Abstract:
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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