高压氢燃料气瓶注气阶段惰化特性分析

庹中兰; 薛大文; 夏海山; 潘昀; 王薛人

doi:10.19912/j.0254-0096.tynxb.2024-0465

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太阳能学报 ›› 2025, Vol. 46 ›› Issue (7) : 550-558. DOI: 10.19912/j.0254-0096.tynxb.2024-0465

第二十七届中国科协年会学术论文

高压氢燃料气瓶注气阶段惰化特性分析

庹中兰, 薛大文, 夏海山, 潘昀, 王薛人

作者信息 +

IERTING CHARACTERISTICS ANALYSIS DURING GAS INJECTION STAGE IN HIGH-PRESSURE HYDROGEN FUEL CYLINDERS

Tuo Zhonglan, Xue Dawen, Xia Haishan, Pan Yun, Wang Xueren

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摘要

分析注气阶段惰化流场结构与气体混合特性的耦合作用机理,采用数值模拟方法评估惰化过程中的氧气体积分数变化特征,研究发现最大氧气体积分数在注气阶段呈现出先快速下降（第1阶段）后缓慢下降（第2阶段）的变化特性。为了阐明氧气体积分数呈现2阶段变化的原因,对速度场、压力场及氧气体积分数场的耦合机制进行分析。结果表明：注气阶段进气速度减小,压力和密度的增加使氢燃料气瓶惰化效率降低,对流传质作用减弱,导致氧气体积分数先快速下降后缓慢下降,发现氧气体积分数分布不均匀有利于氧气体积分数的快速下降,最大氧气体积分数在第1阶段的下降率是第2阶段下降率的8.32~14.40倍。

Abstract

This study investigates the coupling mechanisms between the inerting flow field structure and gas mixing characteristics during the gas injection stage in high-pressure hydrogen fuel cylinders. Numerical simulations are conducted to evaluate the variations of oxygen volume fraction throughout the inerting process. Results show that the maximum oxygen volume fraction exhibits a two-stage decreasing trend, characterized by a rapid decline in the first stage and a slower reduction in the second. To elucidate the cause of this behavior, the coupling mechanisms among the velocity, pressure, and oxygen volume fraction fields are examined. The findings indicate that decreasing inlet velocity, along with increased pressure and density, reduces inerting efficiency and weakens convective mass transfer, resulting in the observed two-stage reduction. Furthermore, a non-uniform distribution of oxygen volume fraction is found to promote the rapid decrease, with the maximum value dropping at a rate 8.32 to 14.40 times faster in the first stage than in the second.

导出引用

庹中兰, 薛大文, 夏海山, 潘昀, 王薛人. 高压氢燃料气瓶注气阶段惰化特性分析[J]. 太阳能学报. 2025, 46(7): 550-558 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0465

Tuo Zhonglan, Xue Dawen, Xia Haishan, Pan Yun, Wang Xueren. IERTING CHARACTERISTICS ANALYSIS DURING GAS INJECTION STAGE IN HIGH-PRESSURE HYDROGEN FUEL CYLINDERS[J]. Acta Energiae Solaris Sinica. 2025, 46(7): 550-558 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0465

中图分类号： TK91

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