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풍력 블레이드의 표면발생 결빙에 의한 공력 영향성 전산 예측
박지호(J.H. Park),안국빈(G.B. Ahn),정기영(K.Y. Jung),명노신(R.S. Myong) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5
A significant change in aerodynamic characteristics can occur by ice accretion on the surface of wind, turbine blade due to low temperature in cold climate. In particular, it will result in the loss in electricity production through a negative influence on lift and drag. In this study, the impact of ice accretions on the aerodynamic characteristics of wind, turbine blade sections is examined by computational methods. It is shown that the thickness of ice accretion increase and the lift-to-drag ratio decrease from the root to the tip.
정기영(K.Y. Jung),안국빈(G.B. Ahn),명노신(R.S. Myong),조태환(T.H. Cho),정성기(S.K. Jung),신훈범(H.B. Shin) 한국전산유체공학회 2012 한국전산유체공학회지 Vol.17 No.2
Ice accretion on the surface of aircraft in flight can adversely affect the safety of aircraft. In particular, it can cause degradation of critical aircraft performances such as maximum lift coefficient and total pressure recovery factor in engine air intake. In this study, computational prediction of ice accretion around a rotorcraft air intake is conducted in order to identify the impingement region with high droplet collection efficiency. Then the amount of ice accretion on the air intake, which is essential in determining the required power of ice protection system, is calculated. Finally, the effect of icing wind tunnel size is investigated in order to check the compatibility with the real in-flight test environment.
정기영(K.Y. Jung),안국빈(G.B. Ahn),정성기(S.K. Jung),명노신(R.S. Myong),조태환(T.H. Cho),신훈범(H.B. Shin),정주현(J.H. Jung),최영호(Y.H. Choi),김정훈(J.H. Kim) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
Ice accretion on aircraft surface can greatly deteriorate the safety of aircraft. In particular, it can be a cause of impediment for aircraft performances such as aerodynamic characteristics, control, and engine. Numerical simulation of icing accretion based on the state-of-art CFD techniques can be alternative to expensive icing wind tunnel test or flight test. In this study, icing conditions are defined in order to predict the ice accretions around the air intake of aircraft. Then the range and amount of ice accretion on the intake in icing wind tunnel were investigated. In addition, a study on the size effect of icing wind tunnel was conducted in order to check the compatibility with the real in-flight test environment.
CFD 및 BEM 기법을 이용한 풍력 블레이드의 결빙에 의한 공력특성 변화 전산 예측
박지호(J.H. Park),안국빈(G.B. Ahn),정기영(K.Y. Jung),명노신(R.S. Myong) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.11
A significant change in aerodynamic characteristics can occur by ice accretion on the surface of wind turbine blade due to low temperature in cold climate. In particular, it will result in the loss in electricity production through a negative influence on lift and drag. In this study, the impact of ice accretions on the aerodynamic characteristics of wind turbine blade sections is first investigated. The results are then used to predict 3D aerodynamic characteristics of wind, turbine blade through the blade element momentum method. It is shown that the thickness of ice accretion increase and the lift-to-drag ratio decrease from the root to the tip, and, as a result, the power coefficients decrease significantly.