同济大学学报（自然科学版）2024，Vol.52Issue(z1)：261-274,14.DOI:10.11908/j.issn.0253-374x.24785
氢燃料电池汽车在风洞试验中的氢泄漏扩散分析
Analysis of Hydrogen Leakage and Diffusion in Vehicle Wind Tunnel Based on CFD
马天才 1景秀辉 1李田田 2黄倍铭 3谢娇娇 3庞加斌2
作者信息
- 1. 同济大学 汽车学院,上海 201804||同济大学 碳中和研究院,上海 200092
- 2. 同济大学 汽车学院,上海 201804||同济大学 上海地面交通工具风洞中心,上海 201804
- 3. 同济大学 汽车学院,上海 201804
- 折叠
摘要
Abstract
With the rapid development of hydrogen fuel cell vehicles(HFCVs),it is possible for hydrogen fuel cell vehicles to be tested in wind tunnels.In this paper,the flow diffusion law and distribution of hydrogen in wind tunnel under the condition of HFCV leak were studied by numerical simulation.When the wind tunnel simulates the driving condition of the HFCV at 80 km/h,the leaking hydrogen moves against the surface of the car and into the wake area.The hydrogen concentration decreases with increasing distance from the car.The hydrogen entering the flow channel from the collecting port is concentrated in the middle and bottom,with an obvious concentration gradient,and becomes uniform after passing through the fan section.After 10s,the hydrogen leaking from the bottom of the car returned to the test section and merged with the hydrogen leaking from the car,resulting in a continuous increase in the concentration of hydrogen in the entire area.The concentration of hydrogen inboard path increases faster than outboard path due to the deflectors at the corner of the channel.When the wind tunnel simulates the idling condition,the leaking hydrogen mostly diffuses in the test section and almost no hydrogen is detected in the flow channel.Affected by airflow disturbance in the test section,the hydrogen on two sides of the vehicle presents an unsymmetrical distribution,the hydrogen at the top is concentrated on the left side of the HFCV.Finally,according to the numerical simulation results,the installation position of the hydrogen sensors is suggested.关键词
汽车风洞/氢燃料电池汽车(HFCVs)/氢泄漏/数值模拟Key words
wind tunnel/hydrogen fuel cell vehicles(HFCVs)/hydrogen leakage/numerical simulation分类
能源科技引用本文复制引用
马天才,景秀辉,李田田,黄倍铭,谢娇娇,庞加斌..氢燃料电池汽车在风洞试验中的氢泄漏扩散分析[J].同济大学学报（自然科学版）,2024,52(z1):261-274,14.
