| 摘要: |
| 目的 研究架空大规模纯氢/掺氢天然气管道在输运过程中可能发生的腐蚀穿孔问题，以解决因其所导致的泄漏燃烧安全事故。方法 基于气体燃烧动力学和计算流体力学（CFD）理论，建立了不同条件下的三维管道小孔泄漏模型，并使用CFD Fluent软件模拟了不同条件下的纯氢/掺氢天然气射流扩散火焰的燃烧特性。结果 模拟射流火焰与实验射流火焰高度相对误差仅为1.48%；随着输送压力与泄漏孔径的增大，射流火焰的高度显著增大，火焰温度峰值位置更远，危害性更强；随着掺氢比的增大，火焰峰值温度明显上升，射流火焰高度逐渐变小，当掺氢比从10%增至90%时，射流火焰高度下降了13.7%。结论 研究结果与实验结果基本吻合，可为纯氢/掺氢天然气管网输送设计参数的优化和火灾安全事故的处置提供数据支持与有效参考。 |
| 关键词: 氢气 掺氢 泄漏 燃烧 数值模拟 |
| DOI：10.3969/j.issn.1007-3426.2024.06.021 |
| 分类号: |
| 基金项目:中国电力工程顾问集团有限公司重大科技专项“光伏水电解制氢技术研究与应用示范” （DG3-A03-2022） |
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| Numerical simulation of jet combustion with small hole leakage in pure hydrogen/hydrogen-doped pipelines |
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XU Zhiliang1, WANG Lu1, JIN Hao2, HU Wangxing2, CHEN Xiaowei1, QI Qi1
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1.East China Electric Power Design Institute Co., Ltd. of China Power Engineering Consulting Group, Shanghai, China;2.School of Chemical Engineering, East China University of Science and Technology, Shanghai, China
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| 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. |
| Key words: hydrogen hydrogen doping leakage combustion numerical simulation |
