Knowledge Management System of Institue of Mechanics, CAS
| 层流等离子体发生器的研究 | |
| 张文华 | |
| Thesis Advisor | 吴承康 |
| 1999 | |
| Degree Grantor | 中国科学院研究生院 |
| Place of Conferral | 北京 |
| Subtype | 硕士 |
| Degree Discipline | 流体力学 |
| Keyword | 层流等离子体射流 热等离子体 发生器 数值模拟 Laminar Plasma Jet Thermal Plasma Plasma Generator Numerical Simulation |
| Other Abstract | 在本文的工作中，研制出了大气压层流等离子体发生器，并从试验和数值模拟两个方面对层流等离子体射流的特征和发生机理进行了分析和研究。试验观察表明，与湍流等离子体射流相比，层流等离子体射流有明显的特点，射流长而细，与周围环境气体掺混很少，能量的衰减很慢，而且几乎没有噪音。在层流等离子体发生器的研制过程中，研究了层流等离子体射流的产生机理，结果表明，工作气体流量、电源的输出特性、进气方式、电压的大小、发生器的结构和加工等对层流等离子体射流的产生有重要影响。本文还对层流和湍流等离子体射流进行了数值模拟，结果表明，工作气体的流量对层流等离子体的射流的长度有较大的影响；发生器出口的射流初始湍流度对射流的流动状态和长度也有很大的影响。数值模拟的结果和试验观察到的现象是一致的。; A kind of atmospheric-pressure laminar jet plasma generator is developed and the characteristics and mechanism of generation of the laminar plasma jet was investigated experimentally and numerically. Experimental results show that, unlike the turbulent plasma jet, the laminar plasma jet is much longer and more slender and its energy is sustained over a long distance almost with no noise. Working gas flow rate, characteristics of power supply, manner of gas introduction, voltage of arc, structure of generator all influence the production of laminar plasma jet. The numerical simulation of laminar and turbulent plasma jets was also carried out. The results show that appropriate working gas flow rate is crucial to the generation of ideal laminar plasma jet and the intensity of turbulence at the outlet of plasma generator will strongly affect the state (laminar or turbulent) and the length of plasma jet. |
| Call Number | 29858 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/24336 |
| Collection | 力学所知识产出(1956-2008) |
| Recommended Citation GB/T 7714 | 张文华. 层流等离子体发生器的研究[D]. 北京. 中国科学院研究生院,1999. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 层流等离子体发生器的研究.pdf（12689KB） | 开放获取 | -- | Application Full Text | |||
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