氢-氨混合物爆炸特性研究：点火位置的影响

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-06-07 DOI:10.1016/j.ijhydene.2025.05.366

Hai Li , Yang Li , Binglin Zheng , Jie Ding , Wentao Li , Changjian Wang

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引用次数: 0

摘要

在0.125 m3立方容器中进行了一系列实验，研究了点火位置对氢-氨混合物的影响。顶部点火时，可以观察到两个明显的Popen和Phel峰。所有浓度的Popen都在14 kPa左右，而phen随着氢-氨混合物浓度的增加而增加。对于中心点火，Pvib的出现或消失取决于反应速率。当CNH3含量在15% ~ 19%之间时，内火焰速度呈上升趋势，当CNH3含量超过19%时，内火焰速度开始下降。与顶部点火和中心点火相比，由于氨焰的浮力，底部点火达到外焰最大位移所需的时间最短。结果表明，当CNH3含量为19%时，底燃效率最高。

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Investigation into the explosion characteristics of hydrogen-ammonia mixture: Effect of ignition position

A series of experiments were conducted in a 0.125 m³ cubic vessel to investigate the effects of ignition position on hydrogen-ammonia mixture. For top ignition, two obvious peaks of P_open and P_hel can be observed. P_open is around 14 kPa for all concentrations, while P_hel increases with the Hydrogen-ammonia mixture concentration. For center ignition, the appearance or disappearance of P_vib depends on the rate of reaction. Internal flame speed shows an upward trend when the

C_{{N H}_{3}}

is between 15 % and 19 %, while the flame speed begins to decrease when the

C_{{N H}_{3}}

exceeds 19 %. Compared to the top ignition and center ignition, bottom ignition takes the shortest time to reach the maximum displacement of the external flame due to the buoyancy of the ammonia flame. It can be found that the highest combustion efficiency occur for bottom ignition with

C_{{N H}_{3}}

of 19 %.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.