Experimental Research on Single-Cycle Detonation in Tubes with an Inner Diameter of 6 Millimeters

Journal of Propulsion Technology ›› 2014, Vol. 35 ›› Issue (12): 1722-1728.

School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China,School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China and School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China

Published:2021-08-15

六毫米内径管道中的单次爆震实验研究 *

何建男,范　玮,肖　强,马鹏飞,鲁　唯,何清源

西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072

作者简介:何建男(1987—)，男，博士生，研究领域为微爆震燃烧及推进技术。
基金资助:
国家自然科学基金(51176158)；教育部博士点基金(20126102110029)。

Abstract

Abstract: To investigate the characteristics of micro-detonation waves，experiments were carried out in tubes with an inner diameter of 6mm using ethylene and oxygen as fuel and oxidizer. It shows that the gaseous mixture could successfully develop steady detonation wave. The detonation strength and flame propagation mode were greatly affected by the equivalence ratio. The distance of deflagration-to-detonation transition (DDT) was obtained at different equivalence ratios. The shortest distance occurs at equivalence ratio 1.4，and detonation becomes unsteady when equivalence ratio is greater than 2.2. The process of flame propagation was captured by high speed camera at the equivalence ratio of 0.8，1.4 and 2.2，respectively. Several kinds of flame shape were observed and the factors that influence the flame shape formation were analyzed. Detonation velocity and pressure were measured at three equivalence ratios. Results show that detonation pressure and velocity reach the maximum value at the equivalence ratio of 2.2 and the minimum value at 0.8，which is in good agreement with C-J detonation.

Key words: Micro-detonation；Deflagration-to-detonation transition；Equivalence ratio；Flame propagation；Detonation pressure；Detonation velocity

摘要： 为研究微尺度下的爆震波传播特性，用乙烯和氧气为燃料和氧化剂，在6mm内径的管道内进行了爆震实验研究。实验表明，气体混合物在该尺度下可以产生稳定的爆震波，且爆震强度和火焰传播模式等受当量比影响较大。实验在不同当量比下得到了缓燃转爆震的距离，其中当量比1.4时距离最短，当量比大于2.2时爆震不稳定。用高速摄像机拍摄了当量比0.8，1.4和2.2下的火焰传播过程，发现了多种火焰形态并分析了形成原因；测量了三种当量比下的爆震速度和压力，发现当量比2.2时的爆震压力和速度最大，0.8时最小。实验值与C-J爆震理论值吻合较好。

关键词: 微爆震；缓燃转爆震；当量比；火焰传播；爆震压力；爆震速度

HE Jian-nan,FAN Wei,XIAO Qiang,MA Peng-fei,LU Wei,HE Qing-yuan. Experimental Research on Single-Cycle Detonation in Tubes with an Inner Diameter of 6 Millimeters[J]. Journal of Propulsion Technology, 2014, 35(12): 1722-1728.

何建男,范　玮,肖　强,马鹏飞,鲁　唯,何清源. 六毫米内径管道中的单次爆震实验研究 *[J]. 推进技术, 2014, 35(12): 1722-1728.

References

[1] Fernandez-Pello A. Micropower Generation Using Combustion: Issues and Approaches[J]. Proceedings of the Combustion Institute, 2002, 29(1): 883-899.
[2] Ju Yiguang, Maruta K. Microscale Combustion: Technology Development and Fundamental Research[J]. Progress in Energy and Combustion Science, 2011, 37(6): 669-715.
[3] Chigier N, Gemci T. A Review of Micro Propulsion Technology[C]. Reno Nevada: 41st Aerospace Sciences Meeting and Exhibit, 2003.
[4] 严传俊, 范玮. 脉冲爆震发动机原理及关键技术 [M]. 西安: 西北工业大学出版社, 2005.
[5] 张超, 唐豪, 李明, 等. 当量比和间隙尺寸对爆震波传播过程的影响[J]. 航空动力学报, 2012, 27(9): 1948-1957.
[6] Austin J M, Bodony D J. Wave Propagation in Gaseous Small-Scale Channel Flows[J]. Shock Waves, 2011, 21(6): 547-557.
[7] Manzhalei V I. Low-Velocity Detonation Limits of Gaseous Mixtures[J]. Combustion, Explosion, and Shock Waves, 1999, 35(3): 298-302.
[8] Wu Ming-hsun, Burke M P, Son S F, et al. Flame Acceleration and the Transition to Detonation of Stoichiometric Ethylene/Oxygen in Microscale Tubes[J]. Proceedings of the Combustion Institute, 2007, 31(2): 2429-2436.
[9] Wu Ming-hsun, Wang Chan-Yu. Reaction Propagation Modes in Millimeter-Scale Tubes for Ethylene/Oxygen Mixtures[J]. Proceedings of the Combustion Institute, 2011, 33(2): 2287-2293.
[10] Ivanov M F, Kiverin A D, Liberman M A. Flame Acceleration and DDT of Hydrogen-Oxygen Gaseous Mixtures in Channels with No-Slip Walls[J]. International Journal of Hydrogen Energy, 2011, 36(13): 7714-7727.
[11] Bychkov V, Akkerman V, Fru G, et al. Flame Acceleration in the Early Stages of Burning in Tubes[J]. Combustion and Flame, 2007, 150(4): 263-276.
[12] Ott J D, Oran E S, Anderson J D. A Mechanism for Flame Acceleration in Narrow Tubes[J]. AIAA Journal, 2003, 41(7): 1391-1396.
[13] Liberman M A, Ivanov M F, Kiverin A D, et al. Deflagration-to-Detonation Transition in Highly Reactive Combustible Mixtures[J]. Acta Astronautica, 2010, 67(7-8): 688-701.
[14] Liberman M A, Kuznetsov M, Ivanov M F, et al. Formation of the Preheated Zone of a Propagating Flame and the Mechanism Underlying the Deflagration-to-Detonation Transition[J]. Physics Letters A, 2009, 373(5): 501-510.
[15] Gordon S, McBride B J. Computer Program for Calculation of Complex Chemical Equilibrium Compositions and Applications[R]. NASA RP 1331-1994.
[16] Clanet C, Searby G. On the “Tulip Flame” Phenomenon[J]. Combustion and Flame, 1996, 105(1-2): 225-238.
[17] Xiao Huahua, Wang Qingsong, He Xuechao, et al. Experimental and Numerical Study on Premixed Hydrogen /Air Flame Propagation in a Horizontal Rectangular Closed Duct[J]. International Journal of Hydrogen Energy, 2010, 35(3): 1367-1376.(编辑:张荣莉)　　　　　　　　　　　　　*　收稿日期:2013-11-07；修订日期:2014-01-02。基金项目:国家自然科学基金(51176158)；教育部博士点基金(20126102110029)。作者简介:何建男(1987—),男,博士生,研究领域为微爆震燃烧及推进技术。E-mail:dragon5112@126.com