Algebraic second-order moment model for simulation of turbulent non-premixed combustion

SUI Chunjie; ZHOU Lixing; LIN Boying; KONG Wenjun

doi:10.3969/j.issn.0438-1157.2014.02.007

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Algebraic second-order moment model for simulation of turbulent non-premixed combustion

更新时间：2025-12-10

- Algebraic second-order moment model for simulation of turbulent non-premixed combustion
- CIESC Journal Issue 2, Pages: 415-421(2014)
- 作者机构：
  
  1. 中国科学院轻型动力重点实验室, 工程热物理研究所,北京,100190
  2. 中国科学院大学,北京,100039
  3. 清华大学航天航空学院,北京,100084
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.02.007
  CLC： K16
- Online First：05 February 2014，
  
  Published：05 February 2014
- 稿件说明：
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SUI Chunjie, ZHOU Lixing, LIN Boying, et al. Algebraic second-order moment model for simulation of turbulent non-premixed combustion[J]. CIESC Journal, 2014, (2): 415-421.
DOI：

SUI Chunjie, ZHOU Lixing, LIN Boying, et al. Algebraic second-order moment model for simulation of turbulent non-premixed combustion[J]. CIESC Journal, 2014, (2): 415-421. DOI： 10.3969/j.issn.0438-1157.2014.02.007.

摘要

湍流燃烧数值模拟是研究燃烧的一种重要手段，采用的湍流燃烧模型是否恰当直接影响最终结果的准确性。在湍流燃烧中，化学反应速率不仅取决于当地的组分浓度和温度，而且与组分的湍流脉动也有密切关系。通过对湍流燃烧模型进行探讨，发现代数二阶矩模型（ASOM）能综合考虑湍流和反应动力学因素的影响，而且比其他复杂的模型简单。研究将组分混合速率对化学反应速率的影响在一个修正的代数二阶矩模型（RASOM）中进行考虑，更准确地计算出化学反应速率。为了验证模型的准确性，RASOM模型被应用到Sandia实验室测量的甲烷-空气非预混燃烧（Flame-D）的数值模拟中。模拟得到的结果与实验结果以及修正的涡破碎模型（EBU-A）和原ASOM模型的结果进行了对比，发现RASOM模型的效果较好。

Abstract

Numerical simulation is an effective tool for studying combustion

in which the combustion model influences the results significantly. In turbulent combustion

the reaction rate not only depends on the local concentration of reactants and temperature

but also the turbulent condition. The algebraic second-order moment model (ASOM) can consider these conditions and is simpler than other models. In this study

mixing rate is considered in a modified ASOM model (RASOM). The reaction rate is calculated more accurately with RASOM in a partially stirred reactor

using the chemical time scale and the mixing time scale to demonstrate the influence of mixing rate. Simulations for a piloted methane/air diffusion flame (Sandia flame D) are carried out to verify the model. RASOM and eddy break-up model are applied in the simulations. The results are compared to experimental data of the mean axial velocity

average temperature

and mass fraction of O2. Results from ASOM are also used in the comparison. Although the RASOM predicts the result improperly at some locations

it is more appropriate than EBU-A and ASOM. And the effect of mixing rate on the reaction rate in RASOM is discussed in detail.

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