| 磁控等离子体对尾喷管壁传热特性的影响 |
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| 引用本文： | 黄护林,张炎. 磁控等离子体对尾喷管壁传热特性的影响[J]. 航空动力学报, 2007, 22(8): 1209-1215 |
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| 作者姓名： | 黄护林 张炎 |
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| 作者单位： | 南京航空航天大学,高新技术研究院,南京,210016;南京航空航天大学,高新技术研究院,南京,210016 |
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| 基金项目： | 国家自然科学基金 , 航空基础科学基金 |
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| 摘 要： | 根据磁场作用下等离子体的湍流和传热能力将受到抑制的现象, 提出利用磁场控制低温等离子体隔离高温燃气与喷管壁的方法, 以减少高温燃气对壁面的传热, 从而达到降低壁面温度的目的.分别建立诱导磁场方程求解洛伦兹力和磁场作用下的k-ε湍流模型求解湍流粘度, 数值模拟了不同强度磁场作用下的磁控等离子体流动和传热特性.结果表明, 磁场能够有效地抑制湍流强度, 降低传热能力, 从而有效地降低壁面温度;并且磁场越强, 效果越明显.
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| 关 键 词： | 航空、航天推进系统 等离子体 诱导磁场方程 尾喷管 对流传热 |
| 文章编号： | 1000-8055(2007)08-1209-07 |
| 收稿时间： | 2006-07-12 |
| 修稿时间： | 2006-07-12 |
Effect of magnetic plasma on heat transfer characteristics of nozzle wall |
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| HUANG Hu-lin and ZHANG Yan. Effect of magnetic plasma on heat transfer characteristics of nozzle wall[J]. Journal of Aerospace Power, 2007, 22(8): 1209-1215 |
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| Authors: | HUANG Hu-lin and ZHANG Yan |
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| Affiliation: | Academy of Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | A new method, based on the concept that the turbulence and heat transfer of plasma are suppressed under the magnetic field, was proposed to separate the high temperature gas from nozzle wall by controlling the cold plasma with magnetic field.The purpose of this method is to reduce heat transfer from high-temperature gas to nozzle wall, thereby cutting down the wall temperature.The equation of induced magnetic field was set up to calculate the Lorentz force, and the modified k-ε turbulence model under magnetic force was used to measure the viscosity of turbulence.Numerical simulation was conducted to determine the flow and heat transfer characteristics of magnetic plasma under different magnetic fields.The results show that, the magnetic field could efficiently suppress the turbulence strength and reduce the heat transfer capability for lower nozzle wall temperature;the stronger the magnetic field, the more distinct the effects are. |
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| Keywords: | aerospace propulsion system plasma induced magnetic field nozzle convective heat transfer |
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