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헬리콥터 로터 블레이드 예비설계를 위한 에어포일 공력 해석

Airfoil Aerodynamic Analysis for the Helicopter Rotor Blade Preliminary Design

  • 발행 : 2005.06.01

초록

헬리콥터 로터 블레이드 예비설계 단계에서 에어포일 선정과 분포의 기초 자료를 생성하기 위해 로터 에어포일 공력해석을 수행하였다.기존 헬리콥터의 에어포일 중 공력해석 대상으로 10개를 선정하고 블레이드 요소이론을 이용한 공력해석에 적합한 table 형태의 공력계수 자료를 생성하였다. 해석 비용을 고려, 풍동시험 대신 간단한 수학적 모델을 이용하여 모든 받음각 영역($-180^{o}\sim180^{o}$)에서 공력특성 곡선($C_{l},C_{m},C_{d}$)을 구성하였다. 공력특성곡선 구성에 필요한 각 에어포일의 필수 공력자료를 IBLM을 이용하여 구하였으며, 구성된 공력특성곡선은 실험결과와 정성적으로 일치하였다. 마지막으로, 에어포일 선정과 분포설계의 기준을 마련하기 위하여 각 에어포일의 양력계수, 모멘트계수를 상호 비교한 후 분류하였다.

The aerodynamic analysis of helicopter rotor airfoils was performed to generate the basic data for selection and distribution of airfoils at the helicopter rotor blade preliminary design phase.10 airfoils were chosen among the existing rotor airfoils, and the tabulated aerodynamic coefficients which are proper for the aerodynamic analysis using blade element theory were generated. Considering analysis cost, the simple mathematical models were chosen before the wind tunnel test to generate the aerodynamic characteristic curves($C_{l},C_{m},C_{d}$) in full AoA range($-180^{o}\sim180^{o}$) including the reverse flow region. The essential data necessary to the generation of the complete curves were obtained by using the IBLM(Interactive Boundary Layer Method). The generated aerodynamic characteristic curves agree with experimental results qualitatively. Finally, the aerodynamic characteristics of all 10 airfoils were compared and classified according to their own lift or moment characteristics.

키워드

참고문헌

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피인용 문헌

  1. Aerodynamic performance evaluation of basic airfoils for an agricultural unmanned helicopter using wind tunnel test and CFD simulation vol.31, pp.12, 2017, https://doi.org/10.1007/s12206-017-1125-x
  2. Performance Comparison of Two Airfoil Rotor Designs for an Agricultural Unmanned Helicopter vol.37, pp.1, 2012, https://doi.org/10.5307/JBE.2012.37.1.001