Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical Simulation of the Evolution and Structure of a Single Vortex in Reacting and Non-reacting Jet Flow Fields

반응 및 비반응 제트 유동장에서 단일 와동의 전개 및 구조에 대한 수치모사

  • Published : 2004.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

A two-dimensional direct numerical simulation was performed to investigate the evolution and vortical structure of a single vortex in reacting and non-reacting jet flow fields. A predictor-corrector-type numerical scheme with a low Mach number approximation was used, and a two-step global reaction mechanism was adopted as the combustion model. Through the comparisons of single vortex behaviors in reacting and non-reacting jet flow fields, it was found that the evolution characteristics and vortical structure of the single vortex were significantly influenced by a outer vortex that was generated from the buoyance effect as well as the chemical heat release. Furthermore, it was also identified that the differences of the vortical structure in reacting and non-reacting jet flow fields were mainly attributed to the thermal expansion, Baroclinic torque and buoyance effect.

반응 및 비반응 유동장에서 단일와동의 전개 및 와(渦) 구조 검토를 위해 2 차원 직접 수치모사를 수행하였다. 수치기법으로는 낮은 마하수 근사법이 적용된 예측-교정자법이 적용되었으며, 연소모텔로는 2단계 총괄 반응식이 사용되었다. 반응 및 비반응 유동장에서 단일와동의 거동 비교를 통해, 와동의 전개특성 및 구조는 화학반응으로부터 생성된 열 뿐만 아니라 부력에 의해 생성된 외부 와동에 크게 영향을 받음을 확인하였다. 또한 반응장의 경우에 부피 팽창항, Baroclinic torque항 및 부력항에 의해 와동의 구조가 크게 변화될 수 있음을 알았다.

Keywords

References

  1. Thevenin, D., Renard, P. H., Fiechtner, G.J., Gord, J. R. and Rolon, J. C, "Regimes of Non-premixed Flame-Vortex Interactions," Proceeding of the Combustion Institute, Vol. 28, 2000, pp. 2101 - 2108. https://doi.org/10.1016/S0082-0784(00)80619-0
  2. Ashurst, W. T., "Vorticity Generation in a Nonpremixed Flame Sheet," Numerical Combustion, Lecture notes in Physics, Springer- Verlag, 1989, pp. 1-21.
  3. Ashurst, W. T., "Vortex Modification of Diffusion Flamelets," Proceeding of the Combustion Institute, Vol. 23, 1990, pp. 543-550.
  4. McMurtry, P. A., Jou, W. H., Riley, J. J. and Metcalfe, R. W., "Direct Numerical Simulations of a Reacting Mixing Layer with Chemical Heat Release," AIAA Journal, Vol. 24, No.6, 1986, pp. 962-970.
  5. McMurtry, P. A., Riley, J. J. and Metcalfe, R. W., "Effects of Heat Release on the Large-Scale Structure in Turbulent Mixing Layers," Journal of Fluid Mechanics., Vol. 199, 1989, pp. 297-332. https://doi.org/10.1017/S002211208900039X
  6. Hewett, J. S. and Madnia, C. K, "Flamevortex Interaction in a Reacting Vortex Ring," Physics of Fluids, Vol. 10, No.1, 1998, pp. 189 - 205. https://doi.org/10.1063/1.869560
  7. Jiang, X. and Luo, K. H., "Spatial Direct Numerical Simulation of the Large Vortical Structures in Forced Plumes," Flow Turbulence and Combustion, Vol. 64, pp. 43 -69. https://doi.org/10.1023/A:1009950127478
  8. Jiang, X. and Luo, K. H., "Combustion-Induced Buoyancy Effects of an Axisymmetric Reactive Plume," Proceeding of the Combustion Institute, Vol. 28, 2000, pp. 1989-1995. https://doi.org/10.1016/S0082-0784(00)80605-0
  9. Mueller, C. J. and Schefer, R. W., "Coupling of Diffusion Flame Structure to an Unsteady Vortical Flow-Field," Proceeding of the Combustion Institute, Vol. 27, 1998, pp. 1105-1112. https://doi.org/10.1016/S0082-0784(98)80512-2
  10. Katta, V. R., Hsu, K. Y. and Roquemore, W. M., "Local Extinction in an Unsteady Methane-Air Jet Diffusion Flame," Proceeding of the Combustion Institute, Vol. 27, 1998, pp. 1121-1129. https://doi.org/10.1016/S0082-0784(98)80514-6
  11. Cuenot, B. and Poinsot, T., "Effects of Curvature and Unsteadiness in Diffusion Flames. Implications for Turbulent Diffusion Combustion," Proceeding of the Combustion Institute, Vol. 25, 1994, pp. 1383-1390. https://doi.org/10.1016/S0082-0784(06)80781-2
  12. Oh, C. B., "Direct Numerical Simulation on the Interaction of Counterflow Nonpremixed Flame and a Single Vortex," Ph. D. Dissertation, lnha Universtity, 2003.
  13. Kee, R. J., Rupley, F. M. and Miller, J. A., "A Fortran Chemical Kinetic Package for the Analysis of Gas Phase Chemical Kinetics," SAND89-8009B, 1989.
  14. Kee, R. J., Dixon-Lewis, G., Warnatz, J., Coltrin, M. E. and Miller J. A., "A Fortran Computer Code Package for the Evaluation of Gas-Phase Multicomponent Transport Properties," SAND86-8246, 1986.
  15. Najm, H. S., Wyckoff, P. S. and Knio, O. M., "A Semi-implicit Numerical Scheme for Reacting Flow I -Stiff Chemistry," Journal of Computational Physics, Vol. 143, pp. 381-402. https://doi.org/10.1006/jcph.1997.5856
  16. Hirt, C. W. and Cook, J. L., "Calculating Three-Dimensional Flows around Structures and over Rough Terrain," Journal of Computat-ional Physics, Vol. 10, 1972, pp. 324 - 340. https://doi.org/10.1016/0021-9991(72)90070-8
  17. Oh, C. B. and Lee C. E., "Numerical Simulation of Unsteady $CH_{4}$/Air Jet Diffusion Flame," Transactions of KSME B, Vol. 25, No.8, pp. 1087 -1096.
  18. Dupont, V., Pourkashanian, M. and Williams, A., "Modeling of Process Heaters Fired by Natural Gas," Institute of Energy, Vol. 66, 2000, pp. 20 - 28.
  19. Hwang, C. H., Oh, C. B., Lee, D. Y., and Lee, C. E., "An Investigation on Dynamic Behaviors of Single Vortex with $CO_{2}$ Dilution in a $CH_{4}$-Air Jet Diffusion Flame," Transactions of KSME B, Vol. 27, No.9, pp. 1209-1219.
  20. Yoo, B. H., Oh, C. B., Hwang, C. H. and Lee, C. E., "Dynamic Behaviors of a Single Vortex in Counter Non-reacting and Reacting Flow-Field," Transactions of KSME B, Vol. 27, No.9, pp. 1262 -1272.