Large Eddy Simulation of turbulent flow around a bluff body inside a sudden expansion cylindrical chamber

급 확대부를 갖는 실린더 챔버 내부의 둔각물체 주위 유동에 관한 대 와동 모사

  • Published : 2004.01.01

Abstract

This study concerns a large eddy simulation (LES) of turbulent flow around a bluff body inside a sudden expansion cylindrical chamber, a configuration which resembles a premixed gas turbine combustor The simulation code is constructed by using the general coordinate system based on the physical contravariant velocity components. The Smagorinsky model is employed and the calculated Reynolds number is 5,000 based on the bulk velocity and the diameter of the inlet pipe. The combined grid technique and cylindrical grid are tested in the numerical simulation with complex geometry. The predicted turbulent statistics are evaluated by comparing with LDV measurement data. The numerical flow visualizations depict the behavior of turbulent mixing process behind the flame holder.

Keywords

References

  1. 9th Symp. on Turbulent Shear Flows Numerical simulation of turbulent pre-mixed flame around a bluff body using the k-ε and flamelet models Amano,K.;Inage,S.;Yamakata,M.;Taniguchi,M.
  2. 日本機械學會 論文集 B v.60 no.544 ダンブディフュ-ザ內の流動機構に關する硏究 佐藤篤;志澤高郎;本阿彌眞治
  3. 日本機械學會 論文集 B v.60 no.580 ダンブディフュ-ザ形燃燒器に硏究 緖方秀樹;志澤高郎;本阿彌眞治
  4. J. Fluid Mech. v.315 Largeeddy simulation of turbulent confined coannular jets Akselvoll,K.;Moin,P.
  5. Proc. of 3rd JSME-KSME Fluid Engineering Conf. Largeeddy simulation of turbulent flow in the the straight circular pipe using the composite grid system S.Togashi;T.Kobayashi
  6. Monthly Weather Review v.91 General calculation experiments with the primitive equations, I, The basic experiment Smagorinsky,J.
  7. Computers and Fluid v.15 A Calculation precedure for turbulent flow in complex geometries Demirdzic,I.;Gosman,A.D.;Issa,R.I.;Peric,M.
  8. J. of the Aeronautical Scienecs v.23 On turbulent flow near a wall Van Driest, E. R.
  9. J. Comp. Phys. v.24 TOMCAT-A code for numerical generation of boundary fitted curvilinear coordinate system on fields containing any number of arbitary two dimensional bodies Tompson,J.F.(et al.)
  10. 한국박용기관학회 논문집 v.27 no.3 LES에 의한 원관 내 난류의 유동 해석 고상철
  11. Comp. Meth. Appl. Mech. and Eng. v.19 A stable and accurate convective modeling procedure based on quadratic upstream interpolation Leonard,B.P.
  12. J. Computational Physics v.10 Calculating three-dimensional flows around structures and over rough terrain Hirt,C.W.;Cook,J.L.
  13. JSME int. Journal B v.37 no.2 Large eddy simulation of plane turbulent jet using a new outlet velocity boundary condition Dai,Y.;Kobayashi,T.;Taniguchi,N.