带有局部熄火现象的部分预混火焰大涡模拟研究

doi:10.16183/j.cnki.jsjtu.2019.298

摘要/Abstract

摘要：

对带有局部熄火现象的悉尼部分预混火焰FJ200-5GP-Lr75-103算例进行大涡模拟研究,计算中采用动态k方程亚格子模型和动态增厚火焰(DTF)燃烧模型.考虑当量比变化对层流火焰厚度和速度的影响,在DTF模型中引入两个拟合函数,可根据流场中混合分数的变化自适应调整火焰褶皱函数中的层流火焰参数.研究结果表明,动态k方程模型很好地预测了非均匀预混气的混合分数变化;对于熄火现象比较严重的中下游区域,大涡模拟计算得到的温度、组分的统计信息及温度散点图分布规律与实验数据吻合良好;改进后的DTF模型较好地捕捉到了悉尼非均匀入流部分预混火焰的局部熄火现象, 但对于流场下游CO质量分数的预测,计算值比实验结果存在一些偏离.

关键词: 局部熄火, 部分预混火焰, 增厚火焰模型, 大涡模拟

Abstract:

The Sydney partially premixed flame FJ200-5GP-Lr75-103 case with the local extinction phenomenon is studied by large eddy simulation (LES) coupled with the dynamic k equation sub-grid scale model and the dynamic thickened flame (DTF) combustion model. To account for the influence of non-uniform equivalence ratio on the laminar flame speed and thickness, two fitting functions are introduced in the DTF model to automatically adjust these two parameters in the wrinkling functions, according to the local value of mixture fraction in the flow field. The results show that the dynamic k equation model can predict the mixture fraction of the non-uniform premixed gas in the flow field well. In the middle and downstream with more flame extinction, the temperature, the species profiles, and the scatter plot of temperature versus mixture fraction calculated by LES agree well with the experiment data. This demonstrates that the improved DTF model can capture the local extinction phenomenon in partially premixed flame, but for the CO mass fraction, discrepancy between the LES results and experiment data is presented.

Key words: local extinction, partially premixed flame, thickened flame model, large eddy simulation (LES)

中图分类号:

TK16

曾海翔, 王平, SHROTRIYA Prashant, 姜霖松, MURUGESAN Meenatchidevi. 带有局部熄火现象的部分预混火焰大涡模拟研究[J]. 上海交通大学学报, 2022, 56(1): 35-44.

ZENG Haixiang, WANG Ping, SHROTRIYA Prashant, JIANG Linsong, MURUGESAN Meenatchidevi. Large Eddy Simulation of Partially Premixed Flame with Local Extinction Phenomenon[J]. Journal of Shanghai Jiao Tong University, 2022, 56(1): 35-44.

图/表 11

图1

图2

表1

表2

图3

图4

图5

图6

图7

图8

图9

参考文献 26

[1]	EZEQUIEL J L, HORACIO J A, CESAR L P, et al. Numerical simulation of partially premixed combustion using a flame surface density approach[EB/OL].(2017-11-27) [2019-01-10]. https://xueshu.baidu.com/usercenter/paper/show?paperid=08d2bd52495efb043e88761d9f470a7c&site=xueshu_se.
[2]	AGGARWAL S K, PURI I K. Flame structure interactions and state relationships in an unsteady partially premixed flame[J]. AIAA Journal, 1998, 36(7):1190-1199. doi: 10.2514/2.530 URL
[3]	NAHA S, AGGARWAL S K. Fuel effects on NO_x emissions in partially premixed flames[J]. Combustion and Flame, 2004, 139(1/2):90-105. doi: 10.1016/j.combustflame.2004.07.006 URL
[4]	OMAR S K, GEYER D, DREIZLER A, et al. Investigation of flame structures in turbulent partially premixed counter-flow flames using planar laser-induced fluorescence[J]. Progress in Computational Fluid Dynamics, an International Journal, 2004, 4(3/4/5):241. doi: 10.1504/PCFD.2004.004092 URL
[5]	LOCK A J, BRIONES A M, QIN X, et al. Liftoff characteristics of partially premixed flames under normal and microgravity conditions[J]. Combustion and Flame, 2005, 143(3):159-173. doi: 10.1016/j.combustflame.2005.05.011 URL
[6]	ELBAZ A M, SENOSY M S, ZAYED M F, et al. Highly stabilized partially premixed flames of propane in a concentric flow conical nozzle burner with coflow[J]. Experimental Thermal and Fluid Science, 2018, 95:2-10. doi: 10.1016/j.expthermflusci.2018.01.010 URL
[7]	KIM K T, LEE J G, QUAY B D, et al. Response of partially premixed flames to acoustic velocity and equivalence ratio perturbations[J]. Combustion and Flame, 2010, 157(9):1731-1744. doi: 10.1016/j.combustflame.2010.04.006 URL
[8]	STÖHR M, ARNDT C M, MEIER W. Transient effects of fuel-air mixing in a partially-premixed turbulent swirl flame[J]. Proceedings of the Combustion Institute, 2015, 35(3):3327-3335. doi: 10.1016/j.proci.2014.06.095 URL
[9]	RAMAN V, FOX R O, HARVEY A D. Hybrid finite-volume/transported PDF simulations of a partially premixed methane-air flame[J]. Combustion and Flame, 2004, 136(3):327-350. doi: 10.1016/j.combustflame.2003.10.012 URL
[10]	HEGETSCHWEILER M, JENNY P. An approach to model partially premixed turbulent combustion with probability density function (PDF) methods[J]. PAMM, 2006, 6(1):521-522. doi: 10.1002/(ISSN)1617-7061 URL
[11]	KRONENBURG A, STEIN O T. LES-CMC of a partially premixed, turbulent dimethyl ether jet diffusion flame[J]. Flow, Turbulence and Combustion, 2017, 98(3):803-816. doi: 10.1007/s10494-016-9788-4 URL
[12]	HU Y, KUROSE R. Partially premixed flamelet in LES of acetone spray flames[J]. Proceedings of the Combustion Institute, 2019, 37(3):3327-3334. doi: 10.1016/j.proci.2018.06.020 URL
[13]	BUTLER T D, O’ROURKE P J. A numerical method for two dimensional unsteady reacting flows[J]. Symposium (International) on Combustion, 1977, 16(1):1503-1515. doi: 10.1016/S0082-0784(77)80432-3 URL
[14]	COLIN O, DUCROS F, VEYNANTE D, et al. A thickened flame model for large eddy simulations of turbulent premixed combustion[J]. Physics of Fluids, 2000, 12(7):1843-1863. doi: 10.1063/1.870436 URL
[15]	WANG G, BOILEAU M, VEYNANTE D. Implementation of a dynamic thickened flame model for large eddy simulations of turbulent premixed combustion[J]. Combustion and Flame, 2011, 158(11):2199-2213. doi: 10.1016/j.combustflame.2011.04.008 URL
[16]	KUENNE G, KETELHEUN A, JANICKA J. LES modeling of premixed combustion using a thickened flame approach coupled with FGM tabulated chemistry[J]. Combustion and Flame, 2011, 158(9):1750-1767. doi: 10.1016/j.combustflame.2011.01.005 URL
[17]	FRANZELLI B, RIBER E, GICQUEL L Y M, et al. Large eddy simulation of combustion instabilities in a lean partially premixed swirled flame[J]. Combustion and Flame, 2012, 159(2):621-637. doi: 10.1016/j.combustflame.2011.08.004 URL
[18]	LEGIER J P, POINSOT T, VEYNANTE D. Dynamically thickened flame LES model for premixed and non-premixed turbulent combustion[J]. Proceedings of the Summer Program, Centre for Turbulence Research, 2000: 157-168.
[19]	PROCH F, KEMPF A M. Numerical analysis of the Cambridge stratified flame series using artificial thickened flame LES with tabulated premixed flame chemistry[J]. Combustion and Flame, 2014, 161(10):2627-2646. doi: 10.1016/j.combustflame.2014.04.010 URL
[20]	KUENNE G, KETELHEUN A, JANICKA J. LES modeling of premixed combustion using a thickened flame approach coupled with FGM tabulated chemistry[J]. Combustion and Flame, 2011, 158(9):1750-1767. doi: 10.1016/j.combustflame.2011.01.005 URL
[21]	张科, 尚明涛, 罗坤, 等. 基于动态全增厚火焰模型对甲烷/空气非预混燃烧的大涡模拟[J]. 工程热物理学报, 2012, 33(10):1823-1826.
	ZHANG Ke, SHANG Mingtao, LUO Kun, et al. Large-eddy simulation of methane/air non-premixed combustion using dynamically full thickened flame model[J]. Journal of Engineering Thermophysics, 2012, 33(10):1823-1826.
[22]	HUANG S H, LI Q S. A new dynamic one-equation subgrid-scale model for large eddy simulations[J]. International Journal for Numerical Methods in Engineering, 2010, 81(7):835-865.
[23]	BARLOW R S, MEARES S, MAGNOTTI G, et al. Local extinction and near-field structure in piloted turbulent CH₄/air jet flames with inhomogeneous inlets[J]. Combustion and Flame, 2015, 162(10):3516-3540. doi: 10.1016/j.combustflame.2015.06.009 URL
[24]	FRANZELLI B, RIBER E, CUENOT B. Impact of the chemical description on a large eddy simulation of a lean partially premixed swirled flame[J]. Comptes Rendus Mécanique, 2013, 341(1/2):247-256. doi: 10.1016/j.crme.2012.11.007 URL
[25]	LU T F, LAW C K. A criterion based on computational singular perturbation for the identification of quasi steady state species: A reduced mechanism for methane oxidation with NO chemistry[J]. Combustion and Flame, 2008, 154(4):761-774. doi: 10.1016/j.combustflame.2008.04.025 URL
[26]	TOSHIMITSU K, MATSUO A, KAMEL M R, et al. Numerical simulations and planar laser-induced fluorescence imaging results of hypersonic reactive flows[J]. Journal of Propulsion and Power, 2000, 16(1):16-21. doi: 10.2514/2.5558 URL

参数	U103
U/(m·s^-1)	103.0
U_A/(m·s^-1)	107.2
U_F/(m·s^-1)	120.6

参数	U103
w(N₂)	0.719
w(CO₂)	0.116
w(H₂O)	0.117
w(O₂)	0.019
w(CO)	0.029
U_p/(m·s^-1)	27.81
T/K	2081.1