天然气层流燃烧特性的实验与数值计算

党嘉莹; 曾文; 陈潇潇; 谷午; 胡二江; 马宏宇

doi:10.13224/j.cnki.jasp.20210468

天然气层流燃烧特性的实验与数值计算

doi: 10.13224/j.cnki.jasp.20210468

党嘉莹¹,
曾文^1,*, ,,
陈潇潇¹,
谷午¹,
胡二江²,
马宏宇³

1.
沈阳航空航天大学航空发动机学院，沈阳 110136
2.
西安交通大学动力工程多相流国家重点实验室，西安 710049
3.
中国航发沈阳发动机研究所，沈阳 110015

基金项目: 国家科技重大专项（2017-Ⅲ-0006-0031)

详细信息

作者简介:
党嘉莹（1996-），女，硕士生，主要从事碳氢燃料基础燃烧特性研究

通讯作者:
曾文（1977-），男，教授，博士，主要从事发动机先进燃烧技术研究。E-mail：zengwen928@sohu.com

中图分类号: V231.2；TK401
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出版历程
- 收稿日期: 2021-08-22
- 网络出版日期: 2023-11-01

Simulation and experiment on the laminar combustion characteristics of natural gas

1.
School of Aero-engine，Shenyang Aerospace University，Shenyang 110136，China
2.
State Key Laboratory of Multiphase Flow in Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China
3.
Shenyang Engine Research Institute，Aero Engine Corporation of China，Shenyang 110015，China

摘要

摘要:
在定容弹中试验测量了压力分别为0.1、0.2、0.3 MPa，当量比范围为0.7～1.4，温度分别为300、350、400 K，O₂体积分数分别为15%、18%、21%，CO₂体积分数分别为0%、10%、20%，H₂O体积分数分别为0%、10%、20%工况条件下天然气（0.9甲烷/0.07乙烷/0.03丙烷，摩尔分数）的火焰发展特性以及层流燃烧速度。同时，利用敏感性分析等方法构建了天然气的简化反应机理（40种组分和189个反应），并对其层流燃烧速度进行了数值计算。结果表明：当当量比由0.7提升至1.4时，天然气的层流燃烧速度先升高后降低，其峰值在当量比1.1附近；层流燃烧速度随着初始温度、O₂体积分数的增多或初始压力、CO₂及H₂O体积分数的减少而逐渐得到提升。构建的天然气简化反应机理可以较好的预测层流燃烧速度随当量比变化的整体趋势；但是，部分工况下预测值略低于试验值。
- 天然气 /
- 层流燃烧速度 /
- 定容弹 /
- 简化反应机理 /
- 敏感性分析
Abstract:
The flame propagation characteristics and laminar combustion speeds of natural gas (0.9 methane/0.07 ethane/0.03 propane, mole fraction) were experimentally tested in the constant volume bomb under the conditions of the pressures of 0.1, 0.2, 0.3 MPa, the equivalence ratios range of 0.7−1.4, the temperatures of 300, 350, 400 K, the contents of O₂ of 15%, 18%, 21%, the contents of CO₂ and H₂O of 0%, 10%, 20%. Meanwhile, the simplified reaction mechanism of natural gas (including 40 species and 189 reactions) was constructed by sensitivity analysis and other methods, and the laminar combustion speeds of natural gas were calculated numerically. The results showed that as the equivalent ratio increased from 0.7 to 1.4, the laminar combustion speeds of natural gas rose and then declined, and the peak appears near the equivalent ratio was 1.1; With the increase of initial temperature and the content of O₂ or the decrease of initial pressure, the contents of CO₂ and H₂O, the laminar combustion speeds gradually increased. The simplified reaction mechanism of natural gas constructed hereto can better predict the overall trends of the laminar combustion speed with the equivalent ratio. However, the predicted values were slightly lower than the experimental values under certain conditions.
- natural gas /
- laminar combustion speed /
- constant volume bomb /
- simplified reaction mechanism /
- sensitivity analysis

HTML

图 1 试验平台装置图

Figure 1. Device diagram of the experimental platform

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图 2 定容弹示意图

Figure 2. Schematic diagram of constant volume bomb

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图 3 当量比对天然气层流火焰发展的影响（p=0.1 MPa、T=350 K）

Figure 3. Effect of equivalent ratio on the laminar flame development of natural gas （p=0.1 MPa, T=350 K）

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图 4 初始温度对天然气层流火焰发展的影响（p=0.1 MPa、ϕ=1.0）

Figure 4. Effect of initial temperature on the laminar flame development of natural gas （p=0.1 MPa, ϕ=1.0）

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图 5 初始压力对天然气层流火焰发展的影响（T=350 K、ϕ=1.0）

Figure 5. Effect of initial pressure on the laminar flame development of natural gas （T=350 K, ϕ=1.0）

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图 6 O₂体积分数对天然气层流火焰发展的影响（p=0.1 MPa、T=400 K、ϕ=1.0）

Figure 6. Effect of the content of O₂ on the laminar flame development of natural gas （p=0.1 MPa, T=400 K, ϕ=1.0）

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图 7 CO₂体积分数对天然气层流火焰发展的影响（p=0.1 MPa、T=400 K、ϕ=1.0）

Figure 7. Effect of the content of CO₂ on the laminar flame development of natural gas （p=0.1 MPa, T=400 K, ϕ=1.0）

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图 8 H₂O体积分数对天然气层流火焰发展的影响（p=0.1 MPa、T=400 K、ϕ=1.0）

Figure 8. Effect of the content of H₂O on the laminar flame development of natural gas （p=0.1 MPa, T=400 K, ϕ=1.0）

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图 9 不同工况下天然气层流燃烧过程中的火焰发展特性

Figure 9. Flame development characteristics in laminar combustion of natural gas at different working conditions

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图 10 不同工况下天然气的层流燃烧速度

Figure 10. Laminar combustion speeds of natural gas at different working conditions

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表 1 试验工况

Table 1. Experiment conditions

工况	当量比	初始压力/MPa	初始温度/K	体积分数/%
工况	当量比	初始压力/MPa	初始温度/K	O₂	CO₂	H₂O
1	0.7～1.4	0.1	350	21	0	0
		0.2
		0.3
2	0.7～1.4	0.1	300	21	0	0
2	0.7～1.4	0.1	400	21	0	0
3	0.7～1.4	0.1	400	15	0	0
3	0.7～1.4	0.1	400	18	0	0
4	0.7～1.4	0.1	400	18.9	10	0
4	0.7～1.4	0.1	400	16.8	20	0
5	0.7～1.4	0.1	400	18.9	0	10
5	0.7～1.4	0.1	400	16.8	0	20

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参考文献(19)

[1]	尉曙明,索建秦. 航空衍生工业燃气轮机双燃料贫燃预混低污染燃烧技术[J]. 航空动力学报,2015,30(9): 2049-2057. WEI Shuming,SUO Jianqin. Aero-derivative industrial gas turbine dual fuel lean premixed low emission combustion technology[J]. Journal of Aerospace Power,2015,30(9): 2049-2057. (in Chinese doi: 10.13224/j.cnki.jasp.2015.09.001 WEI Shuming, SUO Jianqin. Aero-derivative industrial gas turbine dual fuel lean premixed low emission combustion technology[J]. Journal of Aerospace Power, 2015, 30(9): 2049-2057. (in Chinese) doi: 10.13224/j.cnki.jasp.2015.09.001
[2]	BULAT G,JONES W P,MARQUIS A J. NO and CO formation in an industrial gas-turbine combustion chamber using LES with the Eulerian sub-grid PDF method[J]. Combustion and Flame,2014,161(7): 1804-1825. doi: 10.1016/j.combustflame.2013.12.028
[3]	DE ALMEIDA D S,LACAVA P T. Analysis of pollutant emissions in double-stage swirl chamber for gas turbine application[J]. Energy Procedia,2015,66: 117-120. doi: 10.1016/j.egypro.2015.02.067
[4]	LYRA S,CANT R S. Analysis of high pressure premixed flames using Equivalent Reactor Networks for predicting NOx emissions[J]. Fuel,2013,107: 261-268. doi: 10.1016/j.fuel.2012.12.066
[5]	STARIK A M,KOZLOV V E,LEBEDEV A B,et al. Application of reactor net models for the simulation of gas-turbine combustor emissions[J]. International Journal of Sustainable Aviation,2014,1(1): 43-57. doi: 10.1504/IJSA.2014.062867
[6]	KUMAR K,SUNG C J,HUI Xin. Laminar flame speeds and extinction limits of conventional and alternative jet fuels[J]. Fuel,2011,90(3): 1004-1011. doi: 10.1016/j.fuel.2010.11.022
[7]	BOSSCHAART K J,DE GOEY L P H. The laminar burning velocity of flames propagating in mixtures of hydrocarbons and air measured with the heat flux method[J]. Combustion and Flame,2004,136(3): 261-269. doi: 10.1016/j.combustflame.2003.10.005
[8]	WANG Shuangfeng,ZHANG Hai,JAROSINSKI J,et al. Laminar burning velocities and Markstein lengths of premixed methane/air flames near the lean flammability limit in microgravity[J]. Combustion and Flame,2010,157(4): 667-675. doi: 10.1016/j.combustflame.2010.01.006
[9]	汤成龙,张旭辉,司占博,等. 甲烷/乙烷-空气预混层流燃烧特性试验和数值模拟研究[J]. 内燃机工程,2016,37(1): 83-88. TANG Chenglong,ZHANG Xuhui,SI Zhanbo,et al. Experimental and numerical investigation on the laminar flame characteristics of CH₄/C₂H₆-air mixture[J]. Chinese Internal Combustion Engine Engineering,2016,37(1): 83-88. (in Chinese doi: 10.13949/j.cnki.nrjgc.2016.01.015 TANG Chenglong, ZHANG Xuhui, SI Zhanbo, et al. Experimental and numerical investigation on the laminar flame characteristics of CH₄/C₂H₆-air mixture[J]. Chinese Internal Combustion Engine Engineering, 2016, 37(1): 83-88. (in Chinese) doi: 10.13949/j.cnki.nrjgc.2016.01.015
[10]	曾文,刘靖,马洪安,等. 氮气稀释气对天然气燃烧特性的影响[J]. 热科学与技术,2019,18(3): 219-227. ZENG Wen,LIU Jing,MA Hongan,et al. Effects of nitrogen diluent gas on the combustion characteristics of natural gas[J]. Journal of Thermal Science and Technology,2019,18(3): 219-227. (in Chinese doi: 10.13738/j.issn.1671-8097.018098 ZENG Wen, LIU Jing, MA Hongan, et al. Effects of nitrogen diluent gas on the combustion characteristics of natural gas[J]. Journal of Thermal Science and Technology, 2019, 18(3): 219-227. (in Chinese) doi: 10.13738/j.issn.1671-8097.018098
[11]	宋占锋,张欣,胡尚飞,等. CO₂稀释对天然气掺氢预混层流火焰燃烧特性的影响[J]. 燃烧科学与技术,2016,22(5): 408-412. SONG Zhanfeng,ZHANG Xin,HU Shangfei,et al. Effect of CO₂ diluent gas on combustion characteristic of laminar flame of premixed hydrogen enriched natural gas and air mixtures[J]. Journal of Combustion Science and Technology,2016,22(5): 408-412. (in Chinese SONG Zhanfeng, ZHANG Xin, HU Shangfei, et al. Effect of CO₂ diluent gas on combustion characteristic of laminar flame of premixed hydrogen enriched natural gas and air mixtures[J]. Journal of Combustion Science and Technology, 2016, 22(5): 408-412. (in Chinese)
[12]	TANG Chenglong,ZHANG Shuang,SI Zhanbo,et al. High methane natural gas/air explosion characteristics in confined vessel[J]. Journal of Hazardous Materials,2014,278: 520-528. doi: 10.1016/j.jhazmat.2014.06.047
[13]	LIAO S Y,JIANG D M,GAO J,et al. Measurements of markstein numbers and laminar burning velocities for natural gas–air mixtures[J]. Energy & Fuels,2004,18(2): 316-326.
[14]	LIU Yu,LUO Rui,SUN Zhen,et al. Experimental study on the Markstein length and laminar burning velocity of CH₄/RP-3 mixture[J]. Journal of Mechanical Science and Technology,2017,31(11): 5527-5537. doi: 10.1007/s12206-017-1047-7
[15]	ZENG Wen,LIU Jing,LIU Yu,et al. The effect of hydrogen addition on the combustion characteristics of RP-3 kerosene/air premixed flames[J]. Energies,2017,10(8): 1107.1-1107.12.
[16]	CHANG Yachao,JIA Ming,NIU Bo,et al. Reduction of large-scale chemical mechanisms using global sensitivity analysis on reaction class/sub-mechanism[J]. Combustion and Flame,2020,212: 355-366. doi: 10.1016/j.combustflame.2019.11.019
[17]	CHANG Yachao,JIA Ming,FAN Weiwei,et al. Decoupling methodology: an effective way for the development of reduced and skeletal mechanisms[J]. Acta Physico-Chimica Sinica,2016,32(9): 2209-2215. doi: 10.3866/PKU.WHXB201605262
[18]	BURKE U,METCALFE W K,BURKE S M,et al. A detailed chemical kinetic modeling,ignition delay time and jet-stirred reactor study of methanol oxidation[J]. Combustion and Flame,2016,165: 125-136. doi: 10.1016/j.combustflame.2015.11.004
[19]	HUANG Haozhong,LÜ Delin,ZHU Jizhen,et al. Development of a new reduced diesel/natural gas mechanism for dual-fuel engine combustion and emission prediction[J]. Fuel,2019,236: 30-42. doi: 10.1016/j.fuel.2018.08.161