Effect of Hydrogen Content of CH4-H2 Mixture on Structure of Turbulent Diffusion Flame Under MILD Condition

doi:10.12068/j.issn.1005-3026.2017.08.018

Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (8): 1148-1153.DOI: 10.12068/j.issn.1005-3026.2017.08.018

• Mechanical Engineering • Previous Articles Next Articles

Effect of Hydrogen Content of CH₄-H₂ Mixture on Structure of Turbulent Diffusion Flame Under MILD Condition

XIE Yi¹， ZHONG Chen¹， TAN Chuan-zhi²， LIU Xiao-bing²

1. School of Automotive Engineering， Chongqing University， Chongqing 400044， China; 2. Chongqing Chang’an Automobile Co.， LTD， Chongqing 400023， China.

Received:2016-01-20 Revised:2016-01-20 Online:2017-08-15 Published:2017-08-12
Contact: XIE Yi
About author:-
Supported by:
-

Abstract

Abstract: MILD combustion in the second stage of JHC experiment was simulated by using two-dimensional axisymmetric numerical simulation method. The influence of hydrogen content of CH₄-H₂ mixture on the turbulent diffusion flame was studied under the condition of constant volume flux of fuel mixture. The results show that the mixing between fuel and oxidant augments， the velocity magnitude and its radial component falls down with the increase of hydrogen content of fuel mixture. In addition， as the hydrogen content of fuel mixture goes up， the flame front gradually leans to the oxidant side and the max mass fraction of OH free radical goes up firstly and then goes down. As for the combustion temperature， although the combustion temperature in the main exothermic reaction zone increases with increasing the hydrogen content of fuel mixture， the influence of hydrogen content on the temperature is very small when it is over 20%.

Key words: MILD combustion, hydrogen content of fuel mixture, velocity distribution, temperature distribution, distribution of OH free radical

CLC Number:

TK432

XIE Yi， ZHONG Chen， TAN Chuan-zhi， LIU Xiao-bing. Effect of Hydrogen Content of CH₄-H₂ Mixture on Structure of Turbulent Diffusion Flame Under MILD Condition[J]. Journal of Northeastern University Natural Science, 2017, 38(8): 1148-1153.

References

[1]Cavaliere A，Joannon M D.MILD combustion［J］.Progress in Energy and Combustion Science，2004，30(3):329-366.
[2]李鹏飞，米建春，Dally B B，等.MILD燃烧的最新进展和发展趋势［J］.中国科学:技术科学，2011，41(2):135-149.(Li Peng-fei，Mi Jian-chun，Dally B B，et al.Progress and recent trend in MILD combustion［J］.Scientia Sinica Technologica，2011，41(2):135-149.)
[3]Plessing T，Peters N，Wünning J G.Laser optical investigation of highly preheated combustion with strong exhaust gas recirculation［J］.Proceedings of the Combustion Institute，1998，27(2):3197-3204.
[4]Tsuji H，Gupta A K，Hasegawa T，et al.High temperature air combustion:from energy conservation to pollution reduction［M］.Boca Raton:CRC Press，2003.
[5]李鹏飞，米建春，Dally B B，等.当量比和反应物混合模式对无焰燃烧的影响［J］.中国电机工程学报，2011，31(5):20-27.(Li Peng-fei，Mi Jian-chun，Dally B B，et al.Effects of equivalence ratio and mixing pattern of reactants on flameless combustion［J］.Proceedings of the CSEE，2011，31(5):20-27.)
[6]Mi J C，Li P F，Dally B B，et al.Importance of initial momentum rate and air-fuel premixing on moderate or intense low oxygen dilution (MILD) combustion in a recuperative furnace［J］.Energy & Fuels，2009，23(11):5349-5356.
[7]Li P F，Mi J C.Critical Reynolds numbers for realization of MILD combustion in a recuperative furnace［C］//The 8th International Symposium on High Temperature Air Combustion and Casification.Poznan，Poland，2010.
[8]Yu Y，Wang G F，Lin Q Z，et al.Flameless combustion for hydrogen containing fuels［J］.International Journal of Hydrogen Energy，2010，35(7):2694-2697.
[9]Sabia P，Joannon M，Fierro S，et al.Hydrogen-enriched methane MILD combustion in a well stirred reactor［J］.Experimental Thermal and Fluid Science，2007，31(5):469-475.
[10]Dally B B，Karpetis A N，Barlow R S.Structure of turbulent non-premixed jet flames in a diluted hot coflow［J］.Proceedings of the Combustion Institute，2002，29(1):1147-1154.
[11]Christo F C，Dally B B．Modeling turbulent reacting jets issuing into a hot and diluted coflow［J］.Combustion and Flame，2005，142(1/2):117-129．
[12]Mardani A，Tabejamaat S，Ghamari M．Numerical study of influence of molecular diffusion in the MILD combustion regime［J］.Combustion Theory and Modeling，2010，14(5):747-774.
[13]Smith G P，Golden D M，Frenklach M，et al.GRI-Mech 3.0［EB/OL］.［2015-10-28］.http://www.me.berkeley.edu/gri_mech/.

Effect of Hydrogen Content of CH₄-H₂ Mixture on Structure of Turbulent Diffusion Flame Under MILD Condition

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 10

Recommended Articles

Metrics

Comments

[1]	YU Hong-wen， AN Long， LI Yuan-hui， GAO Chuan-bo. Effect of Microwave Radiation on Pore Structure and Tensile Strength of Metagranulite [J]. Journal of Northeastern University(Natural Science), 2021, 42(10): 1451-1458.
[2]	LIU Bin， MAO Jun， LI Gui-qiang， XI Yan-hong. Influence of Moving Vehicles on Temperature Distribution of Tunnel Fire Ceiling Jet [J]. Journal of Northeastern University Natural Science, 2020, 41(5): 655-661.
[3]	GUO Xu-huan， ZHANG Zi-mu， ZHAO Qiu-yue， ZHANG Ting-an. Numerical Simulation of Liquid Phase Flow in a Self-Stirring Reactor [J]. Journal of Northeastern University Natural Science, 2018, 39(3): 357-362.
[4]	XIE Yi， ZHONG Chen， RUAN Deng-fang， LIU Kun. Combustion Characteristics of Micro-lobed Burner [J]. Journal of Northeastern University Natural Science, 2017, 38(4): 536-541.
[5]	FENG Mingjie， LI Deli， WANG Engang. Numerical Simulation of An Adjustable Length of Flame Gas Burner [J]. Journal of Northeastern University Natural Science, 2014, 35(9): 1279-1282.
[6]	XIE Qian， HU Xiao， WANG Zhaodong， WANG Guodong. Exit Velocity Uniformity of Water Supply Pipe and Nozzle Manifolds in Advanced Cooling System [J]. Journal of Northeastern University Natural Science, 2014, 35(8): 1137-1140.
[7]	CUI Baoyu， WEI Dezhou， ZHAI Qingxiang， ZHANG Siyao. Numerical Study on Internal Flow Field of Hydrocyclone [J]. Journal of Northeastern University Natural Science, 2014, 35(6): 894-897.
[8]	JIA Pinfeng， HE Lizi， ZHANG Haitao， CUI Jianzhong. Temperature Distribution of 7050 Alloy During Homogenization with Current [J]. Journal of Northeastern University Natural Science, 2014, 35(10): 1417-1421.
[9]	FENG Mingjie， WANG Engang， HE Jicheng. Numerical Simulation on Combustion Performance of a New Type Combustor for Baking Furnace [J]. Journal of Northeastern University, 2013, 34(3): 360-363.
[10]	WANG Aihua， LI Liya. Temperature Distribution of SiO2 Trench Wafer in Rapid Thermal Process [J]. Journal of Northeastern University, 2013, 34(2): 248-250.