熔池温度对浸没反应射流结构的影响  

Influence of Molten Pool Temperature on the Jet Structure of Submerged Reaction

作　　者：严侃 孔亮 YAN Can;KONG Liang(Military Representative Office of the Naval Equipment Department in Linfen,Linfen 041000,China;The 705 Re-search Institute,China State Shipbuilding Corporation Limited,Xi’an 710077,China)

机构地区：[1]海军装备部驻临汾地区军事代表室,山西临汾041000 [2]中国船舶集团有限公司第705研究所,陕西西安710077

出　　处：《水下无人系统学报》2021年第3期320-325,共6页Journal of Unmanned Undersea Systems

摘　　要：以气-液浸没反应射流为能量来源的闭式循环动力系统在水下推进以及航空航天等领域具有广阔的应用前景。文中在Lee相变模型和涡耗散反应速率模型的基础上,采用数值仿真方法研究了金属Li熔池温度对浸没反应射流结构的影响。研究结果表明,文中数值仿真计算结果与实验符合较好,所采用的数值仿真方法可以较好地预测浸没反应射流过程;气态氧化物气羽核心区基本不受熔池温度的影响,而在高熔池温度下,会有更多液态金属被蒸发,并且随着冷凝驱动势的减小,金属蒸汽的凝结速率也相应降低,因而金属的蒸发速率和凝结速率共同决定金属蒸汽气羽的宏观尺寸。研究结果可为气-液射流反应器的设计和安全运行提供理论指导。The closed-cycle power system,which treats the submerged gas-liquid reaction jet as an energy source,has broad application prospects in underwater propulsion and aerospace.In this study,a numerical simulation of the influence of molten lithium molten pool temperature on the submerged reaction jet structure is conducted based on Lee’s phase change model and eddy dissipation reaction rate model.The results show that the simulation results agree well with the experimental results,and the numerical model used in this study can predict the submerged reaction jet process well.The core region of the steam plume of gaseous oxide is not affected by the molten pool temperature,whereas at a high molten pool temperature,as more liquid metal would be evaporated,and with the reduction of condensation driving potential,the condensation rate of the metal vapor would also decrease accordingly,which indicates that the evaporation rate and condensation rate jointly determine the macroscopic size of the steam plume of the metal vapor.The research results can guide the design and safe operation of gas-liquid jet reactors.

关 键 词：闭式循环动力系统 浸没射流 熔池温度 

分 类 号：TJ630.32[兵器科学与技术—武器系统与运用工程] TK123[动力工程及工程热物理—工程热物理]