首页|利用简化的化学反应动力学模型耦合CFD代码模拟气体燃烧器中的烟黑生成

利用简化的化学反应动力学模型耦合CFD代码模拟气体燃烧器中的烟黑生成

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Modeling of Soot Formation in Gas Burner Using Reduced Chemical Kinetics Coupled with CFD Code
A computational study of soot formation in ethylene/air coflow jet diffusion flame at atmospheric pressure was conducted using a reduced mechanism and soot formation model. A 20-step mechanism was derived from the full mechanism using sensitivity analysis, reaction path analysis and quasi steady state (QSS) approximation. The model in premixed flame was validated and with computing savings in diffusion flame was applied by incorporating into a CFD code. Simulations were performed to explore the effect of coflow air on flame structure and soot formation. Thermal radiation was calculated by a discrete-ordinates method, and soot formation was predicted by a simple two-equation soot model. Model results are in good agreement with those from experiment data and detailed mechanism at atmospheric conditions. The soot nucleation, growth, and oxidation by OH are all enhanced by decrease in coflow air velocity. The peak soot volume fraction region appears in the lower annular region between the peak flame temperature and peak acetylene concentration locations, and the high soot oxidation rate due to the OH attack occurs in the middle annular region because of high temperature.

modelingchemical kineticssensitivity analysissoot formation

张引弟、周怀春、谢明亮、方庆艳、魏艳

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State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

modeling chemical kinetics sensitivity analysis soot formation

国家自然科学基金国家自然科学基金国家自然科学基金Program of Introducing Talents of Discipline to Universities of China ("111" Project )

508060235072100550806024B06019

2010

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDCSCDSCIEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2010.18(6)
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