International Journal of Aeronautical and Space Sciences

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

Comprehensive Code Validation on Airloads and Aeroelastic Responses of the HART II Rotor

  • You, Young-Hyun (Department of Aerospace Information Engineering, Konkuk University) ;
  • Park, Jae-Sang (Department of Aerospace Information Engineering, Konkuk University) ;
  • Jung, Sung-Nam (Department of Aerospace Information Engineering, Konkuk University) ;
  • Kim, Do-Hyung (Rotor Department, Korea Aerospace Research Institute)
  • Published : 2010.06.15
Download PDF
⟨ Previous Next ⟩

Abstract

In this work, the comprehensive structural dynamics codes including DYMORE and CAMRAD II are used to validate the higher harmonic control aeroacoustic rotor test (HART) II data in descending flight condition. A total of 16 finite elements along with 17 aerodynamic panels are used for the CAMRAD II analysis; whereas, in the DYMORE analysis, 10 finite elements with 31 equally-spaced aerodynamic panels are utilized. To improve the prediction capability of the DYMORE analysis, the finite state dynamic inflow model is upgraded with a free vortex wake model comprised of near shed wake and trailed tip vortices. The predicted results on aerodynamic loads and blade motions are correlated with the HART II measurement data for the baseline, minimum noise and minimum vibration cases. It is found that an improvement of solution, especially for blade vortex interaction airloads, is achieved with the free wake method employed in the DYMORE analysis. Overall, fair to good correlation is achieved for the test cases considered in this study.

Keywords

References

  1. Bauchau, O. A. (2007). DYMORE User’s Manual. Savannah, GA: Georgia Institute of Technology.
  2. Bhagwat, M. J. and Leishman, J. G. (2001). Stability, consistency and convergence of time-marching free-vortex rotor wake algorithms. Journal of the American Helicopter Society, 46, 59-71. https://doi.org/10.4050/JAHS.46.59
  3. Hodges, D. H. (1990). A mixed variational formulation based on exact intrinsic equations for dynamics of moving beams. International Journal of Solids and Structures, 26, 1253-1273. https://doi.org/10.1016/0020-7683(90)90060-9
  4. Johnson, W. (1992). CAMRAD II, Comprehensive Analytical Model of Rotorcraft Aerodynamics and Dynamics. Palo Alto, CA: Johnson Aeronautics.
  5. Lim, J. W. (2008). An assessment of rotor dynamics correlation for descending flight using CFD/CSD coupled analysis. 64th Annual AHS Forum, Montreal. pp. 239-260.
  6. Lim, J. W., C, T., Yu, Y. H., Burley, C., Brooks, T., Boyd, D., Van der Wall, B. G., Schneider, O., Richard, H., Raffel, M., Beaumier, P., Bailly, J., Delrieux, Y., Pengel, K., and Mercker, E. (2003). HART II: prediction of blade-vortex interaction loading. 29th European Rotorcraft Forum, Friedrichshafen, Germany.
  7. Lim, J. W. and Van Der Wall, B. G. (2005). Investigation of the effect of a multiple trailer wake model for descending flights. 61st Annual AHS Forum, Grapevine, TX. pp. 1063-1081.
  8. Liu, H. (2008). Interfacing Comprehensive Rotorcraft Analysis with Advanced Aeromechanics and Vortex Wake Models. PhD Thesis, Georgia Institute of Technology.
  9. Min, B. Y., Sankar, L., Prasad, J. V. R., and Schrage, D. (2009). A physics-based investigation of gurney flaps for rotor vibration reduction. 65th Annual AHS Forum, Grapevine, TX. pp. 139-149.
  10. Peters, D. A. and He, C. J. (1995). Finite state induced flow models part II: three-dimensional rotor disk. Journal of Aircraft, 32, 323-333. https://doi.org/10.2514/3.46719
  11. Potsdam, M., Yeo, H., and Johnson, W. (2006). Rotor airloads prediction using loose aerodynamic/structural coupling. Journal of Aircraft, 43, 732-742. https://doi.org/10.2514/1.14006
  12. Roget, B. (2006). Simulation of active twist and active flap control on a model-scale helicopter rotor. 24th AIAA Applied Aerodynamics Conference, San Francisco, CA. pp. 1681-1696.
  13. Van der Wall, B. G. (2003). 2nd HHC Aeroacoustic Rotor Test (HART II)-Part I: Test Documentation-Institute Report IB 111-2003/31. Braunschweig, Germany: German Aerospace Center (DLR).
  14. Van der Wall, B. G. and Yin, J. (2007). DLR’s S4 rotor code validation with HART II data: the baseline case. International Forum on Multidisciplinary Technology, Seoul, Korea.
  15. Yang, C., Inada, Y., and Aoyama, T. (2007). BVI noise prediction using HART II motion data. International Forum on Multidisciplinary Technology, Seoul, Korea.
  16. Yeo, H. and Johnson, W. (2005). Assessment of comprehensive analysis calculation of airloads on helicopter rotors. Journal of Aircraft, 42, 1218-1228. https://doi.org/10.2514/1.11595
  17. Yu, Y. H., Tung, C., Van der Wall, B. G., Pausder, H. J., Burley, C., Brooks, T., Beaumier, P., Delriuex, Y., Mercker, E., and Pengel, K. (2002). The HART-II test: rotor wakes and aeroacoustics with higher-harmonic pitch control (HHC) inputs. 58th Annual AHS Forum, Montreal, Canada.

Cited by

  1. Investigation of Wake Effects on Aeroelastic Responses of Horizontal-Axis Wind-Turbines vol.52, pp.6, 2014, https://doi.org/10.2514/1.J051899