Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

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

DOI QR Code

Numerical Flow Simulation of a UH-60A Full Rotorcraft Configuration in Forward Flight

전진비행하는 UH-60A 헬리콥터 전기체 형상에 대한 유동 해석

  • 이희동 (한국과학기술원 항공우주공학과 대학원) ;
  • 권오준 (한국과학기술원 항공우주공학과) ;
  • 강희정 (한국항공우주연구원 로터팀)
  • Received : 2010.03.25
  • Accepted : 2010.05.25
  • Published : 2010.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

In the present study, unsteady calculations have been performed to simulate flows around a UH-60A full configuration including main rotor, fuselage, and tail rotor. A flow solver developed for helicopter aerodynamic analysis was used for the simulation of the complete helicopter in high-speed and low-speed forward flight. Unsteady vibratory loads on the main rotor blades were compared with flight test and other calculated data for the assessment of the present flow solver. Aerodynamic interaction of the three components of the helicopter was investigated by comparing with the results of main-rotor-alone, main rotor and fuselage, and tail-rotor-alone configurations. It was found that the existence of the fuselage has an effect on the normal force distribution of the main rotor by varying downwash distribution on the rotor disc, and tip vortices trailed from the main rotor strongly interact with the tail-rotor.

본 연구에서는 주로터, 동체, 그리고 꼬리로터를 포함한 UH-60A 전기체 형상에 대한 비정상 유동 해석을 수행하였다. 개발된 로터해석용 유동 해석코드를 이용하여 고속 전진 비행 및 저속 전진비행 조건에 대한 해석을 수행하였으며, 해석코드의 검증을 위해 주로터에서의 비정상 공력 하중을 비행시험 및 타 연구자들의 해석 결과와 비교하였다. 주로터만 존재하는 형상, 주로터와 동체만 존재하는 형상, 그리고 꼬리로터만 존재하는 형상에 대한 해석 결과를 전기체 형상에 대한 해석 결과와 비교함으로써 헬리콥터 각 컴포넌트 간의 공기력 간섭현상을 분석하였다. 동체는 주로터에서 발생하는 내리흐름 분포를 변화시킴으로써 주로터의 수직력 분포를 변화시키는 요인이 됨을 확인하였으며, 주로터 끝단으로부터 발생한 와류와 꼬리로터 블레이드가 충돌함에 따라 강한 간섭현상이 발생함을 확인하였다

Keywords

References

  1. Leishman, J. G., "Principles of Helicopter Aerodynamics", Second Edition, Cambridge University Press, New York, 2006.
  2. Yang, Z., Sanka, L. N., Smith, M. J., and Bauchau, O., "Recent Improvements to a Hybrid Method for Rotors in Forward Flight", Journal of Aircraft, V. 39, N. 5, 2002, pp. 804-812. https://doi.org/10.2514/2.3000
  3. Postdam, M., Yeo, H., and Johnson, W., "Rotor Airloads Prediction Using Loose Aerodynamic/Structural Coupling", American Helicopter Society 60th Annual Forum, Baltimore, MD, June, 2004.
  4. Datta, A., Sitaraman, J., Chopra, I., and Baeder, J. D., "CFD/CSD Prediction of Rotor Vibratory Loads in High-Speed Flight", Journal of Aricraft, V. 43, N. 6, 2006, pp. 1698-1709. https://doi.org/10.2514/1.18915
  5. Ananthan, S., Baeder, J. D., and Sitaraman, J., Hahn, S., Iaccarino, G., "Hybrid Unsteady Simulation of Helicopters : HUSH", AIAA Paper 2008-7339, 2008.
  6. Nam, H. J, Park, Y. M., and Kwon, O. J., "Simulation of Unsteady Rotor-Fuselage Interaction Using Unstructured Adaptive Meshes", Journal of American Helicopter Society, V. 51, N. 2, 2006, pp. 141-149. https://doi.org/10.4050/JAHS.51.141
  7. You, J. Y., Jung, M. S., and Kwon, O. J., "Numerical Simulation of Rotor-Airframe Interactin Using a Parallel Unstructured Chimera Technique", Heli Japan 2006, 2006.
  8. Yang, C., Aoyama, T., Kondo, N., and Saito, S., "Aerodynamic/Acoustic Analysis for Main Rotor and Tail Rotor of Helicopter", Transactions of the Japan Society for Aeronautical And Space Sciences, V. 51, N. 171, 2008, pp. 28-36. https://doi.org/10.2322/tjsass.51.28
  9. Dietz, M., Kessler, M., and Kramer, E., "Trimmed Simulation of a Complete Helicopter Configuration Using Fluid-Structure Coupling", High Performance Computing in Science and Engineering '07, Transactions of the High Performance Computing Center, Stuttgart, 2007, pp. 487-501.
  10. Jung, M. S, Kang, H. J., and Kwon, O. J., "Assessment of an Unstructured Mesh Viscous Flow Solver for Rotor Performance Analysis", International Forum on Rotorcraft Multidisciplinary Technology, AHS Specialist's Conference, 2007.
  11. Jung, M. S. and Kwon, O. J., "A Parallel Unstructured Hybrid Overset Mesh Technology for Unsteady Viscous Flow Simulations", International Conference on Parallel Computational Fluid Dynamics, 2007.
  12. Kufeld, R. M., Balough, D. L., Cross, J. L., Studebaker, K. F., Jennison, C. D., and Bousman, W. G., "Flight Testing the UH-60A Airloads Aircraft", American Helicopter Society 50th Annual Forum, 1994.
  13. Bousman, W. G. and R. M. Kufeld, "UH-60A Airloads Catalog", NASA TM-2005-212827, 2005.
  14. Bousman, W. G., "UH-60 Airloads Program Tutorial", Americal Helicopter Society 65th Annual Forum, 2009.
  15. Yeo, H., Bousman, W. G., and Johnson, W., "Performance Analysis of a Utility Helicopter with Standard and Advanced Rotors", American Helicopter Society Aerodynamics, Acoustics, and Test and Evaluation Technical Specialist Meeting, San Francisco, January, 2002.
  16. Bousman, W. G., "Aerodynamic Characteristics of SC1095 and SC1094R8 Airfoils", NASA TP-2003-212265, 2003.
  17. Howlett, J. J., "UH-60A Black Hawk Engineering Simulation Program : Volume 1-Mathematical Model", NASA CR-166309, 1981.

Cited by

  1. Aerodynamic Simulation of Air-Launched Missiles from a Complete Helicopter vol.39, pp.12, 2011, https://doi.org/10.5139/JKSAS.2011.39.12.1097