| 氮气喷射沉积镁合金传热过程分析 |
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| 引用本文： | 杨小霞,谭敦强,陈伟,肖冬飞. 氮气喷射沉积镁合金传热过程分析[J]. 特种铸造及有色合金, 2011, 31(12) |
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| 作者姓名： | 杨小霞 谭敦强 陈伟 肖冬飞 |
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| 作者单位： | 1. 南昌大学材料科学与工程学院
2. 中国兵器科学院宁波分院 |
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| 基金项目： | 国家自然科学基金资助项目(50904035); 广东省教育部产学研结合项目(2009B090300148,2010B090400244) |
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| 摘 要： | 针对氮气喷射沉积镁合金雾化过程中的快速散热阻燃行为,采用数学模型模拟了镁合金喷射沉积过程中雾化气体与液滴之间的传热情况.结果表明,雾化气体速度随着喷射距离的增加呈单调递减趋势；雾化液滴先加速飞行,在液滴和气体速度相等后开始减速,随着粒径增大,液滴的最大速度减小；传热系数先减小再增加,且随着液滴粒径减小而增大,其平均值均在l000W· m-2·K-1以上；液滴的温度持续降低；在雾化阶段,液滴与气体之间传热的最小速率远远大于反应放热的最大速率,避免了喷射沉积过程中热量的蓄积,从而保障了氮气喷射沉积制备镁合金过程的生产安全.
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| 关 键 词： | 喷射沉积 镁合金 模拟计算 传热分析 |
Analysis of Heat Transfer Process of Nitrogen Spray Deposition Magnesium Alloy |
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| Yang Xiaoxia , Tan Dunqiang , Chen Wei , Xiao Dongfei. Analysis of Heat Transfer Process of Nitrogen Spray Deposition Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2011, 31(12) |
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| Authors: | Yang Xiaoxia Tan Dunqiang Chen Wei Xiao Dongfei |
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| Affiliation: | Yang Xiaoxia1,Tan Dunqiang1,Chen Wei2,Xiao Dongfei1(1.school of Materials Science and Engineering,Nanchang University,2.Ningbo Branch of China Academy of Ordnance Science) |
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| Abstract: | In order to understand the quick heat dissipation of ignition-proof behavior in the spray forming magnesium alloy with nitrogen as atomizing gas,the heat transfer between magnesium alloy droplet and gas during spray forming process were simulated by mathematical model.The results show that the atomizing gas velocity is decreased monotonically with the increases of spray distance.Droplet velocity increased firstly,and then decreased when it is equal to the gas velocity.Meanwhile,the maximum velocity is decre... |
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| Keywords: | Spray Forming Magnesium Alloy Simulation Heat Transfer |
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