Numerical investigation of ignition location effects on ignition process in skirted evaporative flameholders
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摘要:
为提升蒸发式火焰稳定器点火性能、揭示其点火过程规律、指导工程实际中点火位置选择，在来流温度为483 K、马赫数为0.2的条件下，以裙板型蒸发式火焰稳定器为研究对象，通过大涡模拟方法，得到了裙板型蒸发式火焰稳定器在不同径向点火位置处点火性能及点火过程，总结了点火位置对点火过程及点火性能的影响规律。结果表明：由于壁面燃油富集作用，靠近裙板的点火位置具有最优的点火性能，点火位置R1模拟贫油点火极限油气比为
0.0007 ，点火位置R2与R3均为0.0011 ，点火位置R2与R3处贫油点火油气比相较R1增大57.1%，不同点火位置点火过程具有相同的发展趋势，点火位置处局部流场不同引起了火焰传播路径的变化，燃油浓度场影响占主要影响地位。-
关键词:
- 裙板型蒸发式火焰稳定器 /
- 径向点火位置 /
- 点火过程 /
- 大涡模拟 /
- 贫油点火
Abstract:In order to enhance the ignition performance of the evaporative flameholder, reveal the inherent patterns of its ignition process, and provide a guidance for ignition location selection in engineering practice, the skirted evaporative flameholder under inflow conditions of 483 K temperature and Mach number 0.2 was investigated. Through large eddy simulation methodology, the ignition performance and ignition processes at different radial ignition locations were systematically examined, with particular emphasis on elucidating the influence of ignition location on flame development characteristics. The results demonstrated that the ignition location adjacent to the skirt plate (designated as R1) exhibited superior ignition characteristics attributable to wall-induced fuel enrichment effects. Computational simulations revealed a lean ignition limit fuel-air ratio of
0.0007 at position R1, whereas positions R2 and R3 displayed significantly elevated values of0.0011 . Notably, the lean ignition fuel-air ratio at positions R2 and R3 manifested a 57.1% enhancement relative to that observed at position R1, quantitatively confirming the spatial dependence of ignition performance in wall-bounded configurations. Although ignition processes at different locations exhibited similar developmental trends, variations in local flow field characteristics at the ignition sites induced distinct alterations in flame propagation paths. Comparative analysis revealed that the fuel concentration field exerted dominant influence on the ignition dynamics compared with aerodynamic factors. -
图 2 非反应速度场收敛计算
Figure 2. Transient convergence characteristics of non-reacting velocity field
图 3 非反应燃油场收敛计算
Figure 3. Transient convergence characteristics of non-reacting fuel field
图 4 裙板型蒸发式火焰稳定器三维结构示意图
Figure 4. Three-dimensional schematic of skirted evaporative flameholder
图 7 变网格数下裙板型蒸发式火焰稳定器x=0.10 m截面的时均流向速度分布
Figure 7. Time-averaged axial velocity distributions at x=0.10 m cross-section of skirted evaporative flameholder under varying mesh densities
图 8 湍动能求解率分布云图（$ Ma_{\infty}=0.2、T_{\infty}=483\; \mathrm{K} $）
Figure 8. Contour plot of turbulent kinetic energy solution convergence rate （$ {Ma}_{\infty }=0.2,{T}_{\infty }=483\;\mathrm{K} $）
图 10 大涡模拟结果（$ {Ma}_{\mathrm{\infty }}=0.125\mathrm{、}{T}_{\mathrm{\infty }}=500\;\mathrm{K}\mathrm{、}{p}_{\mathrm{\infty }}=0.1\;\mathrm{M}\mathrm{P}\mathrm{a} $、f=
0.0026 ）Figure 10. Results of large eddy simulations （$ {Ma}_{\infty }=0.125,{T}_{\infty }=500\;{\mathrm{K}},{p}_{\infty }=0.1\;{\mathrm{MPa}} $, f=
0.0026 ）
图 12 裙板型蒸发式火焰稳定器时均流线图（$ {Ma}_{\infty }=0.2 $，z=0.04 m截面）
Figure 12. Time-averaged flow diagram of skirted evaporative flameholder （$ {Ma}_{\infty }=0.2 $, z=0.04 m）
图 13 贫油点火油气比逐次逼近法示意图
Figure 13. Schematic diagram of the step-by-step approximation of the fuel-air ratio for lean fuel ignition
图 14 径向点火位置对贫油点火油气比的影响
Figure 14. Impact of radial ignition location on fuel-air ratio Requirements for Fuel-Lean Ignition
图 16 点火过程示意图（$ {Ma}_{\mathrm{\infty }}=0.2 $、$ {T}_{\mathrm{\infty }}=483\;{\mathrm{K}}\mathrm{、}{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $、R1）
Figure 16. Schematic diagram of the ignition process （$ {Ma}_{\mathrm{\infty }}=0.2 $,$ {T}_{\mathrm{\infty }}=483\;\mathrm{K},{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $, R1）
图 18 点火过程中火焰体积$ {W}_{\mathrm{f}\mathrm{l}\mathrm{a}\mathrm{m}\mathrm{e}} $变化（$ {Ma}_{\mathrm{\infty }}=0.2 $、$ {T}_{\mathrm{\infty }}=483\;{\mathrm{K}}\mathrm{、}{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1\mathrm{、}\mathrm{R}1 $）
Figure 18. Variation of flame volume $ {W}_{\mathrm{f}\mathrm{l}\mathrm{a}\mathrm{m}\mathrm{e}} $ during ignition process （$ {Ma}_{\mathrm{\infty }}=0.2 $,$ {T}_{\mathrm{\infty }}=483\;\mathrm{K},{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1,\mathrm{ }\mathrm{R}1 $）
图 19 点火过程中火焰体积$ {W}_{\mathrm{f}\mathrm{l}\mathrm{a}\mathrm{m}\mathrm{e}} $随时间的变化（$ {Ma}_{\mathrm{\infty }}=0.2 $、$ {T}_{\mathrm{\infty }}=483\;\mathrm{K}\mathrm{、}{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $、R1～R3）
Figure 19. Variation of flame volume $ {W}_{\mathrm{f}\mathrm{l}\mathrm{a}\mathrm{m}\mathrm{e}} $ with time during the ignition process （$ {Ma}_{\mathrm{\infty }}=0.2 $,$ {T}_{\mathrm{\infty }}=483\;\mathrm{K},{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $，R1～R3）
图 20 点火过程中$ {t}_{\mathrm{S}1} $～$ {t}_{\mathrm{S}3} $随点火位置的变化（$ {Ma}_{\mathrm{\infty }}=0.2 $、$ {T}_{\mathrm{\infty }}=483\;\mathrm{K}\mathrm{、}{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $、R1～R3）
Figure 20. Variation of $ {t}_{\mathrm{S}1} $～$ {t}_{\mathrm{S}3} $ with ignition location during ignition process （$ {Ma}_{\mathrm{\infty }}=0.2 $, $ {T}_{\mathrm{\infty }}=483\;\mathrm{K},\;{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $, R1～R3）
图 21 点火过程温度云图（$ {Ma}_{\mathrm{\infty }}=0.2 $、 $ T_{\mathrm{\infty}}=483\; \mathrm{K}、f_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\; 1 $、 R1～R3）
Figure 21. Variation of temperature cloud during ignition process （$ {Ma}_{\mathrm{\infty }}=0.2 $, $ {T}_{\mathrm{\infty }}=483\;{\mathrm{K}},\;{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $, R1～R3）
图 22 S1阶段火焰传播轨迹简化图（$ {Ma}_{\mathrm{\infty }}=0.2 $、$ {T}_{\mathrm{\infty }}=483\;\mathrm{K}\mathrm{、}{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $）
Figure 22. Simplified diagram of flame propagation trajectory in stage S1 （$ {Ma}_{\mathrm{\infty }}=0.2 $,$ {T}_{\mathrm{\infty }}=483\mathrm{K},{f}_{\mathrm{t}\mathrm{o}\mathrm{t}\mathrm{a}\mathrm{l}}=0.001\;1 $）
表 1 点火位置对裙板型蒸发式稳定器点火性能影响的数值模拟结果
Table 1. Numerical simulation results on the effect of ignition location on the ignition performance of skirted evaporative flameholder
模拟
序号点火
位置试验贫油点火
极限油气比$ {{f}_{\mathrm{l}\mathrm{l}\mathrm{o},\mathrm{e}\mathrm{x}\mathrm{p}}} $[17]模拟点火
油气比$ {f}_{\mathrm{n}\mathrm{u}\mathrm{m}} $数值模拟
点火结果R1F1 R1 0.0006 0.0011 √ R1F2 0.001 √ R1F3 0.0009 √ R1F4 0.0008 √ R1F5 0.0007 √ R1F6 0.0006 × R2F1 R2 0.0009 0.0011 √ R2F2 0.001 × R2F3 0.0009 × R3F1 R3 0.0011 √ R3F2 0.001 × R3F3 0.0009 × 
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[1] KUO S C, DOERNBACH J D, CHAMPAGNE G, et al. A scoping study for Hypersonic Transport Propulsion Systems: ASME Paper 92-GT-409[R]. New York, US: ASME, 1992. [2] SAUNDERS J, STUEBER T, THOMAS S, et al. Testing of the NASA hypersonics project combined cycle engine large scale inlet mode transition experiment (CCE LlMX): NASA/TM-2012-217217[R]. Hanover, US: ASME, 2012. [3] 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 [4] AHMED S F, MASTORAKOS E. Spark ignition of lifted turbulent jet flames[J]. Combustion and Flame, 2006, 146(1/2): 215-231. [5] 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 [6] ESCLAPEZ L, RIBER E, CUENOT B. Ignition probability of a partially premixed burner using LES[J]. Proceedings of the Combustion Institute, 2015, 35(3): 3133-3141. doi: 10.1016/j.proci.2014.07.040 [7] 李晶茹, 黄勇. 火花能量及相位对点火成功率影响的数值模拟[J/OL]. 航空动力学报, 2023: 1-11. (2023-09-04) [2025-02-25]. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=HKDI20230901008&dbname=CJFD&dbcode=CJFQ. LI Jingru, HUANG Yong. Numerical simulation of the influence of spark energy and phase on ignition success rate[J/OL]. China Industrial Economics, 2023: 1-11. (2023-09-04) [2025-02-25]. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=HKDI20230901008&dbname=CJFD&dbcode=CJFQ. (in ChineseLI Jingru, HUANG Yong. Numerical simulation of the influence of spark energy and phase on ignition success rate[J/OL]. China Industrial Economics, 2023: 1-11. (2023-09-04) [2025-02-25]. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=HKDI20230901008&dbname=CJFD&dbcode=CJFQ. (in Chinese) [8] FEI Li, ZHAO Bingbing, LIU Xiong, et al. Application study on plasma ignition in aeroengine strut-cavity-injector integrated afterburner[J]. Plasma Science and Technology, 2021, 23(10): 105504. doi: 10.1088/2058-6272/ac183c [9] 王洪妍, 黄勇, 刘云峰, 等. 火花相位对点火成功率影响的大涡模拟[J]. 航空动力学报, 2022, 37(10): 2344-2351. WANG Hongyan, HUANG Yong, LIU Yunfeng, et al. Large eddy simulation on effect of spark phases on ignition reliability[J]. Journal of Aerospace Power, 2022, 37(10): 2344-2351. (in ChineseWANG Hongyan, HUANG Yong, LIU Yunfeng, et al. Large eddy simulation on effect of spark phases on ignition reliability[J]. Journal of Aerospace Power, 2022, 37(10): 2344-2351. (in Chinese) [10] WANG Xiwei, HUANG Yong, LIU Yunfeng, et al. Effect of the ignition location on lean light-off limits for a gas turbine combustor[J]. Combustion and Flame, 2022, 245: 112295. doi: 10.1016/j.combustflame.2022.112295 [11] 王家骅. 蒸发式火焰稳定器的稳定机理研究[J]. 南京航空航天大学学报, 1980, 25(1): 69-84. WANG Jiaye. Investigation of the stabilization mechanism in evaporative flameholders[J]. Journal of Nanjing University of Aeronautics and Astronautics, 1980, 25(1): 69-84. (in ChineseWANG Jiaye. Investigation of the stabilization mechanism in evaporative flameholders[J]. Journal of Nanjing University of Aeronautics and Astronautics, 1980, 25(1): 69-84. (in Chinese) [12] 缪俊杰, 范育新, 吴伟秋, 等. 蒸发式Z形值班火焰稳定器的点火性能[J]. 航空动力学报, 2020, 35(7): 1457-1465. MIAO Junjie, FAN Yuxin, WU Weiqiu, et al. Ignition characteristics in evaporating Z-shaped pilot flame-holder[J]. Journal of Aerospace Power, 2020, 35(7): 1457-1465. (in ChineseMIAO Junjie, FAN Yuxin, WU Weiqiu, et al. Ignition characteristics in evaporating Z-shaped pilot flame-holder[J]. Journal of Aerospace Power, 2020, 35(7): 1457-1465. (in Chinese) [13] 于文博, 范育新, 岳晨, 等. 一种蒸发式凹腔驻涡值班稳定器的流动与点火性能研究[J]. 推进技术, 2023, 44(5): 2206053. YU Wenbo, FAN Yuxin, YUE Chen, et al. Flow characteristics and ignition performance analysis of an evaporating cavity trapped vortex pilot flame-holder[J]. Journal of Propulsion Technology, 2023, 44(5): 2206053. (in ChineseYU Wenbo, FAN Yuxin, YUE Chen, et al. Flow characteristics and ignition performance analysis of an evaporating cavity trapped vortex pilot flame-holder[J]. Journal of Propulsion Technology, 2023, 44(5): 2206053. (in Chinese) [14] 范育新, 于文博, 岳晨, 等. 一种燃油预蒸发式凹腔驻涡火焰稳定器及其工作方法: CN115076722A[P]. 2022-09-20. [15] 刘玉英, 高昭, 谢奕, 等. 一种径向点火的蒸发式火焰稳定器: CN104819484B[P]. 2018-08-24. [16] ZHU Zhixiang, ZHANG Zhibin, HUANG Yakun, et al. Experimental study on the characteristics of a novel aerodynamic wake width flameholder[J]. Aerospace Science and Technology, 2023, 143: 108695. doi: 10.1016/j.ast.2023.108695 [17] 高昭. 蒸发式火焰稳定器点火性能研究[D]. 北京: 北京航空航天大学, 2016. GAO Zhao. Research on the ignition performance of vapor flameholder[D]. Beijing: Beihang University, 2016. (in ChineseGAO Zhao. Research on the ignition performance of vapor flameholder[D]. Beijing: Beihang University, 2016. (in Chinese) [18] 刘冉, 刘玉英, 高昭. 结构参数对蒸发式火焰稳定器贫油熄火性能的影响及其预测方法研究[J]. 推进技术, 2017, 38(12): 2753-2760. LIU Ran, LIU Yuying, GAO Zhao. Structural parameters effects on lean blowout performance and prediction method for piloted vaporization flameholder[J]. Journal of Propulsion Technology, 2017, 38(12): 2753-2760. (in ChineseLIU Ran, LIU Yuying, GAO Zhao. Structural parameters effects on lean blowout performance and prediction method for piloted vaporization flameholder[J]. Journal of Propulsion Technology, 2017, 38(12): 2753-2760. (in Chinese) [19] 冯玉桦, 刘玉英, 邓远灏, 等. 含湿量对蒸发式火焰稳定器贫油熄火性能的影响[J]. 航空动力学报, 2020, 35(9): 1866-1874. FENG Yuhua, LIU Yuying, DENG Yuanhao, et al. Effects of humidity ratio on lean blowout performance of piloted vaporization flameholder[J]. Journal of Aerospace Power, 2020, 35(9): 1866-1874. (in ChineseFENG Yuhua, LIU Yuying, DENG Yuanhao, et al. Effects of humidity ratio on lean blowout performance of piloted vaporization flameholder[J]. Journal of Aerospace Power, 2020, 35(9): 1866-1874. (in Chinese) [20] 黄亚坤, 朱志祥, 朱焕宇, 等. 蒸发槽火焰稳定器低压点火过程试验研究[J]. 工程热物理学报, 2024, 24(10): 3196-3208. HUANG Yakun, ZHU Zhixiang, ZHU Huangyu, et al. Experimental investigation on the ignition process of the evaporative flame holder under the subatmospheric[J]. Journal of Engineering Thermophysics, 2024, 24(10): 3196-3208. (in ChineseHUANG Yakun, ZHU Zhixiang, ZHU Huangyu, et al. Experimental investigation on the ignition process of the evaporative flame holder under the subatmospheric[J]. Journal of Engineering Thermophysics, 2024, 24(10): 3196-3208. (in Chinese) [21] JONES W P, TYLISZCZAK A. Large eddy simulation of spark ignition in a gas turbine combustor[J]. Flow, Turbulence and Combustion, 2010, 85(3): 711-734. [22] 王方, 许春晓, 王家骅, 等. 稳定器流动、燃烧实验及冷态大涡模拟研究[J]. 航空动力学报, 2006, 21(3): 502-506. WANG Fang, XU Chunxiao, WANG Jiahua, et al. Experimental studies of flow and combustion with a flame-holder and LES of the flow[J]. Journal of Aerospace Power, 2006, 21(3): 502-506. (in Chinese doi: 10.3969/j.issn.1000-8055.2006.03.012WANG Fang, XU Chunxiao, WANG Jiahua, et al. Experimental studies of flow and combustion with a flame-holder and LES of the flow[J]. Journal of Aerospace Power, 2006, 21(3): 502-506. (in Chinese) doi: 10.3969/j.issn.1000-8055.2006.03.012 [23] 徐维. 贫燃预混旋流燃烧大涡模拟及模型对比分析[D]. 辽宁 大连: 大连理工大学, 2019. XU Wei. Large eddy simulation and model comparison analysis of lean premixed swirl combustion[D]. Dalian Liaoning: Dalian University of Technology, 2019. (in ChineseXU Wei. Large eddy simulation and model comparison analysis of lean premixed swirl combustion[D]. Dalian Liaoning: Dalian University of Technology, 2019. (in Chinese) [24] FRANZELLI B, RIBER E, SANJOSÉ M, et al. A two-step chemical scheme for kerosene–air premixed flames[J]. Combustion and Flame, 2010, 157(7): 1364-1373. doi: 10.1016/j.combustflame.2010.03.014 [25] 《中国航空材料手册》编辑委员会. 中国航空材料手册: 第4卷 钛合金 铜合金[M]. 2版. 北京: 中国标准出版社, 2002: 278-279. Editorial Committee of China Aviation Materials Manual. China aviation materials manual: 4 titanium alloy and copper alloy[M]. 2nd ed. Beijing: Standards Press of China, 2022: 278-279. (in ChineseEditorial Committee of China Aviation Materials Manual. China aviation materials manual: 4 titanium alloy and copper alloy[M]. 2nd ed. Beijing: Standards Press of China, 2022: 278-279. (in Chinese) [26] QIAO Yingjie, MAO Ronghai, LIN Yuzhen. Large eddy simulation of the ignition performance in a lean burn combustor: GT2015-43872 [R]. Montreal, Canada: ASME, 2015. [27] LACAZE G, RICHARDSON E, POINSOT T. Large eddy simulation of spark ignition in a turbulent methane jet[J]. Combustion and Flame, 2009, 156(10): 1993-2009. doi: 10.1016/j.combustflame.2009.05.006 [28] POPE S B. Ten questions concerning the large-eddy simulation of turbulent flows[J]. New Journal of Physics, 2004, 6: 35. doi: 10.1088/1367-2630/6/1/035 [29] HERVO L, SENONER J M, BIANCHERIN A, et al. Large-eddy simulation of kerosene spray ignition in a simplified aeronautic combustor[J]. Flow, Turbulence and Combustion, 2018, 101(2): 603-625. doi: 10.1007/s10494-018-9924-4 -
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