A Study on the Far-Field Boundary Condition of Tightly Coupoled CFD/FreeWake Method in Hover로터 제자리비행에 적용된 CFD/FreeWake 연계방법의 원거리 경계조건에 대한 연구
본 논문에서는 CDF/FreeWake 연계해석방법을 이용하여 헬리곱터 로터의 공력을 해석하였다. 연계해석방법은 CDF를 이용하여 로터주변의 공력을 얻고, 후류의 거동은 FreeWake를 이용하여 모사한다. FreeWake 모델은 CDF의 경계조건을 제공하고, CDF는 후류형성을 위한 로터블레이드 양력변화율을 제공하는 방법으로 연계된다. CDF/FreeWake 연계해석방법은 다른 로터공력해석 방법에 비하여 높은 정확도와 계산 시간 절감으로 효율적인 계산을 가능하도록 한다.
In this study, helicopter rotor flow is simulated by using a tightly coupled CFD/FreeWake method to describe wake characteristics and to calculate the flow field and rotor aerodynamics. In this tightly coupled CFD/FreeWake method, freewake model provides the boundary condition required in the CFD calculation and CFD provides the pressure distribution on blade surface used in freewake generation. To show the advantage of this method, the pressure distributions on blade surface of a hovering 2-bladed rotor are compared with other numerical methods. This tightly coupled CFD/FreeWake method shows good accuracy in the predicted results and efficient computation time.
In this study, helicopter rotor flow is simulated by using a tightly coupled CFD/FreeWake method to describe wake characteristics and to calculate the flow field and rotor aerodynamics. In this tightly coupled CFD/FreeWake method, freewake model provides the boundary condition required in the CFD calculation and CFD provides the pressure distribution on blade surface used in freewake generation. To show the advantage of this method, the pressure distributions on blade surface of a hovering 2-bladed rotor are compared with other numerical methods. This tightly coupled CFD/FreeWake method shows good accuracy in the predicted results and efficient computation time.
- Publisher
- 한국항공우주학회
- Issue Date
- 2007-11
- Keywords
연계 방법; 전산유체역학; 자유후류; 로터
- Citation
한국항공우주학회지, 제35권, 제11호, pp.957-963
- Citation
- Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 35, No.11, pp.957-963
- Appears in Collection
- AE-Journal Papers(저널논문)
- Files in This Item
- 04305112.pdf(1.33 MB)Download
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