计算物理 ›› 2011, Vol. 28 ›› Issue (1): 27-34.

• 研究论文 • 上一篇    下一篇

变密度随机涡模型在湍流射流扩散火焰中的应用

朱跃进, 董刚, 刘怡昕, 范宝春   

  1. 南京理工大学瞬态物理重点实验室, 江苏 南京 210094
  • 收稿日期:2010-01-08 修回日期:2010-05-07 出版日期:2011-01-25 发布日期:2011-01-25
  • 通讯作者: 董刚,E-mail:dgvehicle@yahoo.com
  • 作者简介:朱跃进(1986-),男,江苏江都,博士生,主要从事计算流体力学和化学反应流的数值模拟.
  • 基金资助:
    国家自然科学基金(10972107)资助项目

Numerical Simulation of Turbulent Jet Diffusion Flame in a Variable-density Stochastic Vortex Model

ZHU Yuejin, DONG Gang, LIU Yixin, FAN Baochun   

  1. Science and Technology on Transient Physics Laboratory, Nanjing University of Science and Technology, Nanjing 210094, China
  • Received:2010-01-08 Revised:2010-05-07 Online:2011-01-25 Published:2011-01-25

摘要: 采用变密度随机涡模型,对H2/O2/N2湍流射流扩散火焰进行数值模拟,湍流过程通过涡的采样、涡的抑制和涡的翻转实现.其中,针对变密度反应流问题,提出一种大涡抑制的新机制,并详细讨论各种参数对模型预测效果的影响.计算结果表明,修改后的模型可以合理预测H2/O2/N2射流火焰结构,能够反映湍流的涡特性;模型中与涡采样和涡抑制有关的参数对预测结果有一定影响.

关键词: 变密度随机涡模型, 大涡抑制, 化学反应, 数值模拟

Abstract: A variable-density stochastic vortex model is used in simulating H2/O2/N2 turbulent jet diffusion flames,in which turbulence is modeled by vortex sample,vortex suppression and vortex turnover.A large-vortex suppression mechanism for variable density reacting flows is presented and effects of parameters in model prediction are discussed in detail.It shows that the modified model can predict reasonably H2/O2/N2 jet flame structures,and reflect characteristics of turbulent vortices.It also reveals that various parameters in vortex sample and vortex suppression affect results of the model.

Key words: variable-density stochastic vortex model, large-vortex suppression, chemical reaction, numerical simulation

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