A modular RANS approach for modelling laminar-turbulent transition in turbomachinery flows

被引:55
作者
Wang, Liang [1 ,2 ]
Fu, Song [2 ]
Carnarius, Angelo [1 ]
Mockett, Charles [1 ,3 ]
Thiele, Frank [1 ,3 ]
机构
[1] Berlin Univ Technol, Inst Fluid Mech & Engn Acoust, D-10623 Berlin, Germany
[2] Tsinghua Univ, Sch Aerosp Engn, Beijing 100084, Peoples R China
[3] CFD Software Entwicklungs & Forschungsgesell MbH, D-14163 Berlin, Germany
关键词
Transition modelling; Elliptic approach; Intermittency factor; Turbomachinery; BYPASS TRANSITION; BOUNDARY-LAYER; PREDICTION;
D O I
10.1016/j.ijheatfluidflow.2012.01.008
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this study we propose a laminar-turbulent transition model, which considers the effects of the various instability modes that exist in turbomachinery flows. This model is based on a K-omega-gamma three-equation eddy-viscosity concept with K representing the fluctuating kinetic energy, omega the specific dissipation rate and gamma the intermittency factor. As usual, the local mechanics by which the freestream disturbances penetrate into the laminar boundary layer, namely convection and viscous diffusion, are described by the transport equations. However, as a novel feature, the non-local effects due to pressure diffusion are additionally represented by an elliptic formulation. Such an approach allows the present model to respond accurately to freestream turbulence intensity properly and to predict both long and short bubble lengths well. The success in its application to a 3-D cascade indicates that the mixed-mode transition scenario indeed benefits from such a modular prediction approach, which embodies current conceptual understanding of the transition process. (C) 2012 Elsevier Inc. All rights reserved.
引用
收藏
页码:62 / 69
页数:8
相关论文
共 31 条
[1]   Laminar-turbulent transition prediction in three-dimensional flows [J].
Arnal, D ;
Casalis, G .
PROGRESS IN AEROSPACE SCIENCES, 2000, 36 (02) :173-191
[2]   A KAPPA-EPSILON-GAMMA EQUATION TURBULENCE MODEL [J].
CHO, JR ;
CHUNG, MK .
JOURNAL OF FLUID MECHANICS, 1992, 237 :301-322
[3]  
Coupland J., 1990, ERCOFTAC SPECIAL INT
[4]  
COUPLAND J, 1995, ERCOFTAC B, V24, P5
[5]  
DHAWAN S, 1958, J FLUID MECH, V3, P414
[6]   A REYNOLDS STRESS MODEL FOR NEAR-WALL TURBULENCE [J].
DURBIN, PA .
JOURNAL OF FLUID MECHANICS, 1993, 249 :465-498
[7]  
Fu S., 2009, 7 IUTAM S LAM TURB T
[8]   Natural transition phenomena on an axial compressor blade [J].
Hughes, JD ;
Walker, GJ .
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 2001, 123 (02) :392-401
[9]   Simulations of bypass transition [J].
Jacobs, RG ;
Durbin, PA .
JOURNAL OF FLUID MECHANICS, 2001, 428 :185-212
[10]  
Koezulovic D., 2007, 7 EUR TURB C