掺氢天然气高压管道小孔泄漏及扩散特性

Small Hole Leakage and Diffusion Characteristics of Hydrogen⁃Blended Natural Gas High⁃Pressure Pipeline

支树洁 徐海峰 刘罗茜 薛仕龙 彭士垚 张小斌

Shujie ZHI Haifeng XU Luoqian LIU Shilong XUE Shiyao PENG Xiaobin ZHANG

中国管网集团公司研究总院，河北 廊坊 065099 浙江大学 低温与制冷研究所，浙江 杭州 310027

General Research Institute of China Pipeline Network Group，Langfang Hebei 065099，China Institute of Refrigeration and Cryogenics，Zhejiang University，Hangzhou Zhejiang 310027，China

通过现有的天然气管道运输掺氢天然气，可大幅降低氢气运输成本。为了评估掺氢天然气管道泄漏的风险，综合高压管道小孔泄漏模型和高斯羽流模型，考虑射流初始动量导致的抬升高度，将高斯羽流模型计算结果与已有实验数据进行对比，并分析了掺氢天然气管道发生单个小孔竖直向上喷射泄漏后，掺氢比、管道压力、风速和泄漏孔直径对泄漏气体导致的爆炸危险区域范围的影响规律。结果表明，高斯羽流模型计算结果与实验数据比较吻合；甲烷危险区域最大距离与掺氢比近似呈线性负相关，氢气危险区域最大距离与掺氢比近似呈线性正相关；甲烷和氢气危险区域最大距离与管道压力近似呈线性正相关，与风速近似呈抛物线型负相关，与泄漏孔直径近似呈正相关。

Transporting hydrogen?blended natural gas (HBNG) through existing natural gas pipelines can significantly reduce the cost of hydrogen transportation. To evaluate the risk of HBNG pipeline leakage, a high?pressure pipeline small?hole leakage model and a Gaussian plume model are combined, taking into account the lifting height caused by the initial momentum of the jet. The calculation results of the Gaussian plume model are compared with the existing experimental data. Then, the influence of the hydrogen mixing ratio, pipeline pressure, wind speed, and leakage hole diameter on the explosion risk area caused by the leakage of the natural gas pipeline is analyzed. The research results indicate that the calculation results of the Gaussian plume model are in good agreement with the experimental data. The hydrogen mixing ratio is approximately linearly negatively correlated with the maximum distance from the methane hazardous area, and linearly positively correlated with the maximum distance from the hydrogen hazardous area. The maximum distance between methane and hydrogen hazardous areas is approximately linearly positively correlated with pipeline pressure, negatively correlated with wind speed, and approximately proportional to the diameter of the leakage hole.

国家重点研发计划项目(2022YFB4002900)

10.12422/j.issn.1006-396X.2024.04.004