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[1]刘方　杨宏伟　邓付洁.不同空气系数与掺氢比对10 mm火孔火焰稳定性的影响[J].油气储运,2024,43(07):1-13.
　LIU Fang,YANG Hongwei,DENG Fujie.Study on the influence of different air coefficients and hydrogen doping ratios on the flame stability of 10 mm fire hole[J].Oil & Gas Storage and Transportation,2024,43(07):1-13.

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不同空气系数与掺氢比对10 mm火孔火焰稳定性的影响

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年07期页码: 1-13 栏目: 出版日期: 2024-07-25

Title:: Study on the influence of different air coefficients and hydrogen doping ratios on the flame stability of 10 mm fire hole

作者:: 刘方　杨宏伟　邓付洁

Author(s):: LIU Fang; YANG Hongwei; DENG Fujie

关键词:: 圆形火孔; 掺氢比; 仿真模拟; 脱火; 回火

Keywords:: circular fire hole; hydrogen-blending ratio; analogue simulation; lift-off fire; tempering

分类号:: TE89

文献标志码:: A

摘要:: 【目的】天然气管道掺氢输送易导致终端用气设备在燃烧用火时发生脱火、回火现象，影响设备的火焰稳定性。为明确不同空气系数与掺氢比对典型终端用气设备的燃烧火焰稳定性的影响，通过仿真模拟与实验验证相结合的方法开展研究。【方法】以终端用气设备中的10 mm圆形单火孔为研究对象，通过仿真计算了一次空气系数为0.40、0.60、0.65、0.70、0.80条件下，掺氢比为0%、3%、5%、10%的脱火工况，以及一次空气系数为0.60、0.65、0.70、0.80条件下，掺氢比为0%、3%、5%、10%的回火工况；结合GB/T 16411—2008《家用燃气用具通用试验方法》，设计了天然气（纯甲烷）掺氢火焰稳定性测试方案进行实验验证。【结果】脱火工况的临界火孔气流速度模拟值与实测值平均相对误差为5.73%，验证了脱火仿真模型的可靠性；回火工况的临界火孔气流速度模拟值与实测值平均相对误差11.22%，受实验测试条件影响，误差偏大；掺氢比越大，脱火极限越高，越不容易发生脱火现象，掺氢有利于防止脱火；掺氢比越大，回火极限越高，回火倾向越大。【结论】研究成果可为掺氢天然气的工业应用提供借鉴，在实验条件受限的前提下，对于终端天然气用户进行掺氢适应性分析时，可借助仿真手段开展针对性分析，同时对于掺氢比较高的应用场景，建议开展针对性测试，确保终端用气设备的稳定运行。

Abstract:: [Purpose]Hydrogen-doped transportation of natural gas pipeline can easily lead to flame lifting and flash back of terminal gas equipment during combustion, which affects the flame stability of equipment. In order to clarify the influence of different air coefficients and hydrogen blending ratios on the flame stability of typical terminal gas equipment, a combination of simulation and experimental verification was used to study the influence of different air coefficients and hydrogen blending ratios on the flame stability of terminal gas equipment. [Method]Taking the typical 10mm circular single fire hole of terminal gas equipment as the research object, the flame lifting conditions with hydrogen doping ratios of 0%, 3%, 5%, and 10% under the conditions of primary air coefficient of 0.4, 0.6, 0.65, 0.7, and 0.8, as well as the flash back conditions with hydrogen doping ratios of 0%, 3%, 5% and 10% under the conditions of primary air coefficient of 0.6, 0.65, 0.7 and 0.8, were simulated by modeling. At the same time, in accordance with the relevant provisions of the "Universal test methods of gas burning appliances for domestic use" (GB/T 16411-2008), a test scheme for the stability of natural gas (pure methane) hydrogen-doped flame was designed for experimental verification. [Result ]The results show that the average relative error between the simulated value and the measured value of the lifting critical airflow velocity of the fire hole is 5.73%, which verifies the reliability of the simulation model. The average relative error between the calculated value and the measured value of the tempering condition is 11.22%, which is relatively large due to the influence of experimental testing conditions. The higher the hydrogen doping ratio, the higher the flame lifting limit, and the less prone to flame lifting. Hydrogen doping is beneficial for preventing flame lifting. The higher the hydrogen doping ratio, the higher the flash back limit and the greater the flash back tendency. [ Conclusion]The research results can provide reference for the industrial application of natural gas doped hydrogen supply terminal users.Under limited experimental conditions, targeted analysis can be conducted using simulation methods when analyzing the adaptability of hydrogen blending for end-users. At the same time, for application scenarios with high hydrogen blending ratio, targeted testing and analysis are recommended to ensure the stable operation of terminal gas equipment.

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[2]刘方,杨宏伟,邓付洁.不同空气系数与掺氢比对10 mm火孔火焰稳定性的影响[J].油气储运,2024,43(07):740.[doi:10.6047/j.issn.1000-8241.2024.07.003]
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更新日期/Last Update: 2024-04-18