Relations for Glide Performance
  10. R. Herman, „Solving differential equations using Simulink“, p.20-23, (2017)
  11. Pilatus Aircraft LTD. STANS (Switzerland), „Approved Flight manual and operating manual for sailplane model: Pilatus B4- PC11“, (1972)
  12. Aero Letnany, „Pilot’s notes for the Blanik L-13 Saolplane, 2nd revised edition Czechoslavak Aeronautical Works“ , (1972)
  13. Alexander Schleicher GmbH & Co. Ka8 and Ka8 B/C, “Rhonsegler” Operating Instructions. (2010)

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