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模型燃烧室紊流燃烧的大涡模拟 被引量:4

Large-Eddy Simulation of Turbulent Combustion in A Model Combustor
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摘要 采用了两种不同的亚网格尺度燃烧模型对带 V型稳定器的模型燃烧室紊流化学反应流动进行了大涡模拟 ,用 k-ε方程亚网格尺度模型确定亚网格紊流粘性 ,为了考虑热辐射对燃烧室壁温和气流温度的影响 ,运用热流法辐射模型估算热辐射通量 ,用 SIMPLE算法和混合差分求解大涡模拟各守恒方程 ,通过对两种不同亚网格尺度燃烧模型数值模拟结果与实验值的比较表明 ,两种燃烧模型都与实验值较吻合 ,但 G方程小火焰模型要比亚网格 Two different subgrid-scale combustion models were used for the Large-Eddy Simulation (LES) of turbulent chemical reaction flows in a model combustor with V-gutter flame holder. The subgrid eddy viscosity was determined by using k-equation subgrid-scale (KSGS) model. To take into account the influence of heat radiation on wall temperature and gas temperature distributions, heat flux model was applied to predict heat flux distributions. The LES equations were solved with SIMPLE algorithm and hybrid scheme. Comparison of numerical results with experimental data shows that the two different subgrid-scale combustion models can all be used to simulate the combustion, but the G-equation flamelet model is better than the EBU sub-grid combustion model. These results provide confidence that the LES may lead to a better understanding of the combustion process.
出处 《航空动力学报》 EI CAS CSCD 北大核心 2005年第1期86-91,共6页 Journal of Aerospace Power
基金 国家自然科学基金资助项目 ( 5 0 1760 17)
关键词 航空、航天推进系统 亚网格尺度燃烧模型 大涡模拟 G方程小火焰模型 Ⅴ型稳定器 紊流化学反应流 Aircraft propulsion Boundary conditions Chemical reactions Computer simulation Numerical methods Turbulent flow
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参考文献6

  • 1Kim W W,Menon S. A New Dynamic One-Equation SubgridScale Model for Large Eddy Simulations [R]. AIAA 95-0356,1995.
  • 2Ravikanth V R A, Richard H P. Large-Eddy Simulation of the Turbulent Flow Past A Backward Facing Step[R]. ,AIAA 2000- 0542,2000.
  • 3Stone C, Menon S. Simulation of Fuel-Air Mixing and Combustion in a Trapped-Vortex Combustor[R]. AIAA 20000478,2000.
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  • 6Menon S,Kim W-W,Stone C. Large-Eddy Simulation of Fuel-Air Mixing and Chemical Reactions in Swirling Flow Combustor[R]. AIAA 99- 3440,1999.

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