Objective The aim is to study the corrosion burst problem that may occur during the transportation of overhead large-scale pure hydrogen/hydrogen-doped natural gas pipelines to prevent safety accidents caused by leakage and combustion due to this issue.Methods Based on the theory of gas combustion dynamics and computational fluid dynamics(CFD),a three-dimensional pipeline small hole leakage model under different conditions was established,and CFD Fluent software was used to simulate the combustion characteristic of pure hydrogen/hydrogen-doped natural gas jet diffusion flame under different conditions.Results The relative error between the height of simulated jet flame and the experimental jet flame is 1.48%;as the delivery pressure and leakage aperture increase,the height of the jet flame increases significantly,and the peak position of the flame temperature is further away,making it more harmful;as the hydrogen doping ratio increases from 10%to 90%,the jet flame height decreases by 13.7%.Conclusion The research results are consistent with the experiment,which can provide data support and practical reference for optimizing the design parameters of pure hydrogen/hydrogen-doped natural gas pipeline network transmission and fire safety accident disposal.
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