RANS와 LES를 이용한 Ridge Iced 에어포일 유동장에 관한 전산해석

다국어 초록 (Multilingual Abstract)

The present study investigated the turbulent characteristics and aerodynamic performance of a ridge iced airfoil using RANS as well as LES. The ridge ice shape selected from the literature was placed at 10 percent of the airfoil chord. The RANS and LES simulations were then carried out on clean and iced airfoils to compare their performance. The results indicate that the LES predictions are in general more accurate than the RANS model for the flows considered in this study, especially at near stall flight conditions in region where the complex turbulence flows occur. Moreover, the prediction of the reattachment point on the iced airfoil by LES was shown to be fairly accurate at most of flow conditions.

참고문헌 (Reference)

1 Deck, S., "Zonal-Detached-Eddy Simulation of the Flow Around a High-Lift Configuration" 43 (43): 2372-2384, 2005

2 Zhang, Y., "Zonal Detached-Eddy Simulation of Turbulent Unsteady Flow over Iced Airfoils" 53 (53): 168-181, 2015

3 Yue, Z., "Zonal Deatched-Eddy Simulation of Turbulent Unsteady Flow over Iced Airfoils" 5 (5): 168-181, 2016

4 Gurbacki, H.M., "Unsteady Flowfield about an Iced Airfoil" 2004

5 Mentor, F.R., "Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications" 32 (32): 1598-1605, 1994

6 Deck, S., "Recent Improvements in the Zonal Detached Eddy Simulation (ZDES) Formulation" 26 (26): 523-550, 2012

7 Jacobs, J.J., "Particle Image Velocimetry Measurements of the Separation Bubble on an iced airfoil" 2006

8 Ahn, G.B., "Numerical and Experimental Investigation of Ice Accretion on Rotorcraft Engine air Intake" 52 (52): 903-909, 2015

9 Bragg, M.B., "Measurements in a Leading-Edge Separation Bubble Due to a Simulated Airfoil Ice Accretion" 30 (30): 1462-1467, 1992

10 Raj, L.P., "Ice Accretion and Aerodynamic Effects on a Multi-Element Airfoil Under SLD Icing Condition" 85 : 320-333, 2019

11 Gursul, I., "High Aerodynamic Loads on an Airfoil Submerged in an Unsteady Stream" 30 (30): 1117-1119, 1992

12 Broeren, A.P., "Flowfield measurements about an airfoil with leading-edge ice shapes" 43 (43): 1226-1234, 2006

13 Lee, S., "Experimental Investigation of Simulated Large-Droplet Ice Shapes on Airfoil Aerodynamics" 36 (36): 844-850, 1999

14 Kim, H.S., "Effects of Leading-Edge Ice Accretion Geometry on Airfoil Performance" 1999

15 Pan, J., "Detached Eddy Simulations for Iced Airfoils" 42 (42): 1452-1461, 2005

16 이가빈, "DDES와 IDDES를 이용한 Aerospatiale A-airfoil 주위 천이 유동 해석" 한국전산유체공학회 24 (24): 1-7, 2019

17 Spalart, P.R., "Comments on the Feasibility of LES for Wings, and on a Hybrid RANS/LES Approach" 1 : 4-8, 1997

18 Assam, A., "An Automatic Wall Treatement for Spalart-Allmaras Turbulence Model" 140 : 2018

19 Lilly, D., "A Proposed Modification of the Germano Subgrid Closure Method" 4 : 633-635, 1992

20 Shur, M.L., "A Hybrid RANS-LES Approach with Delayed-DES and Wall-Modelled LES Capabilities" 29 (29): 1638-1649, 2008

21 Germano, M., "A Dynamic Subgrid-Scale Eddy Viscosity Model" 3 : 1760-1765, 1991

22 Shim, J., "A Comparison of Turbulence Modeling in Flow Analysis of Iced Airfoils" 2000

23 Jung, S.K., "A CFD Analysis on Effcts of Ice Accretions on Characteristics of Stall and Drag in Airfoil Aerodynamics" 2009