Research on Equivalent Effects of Dilution Ratio and Temperature on Premixed Combustion of Natural Gas

HAN Zhi-qiang;QIAN Yun-shou;TIAN Wei;XIA Qi

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2018, Vol. 39 ›› Issue (5) : 998-1005. DOI: 10.3969/j.issn.1000-1093.2018.05.021
Paper

Research on Equivalent Effects of Dilution Ratio and Temperature on Premixed Combustion of Natural Gas

  • HAN Zhi-qiang1， QIAN Yun-shou1， TIAN Wei1， XIA Qi2
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Abstract

The equivalent effects of initial temperature and dilution ratio on premixed combustion of natural gas in the constant volume combustion bomb are studied. The initial pressure pu and equivalence ratio  are set to be 0.3 MPa and 1.0 in experiment, respectively, and the ball type flame extension method by high speed schlieren photography is used in the experiment. Stretched flame propagation velocity Sn, unstretched flame propagation velocity SL, Markstein length Lb, laminar combustion velocity uL and NOx emission are analyzed in detail. The results show that SL, flame development duration and combustion duration are nearly identical, but the laminar burning velocity uL has a big difference at the operating points that have similar Sn value. The influence of dilution ratio on SL and uL is greater than that of initial temperature when the dilution ratio is small. Further research finds that the temperature difference ΔTu= 50 K has equivalent effect on combustion process compared with dilution ratio ΔDR=2%. Under the boundary conditions of the similar Sn, the NOx emission is lower under the conditions of higher initial temperature and dilution ratio compared with the smaller initial temperature and dilution ratio. Key

Key words

naturalgas / premixedcombustion / dilutionratio / couplingeffect / equivalenteffect

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HAN Zhi-qiang， QIAN Yun-shou， TIAN Wei， XIA Qi. Research on Equivalent Effects of Dilution Ratio and Temperature on Premixed Combustion of Natural Gas. Acta Armamentarii. 2018, 39(5): 998-1005 https://doi.org/10.3969/j.issn.1000-1093.2018.05.021

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第39卷
第5期2018年5月兵工学报ACTA
ARMAMENTARIIVol.39No.5May2018

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