天然气与石油2023，Vol.41Issue(6)：1-7,7.DOI:10.3969/j.issn.1006-5539.2023.06.001
掺氢天然气喷射火燃烧特性实验研究
Experimental study on the combustion characteristics of hydrogen-blended natural gas jet fires
摘要
Abstract
Blending hydrogen into natural gas serves as an efficient transportation method during the early phases of energy structure transformation.However,adding hydrogen elevates the gas activity,thereby increases the fire hazard in the event of a pipeline leakage.To predict and assess the potential fire risks associated with hydrogen-blended natural gas,we undertook horizontal jet fire experiments under varied conditions,spanning pressures from 200 to 800 Pa and hydrogen blend ratios from 0 to 50%.Our findings suggest that the flame temperature rises after hydrogen blending,with a peak range of temperature of 113℃.At elevated pressures,the flame temperature distribution undergoes notable changes once the hydrogen blend ratio surpasses 10%under high pressure.The lift-off distance of flame increases with pressure increase but diminishes with a higher hydrogen blend ratio.With a hydrogen blend ratio below 10%under high pressure,its impact on flame size remains negligible.However,at a 50%blend ratio,there's a maximum flame length reduction of 13.7%.Furthermore,we introduce a dimensionless flame length prediction model tailored for hydrogen-blended natural gas.This research outcomes furnish essential data and a theoretical basis for evaluating fire risks and consequences of incidents relating to hydrogen-blended natural gas pipelines.关键词
掺氢天然气/喷射火/火焰尺寸/火焰温度/推举距离Key words
Hydrogen-blended natural gas/Jet fire/Flame size/Flame temperature/Lift-off distance引用本文复制引用
孔莹莹,胡若炜,王赛磊,韩辉,段鹏飞,韩金珂,李玉星..掺氢天然气喷射火燃烧特性实验研究[J].天然气与石油,2023,41(6):1-7,7.基金项目
国家重点研发计划"氢能技术"重点专项"中低压纯氢与掺氢燃气管道输送及其应用关键技术"(2021YFB4001603) （2021YFB4001603）
