高压氢气泄漏射流研究进展

Research progress of high-pressure hydrogen leakage and jet flow

叙述了高压氢气泄漏射流研究进展,重点对氢气状态方程、欠膨胀射流结构及模型、射流区域氢气浓度预测、基于计算流体动力学的泄漏射流模拟等方面进行了归纳、总结和评述,并对未来研究方向进行了展望。文中总结:现有研究表明已有多种适用于高压氢气的实际状态方程,Peng-Robinson、Abel-Noble等方程兼具便捷性及精度;高压氢气泄漏时在泄漏口呈现高度欠膨胀射流结构,Molkov模型可用于预测欠膨胀射流特性参数;高压氢气泄漏射流区为动量控制或动量与浮力联合控制,区域内氢气浓度与泄漏口径、泄漏口距离、介质密度组成的量纲为1参数有量化关系;主流计算流体动力学软件如ANSYS-Fluent、FLACS等在模拟高压氢气泄漏时均被证实具有较好精度。未来研究方向包括大尺度实验、不规则泄漏口、成果工程化应用以及高效数值模拟方法等。

The research progress of high-pressure hydrogen leakage and jet flow was described.The aspects of real state of equation of hydrogen,the structure and model of high pressure under-expanded jet,the hydrogen concentration distribution of jet flow region,and the numerical simulation based on the computational fluid dynamics are concluded,summarized,and reviewed.The research direction in the future is raised.The existing research shows that there are several real gas state equations for high pressure hydrogen.The state equations of Peng-Robinson,Abel-Noble etc.are convenient and accurate.Highly under-expanded jet flow is formed during high pressure hydrogen releases,and Molkov model can be used to predict the characteristics of under-expanded jet flow.The jet flow region is controlled by momentum or the combination of momentum and buoyancy.The concentration of hydrogen in jet flow region is quantitatively related by the dimensionless parameter formed by release diameter,distance from release orifice,and medium densities.The common computational fluid dynamic software such as ANSYS-Fluent,FLACS etc.used in high pressure hydrogen release have been verified to have good precision.The future directions include large scale experiments,irregular release orifices,engineering applications of research results,and high efficient numerical methods.