Browse > Article

PERFORMANCE EVALUATION OF LARGE EDDY SIMULATION FOR TURBULENT FLOW BEHIND A BLUFF-BODY  

Kong, Min-Suk (인하대학교 대학원 기계공학과)
Hwang, Cheal-Hong (인하대학교 기계공학과)
Lee, Chang-Eon (인하대학교 기계공학과)
Kim, Se-Won (한국생산기술연구원)
Publication Information
Journal of computational fluids engineering / v.11, no.4, 2006 , pp. 32-38 More about this Journal
Abstract
The objective of this study is to evaluate the prediction accuracy of development large eddy simulation(LES) program for turbulent flow behind a bluff-body. The LES solver was implemented on parallel computer consisting 16 processors. To verify the capability of LES code, the results were compared with those of Reynolds Averaged Navier-Stokes(RANS) using standard ${\kappa}-{\varepsilon}$ model as well as experimental data. The results showed that the LES and RANS qualitatively well predicted the experimental results, such as mean axial, radial velocities and turbulent kinetic energy. In the quantitative analysis, however, the LES showed a better prediction performance than RANS. Specially, the LES well described characteristics of the recirculation zones, such as air stagnation point and jet stagnation point. Finally, the unsteady phenomena on the Bluff-body, such as the transition of recirculation region and vorticity, was examined with LES methodology.
Keywords
Large eddy simulation; Bluff-body; Bluff-body stabilized flow; Turbulent flow; Practical combustor;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Hwang, C.H. and Lee, C.E., 2005, "Development of Large Eddy Simulation for Isothermal Flows over Backward-facing Step," The Sixth KSME-JSME Thermal and Fluids Engineering Conference, pp.54.
2 Poinsot, T.J. and Lele, S.K., 1992, "Boundary Conditions for Direct Simulations of Compressible Viscous Flows," J. Computational Physics, Vol.101, pp.104-129.   DOI   ScienceOn
3 이창언, 오수철, 1994, "재순환류가 존재하는 난류확산화염에 관한 연구(제2보 : 수치해석적 연구)," 한국항공우주학회지, Vol.22, No.6, pp.45-55.
4 Poinsot, T. and Vyunante, D., 2001, Theoretical Numerical Combustion, Edwards.
5 Kim, W.W. and Menon, S., 1995, "A New Dynamic One-Equation Subgrid-Scale Model for Large-Eddy Simulations," AIAA-95-0356.
6 Lee, C.E. and Onuma, Y., 1994, "Experimental Study of Turbulent Diffusion Flames Stabilized on a Bluff Body," JSME International Journal, Vol.37, No.1, pp.165-171.   DOI   ScienceOn
7 Menon, S., Yeung, P.K. and Kim, W.W., 1996, "Effect of Subgrid Models on the Computed Interscale Energy Transfer in Isotropic Turbulence," Computers and Fluids, Vol.25, No.2, pp.165-180.   DOI   ScienceOn
8 Kempf, A., Lindstedt, R.P. and Janicka, J., 2005, "Large-Eddy Simulation of a Bluff-Body Stabilized Nonpremixed Flame," Combustion and Flame, in press.
9 황철홍, 이창언, 2005, "재순환 및 선회 유동에 대한 대와동모사(LES)의 성능검토," 대한기계학회 논문집 B권, Vol.30, No.4, pp.364-372.
10 Raman, V. and Pitsch, H., 2005, "Large-Eddy Simulation of a Bluff-Body-Stabilized Non-Premixed Flame using a Recursive Filter-Refinement Proce- dure," Combustion and Flame, Vol.142, No.4, pp.329-347.   DOI   ScienceOn
11 Koutmos, P. and Marazioti, P., 2001, "Identification of Local Extinction Topology in Axisymmetric Bluff-Body Diffusion Flames with a Reactedness-Mixture Fraction Presumed Probability Density Function Model," Int. J. Numer. Meth. Fluids, Vol.35, pp.939-959.   DOI   ScienceOn
12 Jenny, P., Muradoglu, M., Liu, K., Pope, S.B. and Caughey, D.A., 2001, "PDF Simulations of a Bluff- Body Stabilized Flow," Journal of Computational Physics," Vol.169, pp.1-23.   DOI   ScienceOn
13 Gosman, A.D. and Ideriah F.J.K., 1976, "A General Computer Program for Two-Dimensional Turbulent Recirculating Flows," Report, Dep. of Mech. Eng., Imperial College, London.
14 Huang, Y., Sung, H.G., Hsieh, S.Y. and Yang, V., 2003, "Large-Eddy Simulation of Combustion Dynamics of Lean-Premixed Swirl-Stabilized Com- bustor," Journal of Propulsion and Power, Vol.19, No.5, pp.782-794.   DOI   ScienceOn
15 Dally, B.B., Fletcher, D.F. and Masri, A.R., 1998, "Flow and Mixing Fields of Turbulent Bluff-Body Jets and Flames," Combust Theory Modelling, Vol.2, pp.193-219.   DOI   ScienceOn