液氢管道泄漏扩散灾害模拟分析

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中图分类号：X931 文献标志码：A 文章编号：2095-2945（2026）11-0006-07

Abstract： The computational fluid dynamics model of liquid hydrogen leakage and dispersion was established in ANSYS Fluent platform， using the large-scale liquid hydrogen leakage experiments as the numerical object. The detailed numerical processes， including numerical scenario， geometry models， mesh grid generation， basic control equations and turbulence and phase transition models， material properties， initial and boundary conditions， and solution methods. The experimental results were used to both qualitatively and quantitatively validate the reliability of numerical model. Based on the numerical results， the characteristics of liquid hydrogen leakage and dispersion were discussed. The status of liquid pool， the changes of mass transfer rate during phase transition， the hydrogen dispersion and the explosive risk region were analyzed. The results indicate that， the liquid pool presents a dynamic equilibrium state soon after liquid hydrogen leakage. The size of liquid pool is relatively stable. The mass transfer rate of liquid hydrogen phase change is in the range of 0.02～0.03 kg/（m3·s）. The maximum sizes at down wind direction and height direction of combustible hydrogen cloud are about 70 m and 40 m respectively， both occurring at the end of liquid hydrogen leakage. The range of combustible area can cover the low temperature area. The results can provide references for liquid hydrogen risk evaluation and safety use.

Keywords： liquid hydrogen; leakage; dispersion; computational fluid dynamics; numerical simulation

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