旋流燃烧室中乙醇喷雾点火和火焰传播特性

郭晓阳; 刘博文; 胡二江; 黄佐华

doi:10.13224/j.cnki.jasp.20220657

旋流燃烧室中乙醇喷雾点火和火焰传播特性

doi: 10.13224/j.cnki.jasp.20220657

西安交通大学动力工程多相流国家重点实验室，西安 710049

基金项目: 国家自然科学基金（52176131）

详细信息

作者简介:
郭晓阳（1996-），男，博士生，主要从事纳秒脉冲等离子体点火特性研究

通讯作者:
黄佐华（1963-），男，教授，博士，主要从事燃烧基础理论和先进动力关键技术研究。E-mail：zhhuang@mail.xjtu.edu.cn

中图分类号: V231.2；TK401
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出版历程
- 收稿日期: 2022-09-05
- 网络出版日期: 2024-11-13

Ignition and flame propagation characteristics of ethanol spray in swirl combustor

State Key Laboratory of Multiphase Flow in Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China

摘要

摘要:
设计了一个可视化单头部旋流燃烧室，结合实验和数值模拟开展了乙醇喷雾的纳秒脉冲等离子体点火特性与火焰传播特性研究。通过改变不同的点火位置，同步拍摄火焰阴影图像和CH^*化学发光图像，探究火焰传播过程的时间尺度。结果表明：不同位置的点火过程均可划分为4个阶段：火焰快速发展阶段、附壁燃料消耗阶段、火焰形态转变阶段、火焰形态稳定阶段。通过分析点火延迟时间，发现燃烧室内最有利于点火的位置处于中心再循环区内部，壁面处最有利于点火的位置对应中心再循环区的最宽处。
- 旋流燃烧室 /
- 乙醇 /
- 点火位置 /
- 火焰传播 /
- 点火延迟时间
Abstract:
A well-defined visualized single-head swirl combustor was designed to study nanosecond pulsed plasma ignition and flame propagation characteristics of ethanol spray in combination with experimental investigation and numerical simulation. High-speed flame shadow and CH^* chemiluminescence images were taken simultaneously to explore the time scale of the flame propagation process at a wide range of ignition locations. The successful ignition process from different discharge positions can be eventually divided into four phases: flame propagation, combustion of wall-attached fuel, flame morphology transformation, and flame morphology stabilization. The ignition delay time was analyzed by a statistical method, revealing that the optimal ignition location in the combustor was at the inner boundary of the central recirculation zone, and the optimal ignition location near the wall must correspond to the widest part of the central recirculation zone.
- swirl combustor /
- ethanol /
- ignition position /
- flame propagation /
- ignition delay time

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图 1 旋流基础燃烧室及实验平台示意图（A～J代表不同的点火位置）

Figure 1. Schematic diagram of simplified swirl combustor and experimental platform （A～J indicate different ignition positions）

下载: 全尺寸图片幻灯片

图 2 单次纳秒脉冲放电典型的电压和电流波形图

Figure 2. Typical voltage and current waveforms from a single nanosecond pulsed discharge

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图 3 电极间隙未击穿时电压信号的导数与测量的位移电流信号之间的延时对比

Figure 3. Comparison between the derivative of the voltage signal and the measured displacement current signal without breakdown in the electrode gap

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图 4 10个放电脉冲的累积点火能量

Figure 4. Cumulative ignition energy of ten discharge pulses

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图 5 点火初始时刻中心截面流场及流线分布

Figure 5. Flow field and streamline distribution of central section at the initial time of ignition

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图 6 点火初始时刻乙醇喷雾的雾化特性

Figure 6. Atomization characteristics of ethanol spray at the initial time of ignition

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图 7 点火初始时刻中心截面局部当量比分布

Figure 7. Local equivalence ratio distribution of central section at the initial time of ignition

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图 8 不同位置点火时归一化火焰投影面积随时间的变化示例

Figure 8. Variation of the normalized flame projected area with time during ignition at different locations

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图 9 不同位置点火时归一化CH^*化学发光强度随时间的变化示例

Figure 9. Variation of normalized CH^* chemiluminescence intensity with time during ignition at different locations

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图 10 位置E第5次点火实验同步采集的归一化火焰投影面积和归一化CH^*自发光强度随时间的变化

Figure 10. Variation of normalized flame projected area and normalized CH^* chemiluminescence intensity with time,which were collected simultaneously in the5th ignition experiment at location E

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图 11 位置E第5次点火实验同步采集的高速火焰阴影照片和CH^*自发光照片

Figure 11. High-speed flame shadow images and CH^* chemiluminescence images taken simultaneously in the 5th ignition experiment at location E

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图 12 点火4个阶段末的火焰传播概率图

Figure 12. Flame propagation probability at the end of the four phases of ignition process

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图 13 局部当量比和热释放率分布的模拟结果

Figure 13. Simulation results of local equivalence ratio and heat release rate distribution

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图 14 不同点火位置对第1阶段时间的影响

Figure 14. Influence of different ignition locations on the duration of first stage

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图 15 不同点火位置对第2阶段时间的影响

Figure 15. Influence of different ignition locations on the duration of second stage

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图 16 不同点火位置对第3阶段时间的影响

Figure 16. Influence of different ignition locations on the duration of third stage

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图 17 不同点火位置对第4阶段时间的影响

Figure 17. Influence of different ignition locations on the duration of fourth stage

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表 1 不同点火位置的初始条件

Table 1. Initial conditions for different ignition locations

点火位置	局部当量比	总流速/ （m/s）	分速度/（m/s）
点火位置	局部当量比	总流速/ （m/s）	X轴	Y轴	Z轴
A	0.62	0.65	0.48	0.46	0
B	0.41	0.28	0.27	0.02	−0.02
C	0.56	0.65	0.46	0.46	−0.07
D	0.50	0.51	0.50	−0.01	−0.12
E	0.38	1.24	0.54	1.11	0.08
F	0.41	0.60	0.54	−0.26	−0.09
G	0.36	1.06	0.04	−1.05	0.03
H	0.27	0.77	0.51	−0.57	0.04
I	0.21	2.93	1.14	2.27	1.44
J	0.37	1.41	0.04	−1.42	0.01

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参考文献(33)

[1]	WILLIAM R R. Experimental investigations into high-altitude relight of a gas turbine[D]. Cambridge,East of England,UK: University of Cambridge,2008.
[2]	PAXTON B,TAMBE S B,JENG S M. Systems design and experimental evaluation of a high-altitude relight test facility[R]. ASME Paper 2016-57089,2016.
[3]	MARCHIONE T,AHMED S F,MASTORAKOS E. Ignition of turbulent swirling n-heptane spray flames using single and multiple Sparks[J]. Combustion and Flame,2009,156(1): 166-180. doi: 10.1016/j.combustflame.2008.10.003
[4]	EYSSARTIER A,CUENOT B,GICQUEL L Y M,et al. Using LES to predict ignition sequences and ignition probability of turbulent two-phase flames[J]. Combustion and Flame,2013,160(7): 1191-1207. doi: 10.1016/j.combustflame.2013.01.017
[5]	LEFEBVRE A H. Gas turbine combustion[M]. 2nd Edition. Philadelphia,US: Taylor and Francis,1998.
[6]	MASTORAKOS E. Forced ignition of turbulent spray flames[J]. Proceedings of the Combustion Institute,2017,36(2): 2367-2383. doi: 10.1016/j.proci.2016.08.044
[7]	MASTORAKOS E. Ignition of turbulent non-premixed flames[J]. Progress in Energy and Combustion Science,2009,35(1): 57-97. doi: 10.1016/j.pecs.2008.07.002
[8]	DE OLIVEIRA P M,ALLISON P M,MASTORAKOS E. Ignition of uniform droplet-laden weakly turbulent flows following a laser spark[J]. Combustion and Flame,2019,199: 387-400. doi: 10.1016/j.combustflame.2018.10.009
[9]	KARIUKI J,MASTORAKOS E. Experimental investigation of turbulent flames in uniform dispersions of ethanol droplets[J]. Combustion and Flame,2017,179: 95-116. doi: 10.1016/j.combustflame.2017.01.014
[10]	STAGNI A,ESCLAPEZ L,GOVINDARAJU P,et al. The role of preferential evaporation on the ignition of multicomponent fuels in a homogeneous spray/air mixture[J]. Proceedings of the Combustion Institute,2017,36(2): 2483-2491. doi: 10.1016/j.proci.2016.06.052
[11]	BALLAL D R,LEFEBVRE A H. A general model of spark ignition for gaseous and liquid fuel-air mixtures[J]. Symposium (International) on Combustion,1981,18(1): 1737-1746. doi: 10.1016/S0082-0784(81)80178-6
[12]	BALLAL D R,LEFEBVRE A H. Flame propagation in heterogeneous mixtures of fuel droplets,fuel vapor and air[J]. Symposium (International) on Combustion,1981,18(1): 321-328. doi: 10.1016/S0082-0784(81)80037-9
[13]	BALLAL D R,LEFEBVRE A H. The influence of spark discharge characteristics on minimum ignition energy in flowing gases[J]. Combustion and Flame,1975,24: 99-108. doi: 10.1016/0010-2180(75)90132-7
[14]	AHMED S F. The probabilistic nature of ignition of turbulent highly-strained lean premixed methane-air flames for low-emission engines[J]. Fuel,2014,134: 97-106. doi: 10.1016/j.fuel.2014.05.052
[15]	SITTE M P,BACH E,KARIUKI J,et al. Simulations and experiments on the ignition probability in turbulent premixed bluff-body flames[J]. Combustion Theory and Modelling,2016,20(3): 548-565. doi: 10.1080/13647830.2016.1155756
[16]	MACHOVER E,MASTORAKOS E. Experimental and numerical investigation on spark ignition of linearly arranged non-premixed swirling burners[J]. Combustion Science and Technology,2017,189(8): 1326-1353. doi: 10.1080/00102202.2017.1294589
[17]	CORDIER M,VANDEL A,CABOT G,et al. Laser-induced spark ignition of premixed confined swirled flames[J]. Combustion Science and Technology,2013,185(3): 379-407. doi: 10.1080/00102202.2012.725791
[18]	AHMED S F,MASTORAKOS E. Correlation of spark ignition with the local instantaneous mixture fraction in a turbulent nonpremixed methane jet[J]. Combustion Science and Technology,2010,182(9): 1360-1368. doi: 10.1080/00102201003730984
[19]	COLLIN-BASTIANI F,MARRERO-SANTIAGO J,RIBER E,et al. A joint experimental and numerical study of ignition in a spray burner[J]. Proceedings of the Combustion Institute,2019,37(4): 5047-5055. doi: 10.1016/j.proci.2018.05.132
[20]	LIN Bingxuan,WU Yun,XU Mingxing,et al. Experimental investigation on spark ignition and flame propagation of swirling kerosene spray flames[J]. Fuel,2021,303: 121254. doi: 10.1016/j.fuel.2021.121254
[21]	YANG Siheng,ZHANG Chi,LIN Yuzhen,et al. Experimental investigation of the ignition process in a separated dual-swirl spray flame[J]. Combustion and Flame,2020,219: 161-177. doi: 10.1016/j.combustflame.2020.05.010
[22]	MARRERO-SANTIAGO J,COLLIN-BASTIANI F,RIBER E,et al. On the mechanisms of flame kernel extinction or survival during aeronautical ignition sequences: experimental and numerical analysis[J]. Combustion and Flame,2020,222: 70-84. doi: 10.1016/j.combustflame.2020.08.021
[23]	张弛,王建臣,覃清钦,等. 微型燃气轮机乙醇燃烧室点火与熄火试验[J]. 航空动力学报,2009,24(9): 1930-1936. ZHANG Chi,WANG Jianchen,QIN Qingqin,et al. Experimental research on ignition and lean blowout for micro gas turbine ethanol combustor[J]. Journal of Aerospace Power,2009,24(9): 1930-1936. (in Chinese ZHANG Chi, WANG Jianchen, QIN Qingqin, et al. Experimental research on ignition and lean blowout for micro gas turbine ethanol combustor[J]. Journal of Aerospace Power, 2009, 24(9): 1930-1936. (in Chinese)
[24]	SONG Lanbo,LIU Tao,FU Wei,et al. Experimental study on spray characteristics of ethanol-aviation kerosene blended fuel with a high-pressure common rail injection system[J]. Journal of the Energy Institute,2018,91(2): 203-213. doi: 10.1016/j.joei.2016.12.004
[25]	LIU Guibin,RUAN Can,LI Zilong,et al. Investigation of engine performance for alcohol/kerosene blends as in spark-ignition aviation piston engine[J]. Applied Energy,2020,268: 114959. doi: 10.1016/j.apenergy.2020.114959
[26]	LIU Yu,GU Wu,WANG Jinduo,et al. Study on the laminar burning velocity of ethanol/RP-3 aviation kerosene premixed flame[J]. Combustion and flame,2022,238: 111921. doi: 10.1016/j.combustflame.2021.111921
[27]	NAKAYA S,HIKICHI Y,NAKAZAWA Y,et al. Ignition and supersonic combustion behavior of liquid ethanol in a scramjet model combustor with cavity flame holder[J]. Proceedings of the Combustion Institute,2015,35(2): 2091-2099. doi: 10.1016/j.proci.2014.07.023
[28]	CAVALIERE D E,KARIUKI J,MASTORAKOS E. A comparison of the blow-off behaviour of swirl-stabilized premixed,non-premixed and spray flames[J]. Flow,Turbulence and Combustion,2013,91(2): 347-372. doi: 10.1007/s10494-013-9470-z
[29]	GUO Xiaoyang,HU Erjiang,LI Xiaotian,et al. Experimental study on ignition characteristics of RP-3 jet fuel using nanosecond pulsed plasma discharge[J]. Energies,2021,14(20): 6463. doi: 10.3390/en14206463
[30]	郭晓阳,李孝天,胡二江,等. CH₄/H2-空气预混气流动点火特性[J]. 燃烧科学与技术,2020,26(4): 287-293. GUO Xiaoyang,LI Xiaotian,HU Erjiang,et al. Ignition characteristics in flowing premixed methane/hydrogen-air[J]. Journal of Combustion Science and Technology,2020,26(4): 287-293. (in Chinese GUO Xiaoyang, LI Xiaotian, HU Erjiang, et al. Ignition characteristics in flowing premixed methane/hydrogen-air[J]. Journal of Combustion Science and Technology, 2020, 26(4): 287-293. (in Chinese)
[31]	LEFKOWITZ J K,OMBRELLO T. An exploration of inter-pulse coupling in nanosecond pulsed high frequency discharge ignition[J]. Combustion and Flame,2017,180: 136-147. doi: 10.1016/j.combustflame.2017.02.032
[32]	LIN Bingxuan,WU Yun,ZHANG Zhibo,et al. Multi-channel nanosecond discharge plasma ignition of premixed propane/air under normal and sub-atmospheric pressures[J]. Combustion and Flame,2017,182: 102-113. doi: 10.1016/j.combustflame.2017.04.022
[33]	费力,何立明,陈一,等. 某型航空发动机燃烧室等离子体助燃的数值研究[J]. 燃烧科学与技术,2019,25(5): 451-459. FEI Li,HE Liming,CHEN Yi,et al. Numerical study on plasma-assisted combustion in one type of aero-engine combustion chamber[J]. Journal of Combustion Science and Technology,2019,25(5): 451-459. (in Chinese FEI Li, HE Liming, CHEN Yi, et al. Numerical study on plasma-assisted combustion in one type of aero-engine combustion chamber[J]. Journal of Combustion Science and Technology, 2019, 25(5): 451-459. (in Chinese)