| Citation: | LIU Kunpeng, FU Chen, WANG Xiaoyang, et al. Morphology and response characteristics of CH4/H2 staged swirling flame to external acoustic forcing[J]. Journal of Aerospace Power, 2025, 40（9）：20240341 doi: 10.13224/j.cnki.jasp.20240341
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The effects of hydrogen fraction and stratification ratio on the CH4/H2 staged swirling flame morphology and acoustic forcing response characteristics were investigated through experimental research. The OH* chemiluminescence (OH*-CL) technique and particle imaging velocimetry (PIV) were used to obtain information on heat release and flow field, respectively. The results showed that, under low stratification ratio conditions, the D-shape flame was discovered in the case of absence of hydrogen blending. Under the conditions with the low stratification ratio, the flame transitioned to an S-shape flame as the hydrogen fraction increased, while the overall flame length gradually decreases. Under conditions with high stratification ratio, the flame changed into L-shaped. Furthermore, velocity fluctuations with varying amplitude at 200 Hz were applied to the incoming air, the flame response characteristics under different hydrogen fractions and stratification ratios were analyzed. The different position in the combustor exhibited different sensitivity to velocity fluctuations by altering the flame morphology influenced by the hydrogen fraction and stratification ratio, resulting in varying response levels of primary frequency. Specifically, as the hydrogen fraction increased, the heat release response of the S-shaped flame was enhanced. However, with the increase in stratification ratio, the heat release response of the L-shaped flame diminished. These findings are significant for optimizing low-emission combustor designs and advancing the development of hydrogen engines.
| [1] |
SCHEFER R W, OEFELEIN J C, ROSSMEISSL N P. Reduced turbine emissions using hydrogen-enriched fuels[C]//Proceedings of 2002 Hydrogen and Fuel Cells Merit Review Meeting. Berkeley, US: Office of Energy Efficiency & Renewable Energy, 2002: 1-16.
|
| [2] |
ABDULSADA M, SYRED N, GRIFFITHS A, et al. Effect of swirl number and fuel type upon the flashback in swirl combustors[R]. AIAA 2011-62, 2011.
|
| [3] |
CHIESA P, LOZZA G, MAZZOCCHI L. Using hydrogen as gas turbine fuel[J]. Journal of Engineering for Gas Turbines and Power, 2005, 127(1): 73-80. doi: 10.1115/1.1787513
|
| [4] |
PATEL V, SHAH R. Effect of hydrogen enrichment on combustion characteristics of methane swirling and non-swirling inverse diffusion flame[J]. International Journal of Hydrogen Energy, 2019, 44(52): 28316-28329. doi: 10.1016/j.ijhydene.2019.09.076
|
| [5] |
COZZI F, COGHE A. Behavior of hydrogen-enriched non-premixed swirled natural gas flames[J]. International Journal of Hydrogen Energy, 2006, 31(6): 669-677. doi: 10.1016/j.ijhydene.2005.05.013
|
| [6] |
MAO Runze, WANG Jinhua, ZHANG Weijie, et al. Effect of high hydrogen enrichment on the outer-shear-layer flame of confined lean premixed CH4/H2/air swirl flames[J]. International Journal of Hydrogen Energy, 2021, 46(34): 17969-17981. doi: 10.1016/j.ijhydene.2021.02.181
|
| [7] |
AN Qiang, KHEIRKHAH S, BERGTHORSON J, et al. Flame stabilization mechanisms and shape transitions in a 3D printed, hydrogen enriched, methane/air low-swirl burner[J]. International Journal of Hydrogen Energy, 2021, 46(27): 14764-14779. doi: 10.1016/j.ijhydene.2021.01.112
|
| [8] |
LI Menghan, ZHANG Qiang, LI Guoxiang, et al. Effects of hydrogen addition on the performance of a pilot-ignition direct-injection natural gas engine: a numerical study[J]. Energy & Fuels, 2017, 31(4): 4407-4423.
|
| [9] |
SHANBHOGUE S J, SANUSI Y S, TAAMALLAH S, et al. Flame macrostructures, combustion instability and extinction strain scaling in swirl-stabilized premixed CH4/H2 combustion[J]. Combustion and Flame, 2016, 163: 494-507. doi: 10.1016/j.combustflame.2015.10.026
|
| [10] |
NAM J, YOH J J. A numerical investigation of the effects of hydrogen addition on combustion instability inside a partially-premixed swirl combustor[J]. Applied Thermal Engineering, 2020, 176: 115478. doi: 10.1016/j.applthermaleng.2020.115478
|
| [11] |
WICKSALL D, AGRAWAL A. Acoustics measurements in a lean premixed combustor operated on hydrogen/hydrocarbon fuel mixtures[J]. International Journal of Hydrogen Energy, 2007, 32(8): 1103-1112. doi: 10.1016/j.ijhydene.2006.07.008
|
| [12] |
SELLAN D, BALUSAMY S. Experimental study of swirl-stabilized turbulent premixed and stratified LPG/air flames using optical diagnostics[J]. Experimental Thermal and Fluid Science, 2021, 121: 110281. doi: 10.1016/j.expthermflusci.2020.110281
|
| [13] |
SWEENEY M S, HOCHGREB S, DUNN M J, et al. The structure of turbulent stratified and premixed methane/air flames: Ⅰ non-swirling flows[J]. Combustion and Flame, 2012, 159(9): 2896-2911. doi: 10.1016/j.combustflame.2012.06.001
|
| [14] |
王思睿, 刘训臣, 李磊, 等. 分层比对分层旋流火焰稳定模式及流动结构的影响[J]. 空气动力学学报, 2020, 38(3): 619-628. WANG Sirui, LIU Xunchen, LI Lei, et al. Effects of stratification ratio on flame stabilization and flow structure in stratified swirling flame[J]. Acta Aerodynamica Sinica, 2020, 38(3): 619-628. (in Chinese
WANG Sirui, LIU Xunchen, LI Lei, et al. Effects of stratification ratio on flame stabilization and flow structure in stratified swirling flame[J]. Acta Aerodynamica Sinica, 2020, 38(3): 619-628. (in Chinese)
|
| [15] |
KIM K T, HOCHGREB S. The nonlinear heat release response of stratified lean-premixed flames to acoustic velocity oscillations[J]. Combustion and Flame, 2011, 158(12): 2482-2499. doi: 10.1016/j.combustflame.2011.05.016
|
| [16] |
WANG Xinyao, HAN Xiao, SONG Heng, et al. Combustion instabilities with different degrees of premixedness in a separated dual-swirl burner[J]. Journal of Engineering for Gas Turbines and Power, 2020, 142(6): 061012. doi: 10.1115/1.4047182
|
| [17] |
ZHANG Weijie, WANG Jinhua, MAO Runze, et al. Experimental study of compact swirl flames with lean premixed CH4/H2/air mixtures at stable and near blow-off conditions[J]. Experimental Thermal and Fluid Science, 2021, 122: 110294. doi: 10.1016/j.expthermflusci.2020.110294
|
| [18] |
MENG Sheng, WU Shizhi, ZHANG Man. Numerical and experimental study of flow structure and heat release distribution in a stratified swirl flame with high-speed PIV and OH* measurements[J]. AIP Advances, 2021, 11(7): 075311. doi: 10.1063/5.0056312
|
| [19] |
YAN S, GONG Y, DUAN Z, et al. Investigation of the correlation between OH*, CH* chemiluminescence and heat release rate in methane inverse diffusion flame[J]. Energy, 2023, 283: 129162.
|
| [20] |
AGGARWAL S, XIAO Y, UTHUPPAN J. Effect of stokes number on particle dispersion[J]. Atomization and Sprays, 1994, 4(2): 223-236. doi: 10.1615/AtomizSpr.v4.i2.60
|
| [21] |
ANNA-MARIA K. Experimental investigation of the response of flames with different degrees of premixedness to acoustic oscillations[D]. Cambridge, East of England, UK: University of Cambridge, 2018.
|
| [22] |
CANDEL S, DUROX D, SCHULLER T, et al. Progress and challenges in swirling flame dynamics[J]. Comptes Rendus Mécanique, 2012, 340(11/12): 758-768.
|
| [23] |
刘泽宇, 张弛, 韩啸, 等. 分层比对分开分层旋流预混火焰结构的影响[J]. 航空学报, 2018, 39(3): 121692. LIU Zeyu, ZHANG Chi, HAN Xiao, et al. Effects of stratification ratio on structure of separated stratified premixed swirl flame[J]. Acta Aeronautica et Astronautica Sinica, 2018, 39(3): 121692. (in Chinese
LIU Zeyu, ZHANG Chi, HAN Xiao, et al. Effects of stratification ratio on structure of separated stratified premixed swirl flame[J]. Acta Aeronautica et Astronautica Sinica, 2018, 39(3): 121692. (in Chinese)
|
| [24] |
柳伟杰, 薛然然, 张良, 等. 声激励下低旋流火焰动态响应特性研究[J]. 工程热物理学报, 2022, 43(1): 251-258. LIU Weijie, XUE Ranran, ZHANG Liang, et al. Investigation on dynamic response of a low-swirl flame to acoustic excitation[J]. Journal of Engineering Thermophysics, 2022, 43(1): 251-258. (in Chinese
LIU Weijie, XUE Ranran, ZHANG Liang, et al. Investigation on dynamic response of a low-swirl flame to acoustic excitation[J]. Journal of Engineering Thermophysics, 2022, 43(1): 251-258. (in Chinese)
|
| [25] |
DI SARLI V, DI BENEDETTO A. Laminar burning velocity of hydrogen-methane/air premixed flames[J]. International Journal of Hydrogen Energy, 2007, 32(5): 637-646. doi: 10.1016/j.ijhydene.2006.05.016
|
| [26] |
TURNS S RAn introduction to combustion: concepts and applications[M]. 3rd. ed. Boston, US: McGraw-Hill Education, 2011.
TURNS S RAn introduction to combustion: concepts and applications[M]. 3rd. ed. Boston, US: McGraw-Hill Education, 2011.
|
| [27] |
YUASA S. Effects of swirl on the stability of jet diffusion flames[J]. Combustion and Flame, 1986, 66(2): 181-192. doi: 10.1016/0010-2180(86)90090-8
|
| [28] |
WANG Qian, WANG Jiangtao, MEI Xiaohan, et al. Imaging-based harmonic frequency analysis of a bluff-body premixed flame under acoustic excitations[J]. Aerospace Science and Technology, 2022, 120: 107254. doi: 10.1016/j.ast.2021.107254
|
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