Study on the acoustic propagation from hydrogen pipeline leakage at 0 ℃
Leakage of hydrogen during the pipelines transportation can lead to severe environmental pollution and safety haz-ards.Early prevention from leaks is an effective method to avoid accidents and eliminate potential risks.To analyze the propaga-tion of passive acoustic waves under leakage conditions,a 3D model for hydrogen pipeline leakage was established using COM-SOL.The fluid-structure coupling and acoustic-structure coupling methods were employed to analyze the effects of leakage ap-erture and pipeline pressure on acoustic wave propagation.The results show that as pipeline pressure increases,the stress re-sponse at the leakage aperture undergoes significant changes,with the ratio of stress response to pipeline pressure fluctuating sharply within the range of 30％to 40％,while the pressure response changes steadily within a range of 10％.The total sound pressure shows a consistent trend in path variation across three different leakage apertures,increasing as the aperture size grows.The increase in aperture size leads to faster stress wave diffusion and more significant structural displacement changes.Addition-ally,the increase in pipeline pressure results in higher amplitude of the acoustic waves,while a higher frequency causes the a-coustic wave energy to decay more rapidly.
Low temperaturePipelinesAcoustic spreadingStress distributionHydrogen gas
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