熔融铝水蒸气浸没射流反应数值仿真

徐 升; 伊 寅; 史小锋; 宗 潇; 韩新波

doi:10.11993/j.issn.2096-3920.2020.02.011

熔融铝水蒸气浸没射流反应数值仿真

doi: 10.11993/j.issn.2096-3920.2020.02.011

中国船舶重工集团公司第705研究所, 陕西西安, 710077

基金项目: 国家自然科学基金项目(61403306); 中国博士后科学基金资助项目(2018M633600)

详细信息

作者简介:
徐升(1993-), 男, 在读硕士, 主要研究方向为能源动力推进技术.

中图分类号: TJ630.32; TK121
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- 文章访问数: 281
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- 被引次数: 0
出版历程
- 收稿日期: 2018-12-06
- 修回日期: 2019-01-04
- 刊出日期: 2020-04-30

Numerical Simulation on Submerged Jet Reaction of Molten Aluminum and Water Vapor

The 705 Research Institute, China Shipbuilding Industry Corporation, Xi’an 710077, China

摘要

摘要: 熔融铝水蒸气浸没射流反应可作为氢氧闭式循环动力系统的新型制氢方法, 能够提高制氢速率和氢气发生器的稳定可控性, 但反应具有高温、不透明和局部流动状态复杂等特点, 难以通过常规方法对其流场进行观测。为探究其流场特性, 文中使用Fluent非预混燃烧模型对该反应进行了数值仿真。通过理想混合物密度计算方法对概率密度函数查询表的精度进行了提升, 使数值模型能更准确地模拟气液反应, 得到了熔融铝水蒸气浸没射流反应流场的参数分布以及不同水蒸气入口速度条件下流场温度分布和水蒸气核心区的变化规律。研究结果表明, 文中数值模型能够较合理地模拟射流燃烧反应; 熔融铝水蒸气反应射流流场由水蒸气核心区和混合产物区组成, 其中水蒸气核心区在射流区域中占据的空间远小于混合产物区; 当水蒸气入口速度增加时, 高温区最高温度增高且体积增大、水蒸气核心区长度增长。研究结果将为进一步研究熔融铝水蒸气浸没射流反应和设计氢气发生器提供参考。
- 氢氧闭式循环动力系统 /
- 熔融铝 /
- 浸没射流 /
- 非预混燃烧 /
- 核心区
Abstract: The submerged jet reaction of molten aluminum and water vapor can be used as a new method of hydrogen generation in hydrogen-oxygen closed cycle power system, and can improve the rate of hydrogen generation and the stability and controllability of hydrogen generator. However, this reaction has the characteristics of high temperature, opacity and complex local flow state, so it is difficult to observe the flow field through conventional methods. In order to explore the flow field characteristics of the reaction, this paper uses the non-premixed combustion model in the software Fluent to conduct a numerical simulation on this reaction. The accuracy of probability density function(PDF) query table is improved by the ideal mixture density calculation method, so that the numerical model can simulate the gas-liquid reaction more accurately, and can obtain the parameter distribution of the reaction jet flow field of molten aluminum and water vapor, the variation law of the temperature distribution of flow field and the water vapor core region under different inlet velocities of water vapor. The results show that the numerical model used in this paper can simulate jet combustion reaction reasonably; The flow field of molten aluminum-water vapor reaction jet is composed of water vapor core region and mixed product region, where the water vapor core region occupies much less space in the jet region than the mixed product region; When the inlet velocity of water vapor increases, the highest temperature and volume of the high temperature region rise, and the length of the water vapor core region increases. This research may provide a reference for further study on submerged jet reaction of molten aluminum and water vapor and the design of hydrogen generator.
- hydrogen-oxygen closed cycle power system /
- molten aluminum /
- submerged jet /
- non-premixed combustion /
- core region

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