氢气扩散火焰中辐射源项湍流脉动特征的PDF模拟

计算物理 ›› 2004, Vol. 21 ›› Issue (3): 346-350.

氢气扩散火焰中辐射源项湍流脉动特征的PDF模拟

徐晓¹, 刘林华¹, 陈义良², 王海峰²

1. 哈尔滨工业大学能源科学与工程学院, 黑龙江哈尔滨 150001;
2. 中国科学技术大学热科学系, 安徽合肥 230026

收稿日期:2003-03-12 修回日期:2003-09-17 出版日期:2004-05-25 发布日期:2004-05-25
作者简介:徐晓(1980-),女,浙江衢州,硕士生,从事湍流与辐射交互作用的研究.
基金资助:
国家自然科学基金(50176011)资助项目

PDF Simulation of Fluctuating Behavior of Radiative Source Term in Hydrogent Turbulent Jet Diffusion Flame

XU Xiao¹, LIU Lin-hua¹, CHEN Yi-liang², WANG Hai-feng²

1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;
2. Dept of Thermal Science & Energy Engineering, University of Science & Technology of China, Hefei 230036, China

Received:2003-03-12 Revised:2003-09-17 Online:2004-05-25 Published:2004-05-25

摘要/Abstract

摘要： 采用κ-ε湍流模型、标量联合的概率密度函数(PDF)输运方程和层流火焰面模型相结合,模拟氢气自由扩散火焰中辐射源项湍流脉动特征.给出了主燃区内辐射源项湍流脉动的频率图.辐射源项的样本点分布集中,大约95%以上的样本落在其系综的±3倍方差以内,频谱图为单峰.

关键词: 湍流扩散火焰, 层流火焰面模型, 概率密度函数, 辐射源项

Abstract: The laminar flamelet model in combination with joint probability density function (PDF) transport equation of mixture fraction and turbulence frequency is used to simulate fluctuating behavior of radiative source term in turbulent jet diffusion flames of hydrogen.The frequency distributions of radiative source terms in the combustion zone are calculated. The results show that, for the given ensemble, about 95% samples of radiative source term locate within the region of ±3.0 standard deviation of the mean radiative source term. The profile of frequency distribution indicates having a single peak.

Key words: turbulent diffusion flame, laminar flamelet model, probability density function, radiative source term

中图分类号:

TK124

徐晓, 刘林华, 陈义良, 王海峰. 氢气扩散火焰中辐射源项湍流脉动特征的PDF模拟[J]. 计算物理, 2004, 21(3): 346-350.

XU Xiao, LIU Lin-hua, CHEN Yi-liang, WANG Hai-feng. PDF Simulation of Fluctuating Behavior of Radiative Source Term in Hydrogent Turbulent Jet Diffusion Flame[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2004, 21(3): 346-350.

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