航空科学技术2025，Vol.36Issue(2)：61-72,12.DOI:10.19452/j.issn1007-5453.2025.02.005
氢内燃机飞机氢气罐储存舱的氢气泄漏扩散分析和优化设计
Analysis and Optimization Design of Hydrogen Leakage and Diffusion in Hydrogen Tank Storage Cabin of Hydrogen Internal Combustion Engine Aircraft
摘要
Abstract
The leakage of hydrogen gas in enclosed spaces of hydrogen internal combustion engine aircraft may lead to dangerous accidents such as fires and explosions.Therefore,the study of the diffusion law and ventilation strategy of hydrogen gas leakage is crucial to prevent hydrogen explosion accidents from occurring.By exploring the diffusion law of hydrogen leakage,suitable ventilation methods can be designed to control the molar volume fraction of hydrogen in the storage compartment of the hydrogen tank within a safe range.Taking a four-seat hydrogen-fueled internal combustion engine(ICE)aircraft as the research object,the molar volume fraction and diffusion rate of hydrogen gas in the hydrogen tank storage compartment(cabin)were studied using computational fluid dynamics(CFD)simulation,and the law of hydrogen leakage and diffusion in the cabin of hydrogen-fueled internal combustion engine aircraft was analyzed.The simulation results show that hydrogen is most likely to accumulate in the front part of the upper surface of the engine room and the front part of the side of the engine room,and the diffusion rate is faster.Under the condition that the aerodynamic shape is not affected,the hydrogen emission simulation analysis is carried out by adding vents at different positions on the upper surface and side of the engine room,and the optimal vent layout is obtained.At the same time,it is found that only adding vents has no obvious effect on hydrogen emission.In the case of retaining the vent,a forced air intake was added to the bottom of the engine room to scavenging the interior of the engine room.The simulation results show that the effect is remarkable,and the molar volume fraction of hydrogen inside the engine room was effectively controlled below 4%(except the area near the leakage port),which was in the safe range.The research results can provide reference for the ventilation design of hydrogen tank storage compartment of hydrogen fuel aircraft,and effectively prevent the potential risk caused by hydrogen leakage.关键词
氢气泄漏/氢内燃机/氢气摩尔体积分数/供氢系统/数值模拟Key words
hydrogen leakage/hydrogen internal combustion engine/hydrogen molar volume fraction/hydrogen supply system/numerical simulation分类
航空航天引用本文复制引用
康桂文,王闯闯,项松,黄榕,杨凤田..氢内燃机飞机氢气罐储存舱的氢气泄漏扩散分析和优化设计[J].航空科学技术,2025,36(2):61-72,12.基金项目
辽宁省自然科学基金(2013024006) Liaoning Provincial Natural Science Foundation(2013024006) （2013024006）
