| 题名 | MHD燃煤燃烧室中煤粉燃烧和种子电离过程的数值模拟; MHD燃煤燃烧室中煤粉燃烧和种子电离过程的数值模拟 |
| 作者 | 1王朝阳,电工研究所 |
| 学位类别 | 硕士 |
| 答辩日期 | 2005-09-21 |
| 授予单位 | 中国科学院电工研究所 |
| 导师 | 1居滋象,电工研究所 |
| 关键词 | 磁流体发电（MHD） 三维湍流流动 煤粉燃烧 种子 电离 magnetohydrodynamic (MHD) three-dimension turbulent flows pulverized-coal combustion seed ionization |
| 其他题名 | MHD燃煤燃烧室中煤粉燃烧和种子电离过程的数值模拟 |
| 学位专业 | 电工理论与新技术 |
| 中文摘要 | 燃煤磁流体发电机燃烧室中燃烧、电离过程是一个异常复杂的物理化学过程，MHD燃烧室中进行着的湍流多相流动、多组分化学反应、种子高温蒸发电离等过程无一例外地体现了这种复杂性。对于这样的一个复杂的物理化学过程，我们可以用包括连续、动量、能量以及组份等一系列偏微分方程组加以描述。想要求解这样的一组偏微分方程，经典解析求解方法无能为力，我们只能通过计算机进行数值求解。本文针对电工所25MW MHD燃煤燃烧室中煤粉颗粒的气粒两相湍流流动燃烧、种子液滴的气液两相流动电离过程，建立了圆柱坐标三维湍流气粒、气液两相流动，煤粉高温燃烧以及种子蒸发电离的数学模型，研究了其数值解法，并在引进了清华大学的LEADGE－3大型燃烧计算软件的基础上，改进发展一个适用于电工所25MW MHD燃烧室流动、燃烧、电离过程的大型三维数值计算程序，并利用该程序在两种工况下对于燃烧室的燃烧、电离过程进行了模拟，并给出了两种工况下速度场、温度场、组份浓度场、电子数密度以及电导率的分布、电子数密度以及电导率随温度的变化等历程。模拟的结果清晰地反应了燃烧室工况的变化对于燃烧、电离的影响。本文所用的研究模型、研究方法以及程序也适用于其他的MHD燃煤燃烧室一般燃煤燃烧室的两相流动燃烧、种子蒸发电离的计算机仿真模拟，并可作为其优化设计的辅助手段。同时，其研究思想对于其他的湍流两相传热传质流动过程的数值模拟，也有较好的参考价值。 The combustion and ionization process of the MHD combustor is a very complicated physical chemistry process, in which mixed the turbulent multi-phase flow, the multi-species chemical reaction, the seed evaporation and ionization into one process. We can describe this complicated process with a series of partial-differential equation, including continuity equation, momentum equation, energy equation and species concentrate equation. But we can only solve those equations by computer numerical model instead of by classical analytic solution. This paper has developed a three-dimension mathematical model about turbulent gas-particle & gas-liquid flows, pulverized-coal high temperature combustion, and seed vaporization & ionization based on the combustor of 25MW MHD in IEE. We have also researched on its solution procedure and developed a computer code, which be introduced and improved from the LEADGE-3 computer code of Tsinghua University and can be used in numerical model on the combustion of 25 MW MHD in IEE. As an example, we have used that computer code modeling two case of combustion & ionization process of MHD combustor, and have given the distribution of gas velocity, temperature, species, electron concentration and electric conductivity, etc. In addition, we have compared the change electron concentration and electric conductivity versus temperature in that two case, which has different pressure. All of those graphics on the end of this paper clearly indicated the influence of some factor such as pressure on process of combustion and ionization in MHD combustor. The developed numerical model, solution procedure and computer code can be used for computer simulation of any other MHD combustor, as a tool of optimum design, and the idea of research can also suited for model other two-phased turbulent flows with heat transfer and mass conveyance. |
| 语种 | 中文 |
| 公开日期 | 2010-10-18 |
| 页码 | 73 |
| 内容类型 | 学位论文 |
| 源URL | [http://ir.iee.ac.cn/handle/311042/7205]  |
| 专题 | 电工研究所_其他部门_其他部门_硕士学位论文 |
| 推荐引用方式 GB/T 7714 | 1王朝阳,电工研究所. MHD燃煤燃烧室中煤粉燃烧和种子电离过程的数值模拟, MHD燃煤燃烧室中煤粉燃烧和种子电离过程的数值模拟[D]. 中国科学院电工研究所. 2005. |
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