汽车工程学报2024，Vol.14Issue(4)：687-695,9.DOI:10.3969/j.issn.2095‒1469.2024.04.12
受限空间下车载供氢系统氢气泄漏扩散分析
Analysis of Hydrogen Leakage and Diffusion in Onboard Hydrogen Supply Systems Within Confined Spaces
摘要
Abstract
To address the potential safety risks caused by hydrogen leakage from the onboard hydrogen system in confined spaces,a hydrogen leakage diffusion simulation study was carried out on a hydrogen fuel cell semi-trailer tractor in a confined space using fluent software.The results show that,using the backward hydrogen leakage data as a baseline,the hydrogen concentration near the vent increases by an average of 42.38%after upward leakage and by 99.89%after forward leakage.Taking the hydrogen concentration data at a leak rate of 10 g/s as a benchmark,the hydrogen concentration near the vent increases by an average of 4.68%at a leak rate of 20 g/s and 127.73%at a leak rate of 90 g/s.Under certain conditions,increasing the vent area can reduce the hydrogen concentration in the confined space,but it is far less effective than using forced ventilation near the vent.After a prolonged period of hydrogen leakage,the hydrogen distribution throughout the confined space gradually reaches equilibrium.Therefore,hydrogen leakage should be promptly and effectively restricted.关键词
氢气/泄漏/数值方法/卡车/受限空间Key words
hydrogen/leakage/numerical methods/trucks/confined space分类
能源科技引用本文复制引用
张永涛,高海宇,张欣,严浩华..受限空间下车载供氢系统氢气泄漏扩散分析[J].汽车工程学报,2024,14(4):687-695,9.基金项目
国家重点研发计划项目(2021YFB2501503) （2021YFB2501503）
