中国空间站燃烧科学柜火焰传播速度地面测量试验

doi:10.13229/j.cnki.jdxbgxb.20221503

摘要/Abstract

摘要：

基于本生火焰法，结合数字图像处理技术，应用中国空间站燃烧科学柜开展了甲烷和乙烯火焰传播速度地面测量试验，以期为将来的天地（微重力-常重力）燃烧对比试验提供地面数据，并为燃烧科学柜在轨科学研究奠定基础。结果表明：随着当量比的升高，火焰传播速度先上升后下降，火焰高度先下降后上升，二者均在当量比为1.04左右取得最值。甲烷预混燃烧的最高火焰传播速度约为37.36 cm/s，乙烯预混燃烧的最高火焰传播速度约为67.58 cm/s，后者约为前者的1.81倍。当量比一定时，未燃混合气出口流量或出口雷诺数的改变不会引起火焰传播速度的变化，但会显著影响火焰的高度。

关键词: 动力机械及工程, 燃烧科学柜, 火焰传播速度, 本生火焰, 图像处理

Abstract:

Based on the Bunsen flame method and digital image processing technology， the ground-based experiments for measuring the flame speed of methane and ethylene were carried out using combustion science rack aboard china space station， to provide ground data for future comparison of space-ground （microgravity-normal gravity） combustion experiments， and to lay the foundation for the on-orbit combustion scientific research of Combustion Science Rack. According to the results， as the equivalence ratio increased， the flame speed increased first and then decreased， but the flame height decreased first and then increased， both of which reached their maximum or minimum value at around the equivalent ratio of 1.04. The maximum flame speed of methane premixed combustion was approximately 37.36 cm/s， while that of ethylene premixed combustion was approximately 67.58 cm/s， with the latter being about 1.81 times higher than the former. As the equivalence ratio was constant， the variation of outlet flow rates and Reynolds number of unburn air-fuel mixture gave a noticeable change in flame height but did not affect the flame speed.

Key words: power machinery and engineering, combustion science rack, flame speed, Bunsen flame, image processing

中图分类号:

V419/TK16

方钰,梅德清,郑会龙,杨肖芳,武海龙,张晓武. 中国空间站燃烧科学柜火焰传播速度地面测量试验[J]. 吉林大学学报(工学版), 2024, 54(9): 2460-2468.

Yu FANG,De-qing MEI,Hui-long ZHENG,Xiao-fang YANG,Hai-long WU,Xiao-wu ZHANG. Ground⁃based experiments of measuring flame speed for combustion science rack aboard china space station[J]. Journal of Jilin University(Engineering and Technology Edition), 2024, 54(9): 2460-2468.

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参数	数值
最大分辨率	1 296×1 024
最大帧率（全分辨率）/（f·s^-1）	3 096
曝光时间/μs	1.5~40 000
光谱范围/nm	290~1 100
感光度/ISO	160~6400

工况	当量比Φ	CH₄流量/（L·min^-1）	空气流量/ （L·min^-1）	工况	当量比Φ	C₂H₄流量/（L·min^-1）	空气流量/ （L·min^-1）
1	0.80	0.499	5.940	23	0.72	0.299	5.940
2	0.84	0.524	5.940	24	0.76	0.316	5.940
3	0.88	0.549	5.940	25	0.80	0.333	5.940
?	?	?	5.940	?	?	?	5.940
20	1.56	0.973	5.940	44	1.56	0.649	5.940
21	1.60	0.998	5.940	45	1.60	0.666	5.940
22	1.64	1.023	5.940	46	1.64	0.682	5.940

工况	当量比Φ	CH₄流量/（L·min^-1）	空气流量Q_air/（L·min^-1）	出口流量/（L·min^-1）
1	0.84	0.419	4.752	5.171
2		0.524	5.940	6.464
3		0.629	7.128	7.757
4	1.00	0.499	4.752	5.251
5		0.624	5.940	6.564
6		0.749	7.128	7.877
7	1.16	0.579	4.752	5.331
8		0.724	5.940	6.664
9		0.869	7.128	7.997
10	1.32	0.659	4.752	5.411
11		0.824	5.940	6.764
12		0.988	7.128	8.116

工况	当量比Φ	CH₄流量/（L·min^-1）	空气流量/（L·min^-1）	燃烧器喷口直径d/mm	雷诺数Re
1	1.04	0.649	5.940	10	961
2	1.04	0.649	5.940	7	1 373
3	1.12	0.699	5.940	10	965
4	1.12	0.699	5.940	7	1379
5	1.20	0.749	5.940	10	970
6	1.20	0.749	5.940	7	1 385
7	1.28	0.799	5.940	10	974
8	1.28	0.799	5.940	7	1 391