Affiliation:
1. Department of Mechanical Engineering, Clemson University, Clemson, SC 29634
Abstract
This paper presents the development and implementation of a new model for bypass and natural transition prediction using Reynolds-averaged Navier-Stokes computational fluid dynamics (CFD), based on modification of two-equation, linear eddy-viscosity turbulence models. The new model is developed herein based on considerations of the universal character of transitional boundary layers that have recently been documented in the open literature, and implemented into a popular commercial CFD code (FLUENT) in order to assess its performance. Two transitional test cases are presented: (1) a boundary layer developing on a flat heated wall, with free-stream turbulence intensity Tu∞ ranging from 0.2 to 6%; and (2) flow over a turbine stator vane, with chord Reynolds number 2.3×105, and Tu∞ from 0.6 to 20%. Results are presented in terms of Stanton number, and compared to experimental data for both cases. Results show good agreement with the test cases and suggest that the new approach has potential as a predictive tool.
Reference31 articles.
1. Walters, D. K., and Leylek, J. H., 2000, “Impact of Film-Cooling Jets on Turbine Aerodynamic Losses,” ASME J. Turbomach., 122, pp. 537–545.
2. Walters, D. K., and Leylek, J. H., 2002, “Computational Study of Film-Cooling Effectiveness on a Low-Speed Airfoil Cascade—Part II: Discussion of Physics,” ASME Paper No. DETC2002/CIE-34422.
3. Savill, A. M., 1993, “Some Recent Progress in the Turbulence Modelling of By-Pass Transition,” in Near-Wall Turbulent Flows, So, R. M. C., Speziale, C. G., and Launder, B. E. (eds.), Elsiver Science, New York, pp. 829–848.
4. Wilcox, D. C.
, 1994, “Simulation of Transition with a Two-Equation Turbulence Model,” AIAA J., 32, pp. 247–255.
5. Craft, T. J., Launder, B. E., and Suga, K., 1997, “Prediction of Turbulent Transitional Phenomena with a Nonlinear Eddy-Viscosity Model,” Int. J. Heat Fluid Flow, 18, pp. 15–28.
Cited by
199 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献