Advanced SearchSearch Tips
A New k- Model for Prediction of Transitional Boundary-Layer Under Zero-Pressure Gradient
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A New k- Model for Prediction of Transitional Boundary-Layer Under Zero-Pressure Gradient
Baek, Seong-Gu; Im, Hyo-Jae; Jeong, Myeong-Gyun;
  PDF(new window)
A modified model is proposed for calculation of transitional boundary layer flows. In order to develop the eddy viscosity model for the problem, the flow is divided into three regions; namely, pre-transition region, transition region and fully turbulent region. The pre-transition eddy-viscosity is formulated by extending the mixing length concept. In the transition region, the eddy-viscosity model employs two length scales, i.e., pre-transition length scale and turbulent length scale pertaining to the regions upstream and the downstream, respectively, and a universal model of stream-wise intermittency variation is used as a function bridging the pre-transition region and the fully turbulent region. The proposed model is applied to calculate three benchmark cases of the transitional boundary layer flows with different free-stream turbulent intensity (1%∼6%) under zero-pressure gradient. It was found that the profiles of mean velocity and turbulent intensity, local maximum of velocity fluctuations, their locations as well as the stream-wise variation of integral properties such as skin friction, shape factor and maximum velocity fluctuations are very satisfactorily predicted throughout the flow regions.
k- Model;Bypass Transition;Pre-Transition Region;Intermittency;Boundary-Layer;Mixing-Length;Flat Plate;
 Cited by
수치 모사를 통한 이중원호 익렬의 성능 예측,정명균;오재민;팽기석;송재욱;

대한기계학회논문집B, 2002. vol.26. 3, pp.432-438 crossref(new window)
Mayle, R. E., 1991, 'The Role of Laminar-Turbulent Transition in Gas Turbine Engines,' ASME J. Turbo., Vol. 113, pp. 509-537

Morkovin, M. W., 'Instability, Transition to Turbulence and Receptivity,' AGARD-AG-236

Cebeci, T. and Smith, A. M. O., 1974, Analysis of Turbulent Boundary Layers, Academic press, Orland, FL

Rodi, W., Mansour, N. N. and Michelassi, V., 1993, 'One-Equation Near- Wall Turbulence Modeling with The Aid of Direct Simulation Data,' ASME J. Fluids Eng. Vol. 115, pp. 196-205

Savill, A. M., 1995, 'A Summary Report on the COST ERCOFTAC Transition SIG Project Evaluating Turbulence Models for Predicting Transition,' ERCOFTAC Bulletin, Vol. 24, pp. 57-61

Launder, B. E. and Shama, B. I., 1974, 'Application of The Energy-Dissipation Model of Turbulence to The Calculation of Flow Near A Spining Disc,' Letters in Heat and Mass Transfer, Vol. 1, pp. 131-138 crossref(new window)

Rollce-Royce, 1993, transmittal by J. Coupland of data from Rollce-Royce Applied Science Laboratory

Westin, K. J. A. and Henkes, R. A. W. M., 1997, 'Application of Turbulence Models to Bypass Transition,' ASME J. Fluids Engng., Vol. 119, pp. 859-866

Young, T. W., Warren, E. S., Harris, J. E., and Hassan, H. A., 1993, 'New Approach for The Calculation of Transition Flows,' AIAA, Vol. 31, pp. 629-636

Savill, A. M., 1995, 'The SLY RST Intermittency Model for Predicting Transition,' ERCOFTAC Bulletin, Vol. 24, pp. 37-41

Cho, J. R. and Chung, M. K, 1992, 'A ${\kappa}-{\varepsilon}-{\gamma}$ Equation Turbulence Model,' J Fluids Mech., Vol. 237, pp. 301-322 crossref(new window)

Mayle, R. E. and Schulz A., 1997, 'The Path to Predicting Bypass Transition,' ASME J. Turbo., Vol. 119, pp. 405-411

Westin, K. J. A., Boiko, A. V., Klingmann, B. G. B., Kozlov, V. V., and Alfredsson, P. H., 1994, 'Experiments in A Boundary Layer Subjected to Free Stream Turbulence. Part 1. Boundary Layer Structure and Receptivity,' J. Fluids Mech., Vol. 281, pp. 193-218 crossref(new window)

Voke, P. R. and Yang, Z., 1995, 'Numerical Study of Bypass Transition,' Phys. Fluids, Vol. 7, No.9, pp. 2256-2264 crossref(new window)

Volino, R. J. and Simon, T. W., 1994, 'An Application of Octant Analysis to Turbulent and Transitional Flow Data,' ASME J. Turbo., Vol. 116, pp. 752-758

Wang, T. and Zhou, D., 1996, 'Spectral Analysis of Boundary Layer Transition in A Heated on Flat Plate,' Int. J. Heat and Fluid Flow, Vol. 17, pp. 12-21 crossref(new window)

Blair, M. F., 1992, 'Boundary-Layer Transition in Accelerating Flows with Intense Freestream Turbulence; Part 2-The Zone of Intermittent Turbulence,' ASME J. Fluids Eng., Vol. 114, pp. 322-332

Yang, Z. and Shih, T. H., 1993, 'New Time Scale Based ${\kappa}-{\varepsilon}$ Model for Near-Wall Turbulence,' AIAA, Vol. 31, No.7, pp. 1191-1198

Nagano, Y. and Tagawa, M., 1990, 'An Improved ${\kappa}-{\varepsilon}$ Model for Boundary Layer Flows,' ASME., J. Fluids Eng., Vol. 102, pp. 33-39

Wilcox, D. C., 1998, Turbulence Modeling for CFD, DCW Industries, Inc., California

Narashima, R., 1985, 'Subtransition in The Transition Zone,' IUTAM Symposium, Novosbirsk, USSR, p. 141