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

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Aerodynamic Noise Prediction of a Helicopter Rotor Blade for the Flight Conditions of Approach and Flyover

비행 조건 별 헬리콥터 로터 블레이드 공력 소음 예측

  • Received : 2017.09.08
  • Accepted : 2018.06.30
  • Published : 2018.08.01
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Abstract

Helicopter noise prediction is an essential process for developing low noise helicopter technology. In this paper, the noise prediction method is developed using the helicopter integrated performance analysis program CAMRAD-II and in-house noise analysis code. In addition, the analytical technique was verified by analyzing blade-vortex interaction noise, which is the biggest cause of helicopter noise. In order to predict the actual helicopter noise, the noise analysis was performed for the flyover and approach condition, which is the standard measurement condition of the International Civil Aviation Organization (ICAO). Finally, we confirmed the suitability of the analytical method through comparison and analysis with the flight test results.

헬리콥터 소음예측은 저소음 헬리콥터 기술 개발에 필수적인 과정이다. 본 논문에서는 헬리콥터 통합성능해석프로그램 CAMRAD-II와 자체개발한 소음해석코드를 이용하여 소음예측 기법을 구축하였다. 또한 헬리콥터 소음 중 가장 큰 원인인 블레이드-와류 간섭 소음을 분석하여 해석기법을 검증하였다. 실제적인 소음예측을 위해 국제민간항공기구(ICAO)에서 기준으로 하고 있는 헬리콥터 소음 측정 비행조건인 Flyover, Approach 조건에 대해서 소음해석을 수행하였으며, 최종적으로 비행시험결과 와의 비교 분석을 통해 해석방법의 적합성을 확인하였다.

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References

  1. Wie, S. Y., and Kang, H. J., "Noise Characteristics of Main rotor blade in the flyover, approach, takeoff flight conditions," Proceeding of the 2016 KSAS Fall Conference, 2016.
  2. Lim, J. W., Boyd, D., Kim, D. H., Jung, S. N., You, Y. H., Tananbe, Y., Baily, J., Lienard, C. and Delrieux, Y., "Aeromechanical Evaluation of Smart-Twisting Active Rotor," 40th European Rotorcraft Forum, 2014.
  3. Wie, S. Y., Kim, D. H, Kang, H. J., Chung, K. H., and Hwang, C., "Development of the Helicopter Noise Prediction Code and its Applications," Proceeding of the 2014 KSNVE Fall Conference, 2014.
  4. Evan A., F., "Aerodynamic Design of the Sikorsky S-76 SPIRITTM Helicopter," Journal of the American Helicopter Society, Vol. 24, No. 3, 1979, pp.11-19. https://doi.org/10.4050/JAHS.24.11
  5. Jepson, D., Moffitt, R., Hilzinger, K., and Bissell, J., "Analysis and Correlation of Test Data From an Advanced Technology Rotor System," NASA CR-3714, 1983.
  6. Kottapalli, S., and Leyland, J., "Analysis of Open Loop Higher Harmonic Control at High Airspeeds on a Modern Four-Bladed Articulated Rotor," NASA TM-103876, 1991.
  7. Sitaraman, J., "CFD Based Unsteady Aerodynamic Modeling for Rotor Aeroelastic Analysis," Ph.D Dissertation, University of Maryland, 2003.
  8. Leishman, J. G., Principles of Helicopter Aerodynamics, 2nd Ed., CAMBRIDGE UNIVERSITY PRESS, 2006.
  9. Mosher, M., "Acoustic Measurements of a Full-Scale Rotor with Four Tip Shapes," NASA TM, 1984
  10. Wie, S. Y., and Kang, H. J., "Aero-noise analysis for S76 helicopter," Proceeding of the 2015 SASE Fall Conference, 2015.
  11. International Civil Aviation Organization Annex 16, Environmental Protection volume 1 Aircraft Noise, 2011.