低温液氧储罐预冷过程数值模拟  

Numerical study on precooling process of cryogenic liquid oxygen tank

作　　者：周霞 刘丽[1,2] 厉劲风 邱利民[1,2] 张小斌 吴斌[3] 朱超 马宏祥[3] Zhou Xia;Liu Li;Li Jinfeng;QiuLimin;Zhang Xiaobin;WU Bin;Zhu Chao;Ma Hongxlang(Institute of Refrigeration and Cryogenics, Zhejiang University,Hangzhou 310027, China;Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Hangzhou 310027, China;China Aerodynamics Research and Development Center, Mianyang 621000, China)

机构地区：[1]浙江大学制冷与低温研究所,杭州310027 [2]浙江省制冷与低温技术重点实验室,杭州310027 [3]中国空气动力研究与发展中心,绵阳621000

出　　处：《低温工程》2018年第3期35-40,共6页Cryogenics

基　　金：国家自然科学基金重点项目(51636007);国家重点研发计划项目(SQ2017YFGX050091)

摘　　要：为了避免低温储罐受到强烈热冲击,在投入运行之前,必须对其进行预冷。采用计算流体力学(CFD)的方法,对低温液氧储罐的预冷过程进行了数值模拟分析。建立了带保温层厚度与不锈钢罐壁厚度的低温液氧储罐计算模型,通过相变模型修正及时间步长验证,考虑固液耦合传热,获得预冷过程中储罐内气体温度、压力变化及气液分布情况,获得储罐降温规律,并探究不同进口流量对预冷过程的影响,以便对预冷过程进行参数优化。In order to minimize thermal shock caused by temperature difference,liquid oxygen tank have to be precooled gradually before loading cryogenic liquids. Computational fluid dynamics（ CFD） method was adopted to analyze the process of precooling. A calculation model with thickness of stainless steel and insulation layer was set up. Temperature field and gas-liquid distribution were obtained by considering latent heat of vaporization and solid-liquid coupled heat transformation,and the effects of different inlet flow rates were investigated. The results may be helpful to optimize the parameters of the precooling process.

关 键 词：液氧储罐 预冷过程 数值模拟 温度场 

分 类 号：TB657[一般工业技术—制冷工程]