低温贮箱中相变过程高效率瞬态数值模拟方法
Efficient Transient Numerical Method for the Phase Change Process in Cryogenic Tanks
左忠琪 1邹震峰 1蒋文兵 1黄永华1
作者信息
- 1. 上海交通大学制冷与低温工程研究所,上海 200240
- 折叠
摘要
闭口低温贮箱在超低热流密度作用下的自增压瞬态过程模拟通常需要耗费巨量的计算资源.使用常规硬件和现有通用CFD商业软件求解此类长周期瞬态模拟往往耗时过长.本文基于OpenFOAM开源计算流体力学平台,提出了针对贮箱内气液相变引起的自增压瞬态过程的快速计算模型,获得了相较于以往常用商业求解器Fluent十倍以上的计算效率提升.同时,得到了模型系数在液氮贮箱自增压过程的取值规律.结果表明,本模型精度较以往热力学平衡模型显著提升.
Abstract
Simulating the self-pressurization process in closed cryogenic tanks usually consumes tremendous computational resource.It is too long to simulate the long-term transient physics hap-pened in the tanks with normal commercial computational fluid dynamics software.This study proposes an efficient solver to simulate the self-pressurization process induced by the liquid-vapor phase change in the cryogenic tanks based on the open source platform OpenFOAM.Ten times improvement in the calculation speed is achieved compared to the widely-used commercial solver Fluent®.The values of the models coefficients are also discussed to reduce the simulation's error.The comparison between the results from the present results and early thermodynamic node models indicates that the accuracy of the present model is significantly improved.
关键词
低温贮箱/自增压/蒸发冷凝/数值模型/快速模拟Key words
cryogenic tanks/self-pressurization/evaporation and condensation/numerical model/efficient simulation引用本文复制引用
基金项目
国家自然基金(51676118)
国家自然基金(51936006)
出版年
2024
NETL
NSTL
维普
万方数据