| 徐勇,王丽娜,刘忠伟,朱爱民,赵国利.DBD等离子体中OH自由基数值模拟研究[J].,2010,(5):625-630 |
| DBD等离子体中OH自由基数值模拟研究 |
| Numerical simulation of OH radical in dielectric barrier discharge plasma |
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| DOI：10.7511/dllgxb201005001 |
| 中文关键词: 介质阻挡放电 OH 化学动力学 模拟 |
| 英文关键词: dielectric barrier discharge OH chemical kinetics simulation |
| 基金项目:国家自然科学基金资助项目(10475015；10975029)；北京印刷学院印刷包装材料与技术北京市重点实验室开放课题资助项目(23190110054). |
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| 中文摘要: |
| 在介质阻挡放电H 2O/He体系中通过解Boltzmann方程，得到电子能量分布函数，利用得到的电子能量分布函数计算电子-分子碰撞反应速率常数．建立了应用于介质阻挡放电的空间平均的化学动力学模型，研究了H 2O/He体系在介质阻挡放电中， OH(X 2Π)、 OH(A 2∑ +) 和电子的浓度随时间的演变以及不同气体组分对电子、OH(X 2Π)和 OH(A 2∑ +) 的产生及其时间演变的影响．结果表明 OH(X 2Π)、 OH(A 2∑ +) 的浓度随H 2O、O 2含量的增加先增大后减小，其规律与部分实验结果能够较好地符合．讨论并分析了产生上述结果的主要物理化学反应过程和机理． |
| 英文摘要: |
| Electron energy distribution functions for H 2O/He dielectric barrier discharge plasma were obtained by numerically solving the Boltzmann equation. The electron-molecule reaction coefficients were calculated using the computed electron energy distribution functions. A space averaged chemical kinetics model in dielectric barrier discharge was reported. The evolution of electron, OH (X 2Π)and OH (A 2∑ + ) produced in the H 2O/He dielectric barrier discharge plasma as a function of time was studied. The generation of electron, OH (X 2Π) and OH (A 2∑ +) as well as their evolution under the influences of various gas components was also discussed. The results show that the concentrations of OH (X 2Π) and OH (A 2∑ +) increase while H 2O or O 2 are at low concentration. However, the production of OH (X 2Π) and OH (A 2∑ +) decreases at higher H 2O or O 2 concentration The calculated result is compared with the experimental data, and they match well with each other. The reaction mechanisms and the main physicochemical processes involved are also discussed. |
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