制冷学报2025，Vol.46Issue(5)：24-31,8.DOI:10.12465/j.issn.0253-4339.2025.05.024
液氢管流静电积聚规律的实验研究
Experimental Study on Electrostatic Accumulation Mechanism in Liquid Hydrogen Pipe Flow
孙文豪 1王磊 1马原 1刘柏文 1厉彦忠1
作者信息
- 1. 西安交通大学制冷与低温工程系 西安 710049
- 折叠
摘要
Abstract
To investigate electrostatic accumulation induced by cryogenic liquid hydrogen(LH2)flow in pipelines,a test system was constructed with LH2 as the primary working medium.Using vacuum insulation,insulated connections,electrostatic shielding,and other measures,as well as the application of the leakage charge method,safe and accurate measurement of extremely low-level charge quantities generated by LH2 flow under cryogenic conditions was achieved.The charge accumulation characteristics under multiple flow conditions with Reynolds numbers(Re)below 2 × 105 were analyzed.The experimental results indicated that notable flow charging phenomena occurred during LH2 flow with extremely low electrical conductivity in pipelines.Furthermore,charge accumulation demonstrated a linear growth during the test period.Within the range of pipe lengths and Reynolds numbers covered by the experiment,the average charge density decreased with an increase in the flow velocity;however,the rate of decrease gradually diminished.The average charge density of flow decreased with increasing pipe diameter.The developed electrostatic accumulation test system for low-temperature LH2 pipe flow provided an important platform support for conducting LH2 electrostatic tests.This study validated the feasibility of the electrostatic measurement method for LH2,providing design guidance for exploring the electrostatic laws of LH2 and the boundary of safe flow velocity.关键词
流动荷电/静电积聚/低温流体/氢安全Key words
flow charging/electrostatic charge accumulation/cryogenic fluids/hydrogen safety分类
能源科技引用本文复制引用
孙文豪,王磊,马原,刘柏文,厉彦忠..液氢管流静电积聚规律的实验研究[J].制冷学报,2025,46(5):24-31,8.
