초음속 기저유동의 우수한 예측을 위한 DES 모델상수의 동적 보정

국문 초록 (Abstract)

강한 압축성을 갖는 유동의 DES 해석에서, 일반적인 경험상수 CDES 값 0.65를 사용할 경우 경계층 내에서 인위적으로 LES 모드로 수행된다. 본 연구에서는 S-A DES 모델에서 RANS 모드 보호를 위하여 사용되는 난류 길이와 벽거리 비의 분포 함수를 이용한 CDES의 동적 결정 방법을 제시하였다. 동적 CDES 결정식을 초음속 기저 유동장에 적용한 결과 다른 모델 상수를 사용한 기존의 연구 결과에 비하여 우수한 예측을 보여주었다.

다국어 초록 (Multilingual Abstract)

The DES analysis of strong compressibility flow, LES mode is intentionally performed in boundary layer with the conventional empirical constant CDES value of 0.65. In this study, an expression is suggested to determine the CDES value dynamically by using a distribution function of the ratio of turbulence length scale and wall distance which is used in S-A DDES model for RANS mode protection. The application of the dynamic CDES presents better prediction than previous results those used constant but different CDES values.

목차 (Table of Contents)

• ABSTRACT
• 초록
• Ⅰ. 서론
• Ⅱ. 유동장 모델 및 해석방법
• Ⅲ. 모델 상수 C_DES 값의 결정
• Ⅳ. 동적 C_DES를 이용한 해석 결과
• Ⅴ. 결론
• 후기
• 참고문헌

참고문헌 (Reference)

1 신재렬, "초음속 유동장에소 기저 분출 유동의 대와류 모사" 332-335, 2008

2 신재렬, "초음속 유동에서 기저유동의 Detached Eddy Simulation" 한국항공우주학회 37 (37): 955-966, 2009

3 Zhong, B, "k-l based hybrid LES/RANS approach and its application to heat transfer simulation" 46 : 983-1005, 2004

4 Abe, K, "hybrid LES/RANS approach using an anisotropy resolving algebraic turbulence model" 26 : 204-222, 2005

5 Menter, F.R, "Zonal Two-equation k-w Turbulence Model for Aerodynamic Flows" 1993

6 Spalart, P.R, "Young Person's Guide to Detached Eddy Simulation Grids"

7 Speziale, C.G, "Turbulence modelling for time-dependent RANS and VLES:A review" 36 : 173-184, 1998

8 Wolfshtein, M, "The velocity and temperature distribution in one-dimensional flow with turbulence augmentation and pressure gradient" 12 : 301-31, 1969

9 Menter, F.R., "Ten Years of Industrial Experience with the SST Turbulence Model, in Turbulence, Heat and Mass Transfer 4" Begell House 2003

10 Herrin, J.L, "Supersonic Near-Wake Afterbody Boattailing Effects on Axisymmetric Bodies" 31 (31): 1021-1038, 1994

11 Comte-Bellot, G, "Simple Eulerian time correlation of full-and narrow-band velocity signals in grid generated 'isotropic' turbulence" 48 : 273-337, 1971

12 Simon, F, "Reynolds-Averaged Navier Stokes/Large-Eddy Simulations of Supersonic Base Flow" 44 (44): 2578-2590, 2006

13 Fureby, C, "Large eddy simulation of rearward-facing step flow" 37 : 1401-1411, 1999

14 Constantinescu, G.S, "LES and DES Investigations of Turbulent Flow Over a Sphere" 2000

15 Baurle, R.A, "Hybrid Simulation Approach for Cavity Flows:Blending,Algorithm and Boundary Treatment Issues" 41 (41): 1463-1480, 2003

16 Scotti, A, "Generalized Smagorinsky Model for Anisotropic Grids" 5 (5): 2306-2308, 1990

17 Rumsey, C.L, "Efficiency and Accuracy of Time-Accurate Turbulent Navier-Stokes Computations" 25 (25): 217-236, 1996

18 Shur, M, "Detached-eddy simulation of an airfoil at high angle of attack" 669-678, 1999

19 Forsythe, J.R, "Detached Eddy Simulation with Compressibility Corrections Applied to a Supersonic Axisymmetric Base Flow" 124 : 911-923, 2002

20 Strelets, M.K, "Detached Eddy Simulation of Massively Separated Flows" 2001

21 Kawai, S, "Computational Study of Supersonic Base Flow Using Hybrid Turbulence Methodology" 43 (43): 1265-1275, 2005

22 Shur, M, "Comparative Numerical Testing of One-and Two-Equation Turbulence Models for Flows with Separation and Reattachment" 1995

23 Spalart, P.R, "Comments on the feasibility of LES for wings,and on a hybrid RANS/LES approach" 1997

24 Yoshizawa, A, "Bridging between eddy-viscosity-type and second order models using a two-scale turbulence theory" 48 (48): 273-281, 1993

25 Nichols, R.H, "Application of hybrid RANS/LES turbulence models" 2003

26 Kim, K.H, "Accurate,efficient and monotonic numerical methods for multi-dimensional compressible flows Part II:Multi-dimensional limiting process" 208 : 570-615, 2005

27 Spalart, P.R, "A new version of detached-eddy simulation, resistant to ambiguous grid densities" 20 : 181-195, 2006

28 Abe, K, "A new turbulence model for predicting fluid flow and heat transfer in separating and re-attaching flows-I,Flow field calculations" 37 : 139-151, 1994

29 Temmerman, L, "A hybrid two-layer URANS–LES approach for large eddy simulation at high Reynolds numbers" 26 : 173-190, 2005

30 Spalart, P.R, "A One Equation Turbulence Model for Aerodynamic Flows" 1992