Numerical and experimental study on leakage and diffusion behavior of liquid hydrogen
For the scenario of continuous liquid hydrogen leakage and diffusion,based on the SLAB model,a theoretical model of liquid hydrogen leakage and diffusion is established,a 3 m3 liquid hydrogen leakage and diffusion experiment is carried out,and the experimental study con-cludes that when liquid hydrogen is continuously leaking,three phases of liquid hydrogen ground development,hydrogen-air cloud lifting and stabilized plume will be formed.The steady plume status is reached at 36 s in this experiment,and the lifting starts at 5 m along the downwind direc-tion.The thickness of the cloud reaches 10.9 m.The numerical calculation results show that the cloud thickness approaches the experimental results at 15 m downwind,and the reasons for the deviation of the numerical calculation results are analyzed,and the comparison shows that the model is able to calculate the diffusion behavior of the continuous liquid hydrogen leakage,the range of the hazardous boundary and the distribution of the concentration,and has a certain de-gree of feasibility in the rapid prediction of the diffusion behavior of the liquid hydrogen leakage.It has certain feasibility in the rapid prediction of liquid hydrogen leakage and diffusion behavior.
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