Experimental study on the laminar flame speed of hydrogen/natural gas/air mixtures

doi:10.1007/s11705-010-0515-8

Front Chem Eng Chin

2010, Vol. 4

Issue (4) : 417-422 https://doi.org/10.1007/s11705-010-0515-8

RESEARCH ARTICLE

Experimental study on the laminar flame speed of hydrogen/natural gas/air mixtures

Chen DONG, Qulan ZHOU(

), Xiaoguang ZHANG, Qinxin ZHAO, Tongmo XU, Shi’en HUI

State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China

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Abstract

Laminar flame speeds of hydrogen/natural gas/air mixtures have been measured over a full range of fuel compositions (0–100% volumetric fraction of H₂) and a wide range of equivalence ratio using Bunsen burner. High sensitivity scientific CCD camera is use to capture the image of laminar flame. The reaction zone area is employed to calculate the laminar flame speed. The initial temperature and pressure of fuel air mixtures are 293 K and 1 atm. The laminar flame speeds of hydrogen/air mixture and natural gas/air mixture reach their maximum values 2.933 and 0.374 m/s when equivalence ratios equal to 1.7 and 1.1, respectively. The laminar flame speeds of hydrogen/natural gas/air mixtures rise with the increase of volumetric fraction of hydrogen. Moreover, the increase in laminar flame speed as the volumetric fraction of hydrogen increases presents an exponential increasing trend versus volumetric fraction of hydrogen. Empirical formulas to calculate the laminar flame speeds of hydrogen, natural gas, and hydrogen/natural gas mixtures are also given. Using these formulas, the laminar flame speed at different hydrogen fractions and equivalence ratios can be calculated.

Keywords laminar flame speed experimental study Bunsen flame

Corresponding Author(s): ZHOU Qulan,Email:qlzhou@mail.xjtu.edu.cn

Issue Date: 05 December 2010

Cite this article:

Chen DONG,Qulan ZHOU,Xiaoguang ZHANG, et al. Experimental study on the laminar flame speed of hydrogen/natural gas/air mixtures[J]. Front Chem Eng Chin, 2010, 4(4): 417-422.

URL:

https://academic.hep.com.cn/fcse/EN/10.1007/s11705-010-0515-8
https://academic.hep.com.cn/fcse/EN/Y2010/V4/I4/417

Fig.1 Schematic of the experiment setup (MFM= mass flow meter)

Fig.2 Laminar flame speed of H/air versus equivalence ratio

Fig.3 Laminar flame speed of NG/air versus equivalence ratio

Fig.4 Laminar flame speeds of H/NG/air mixtures versus equivalence ratio

Fig.5 Fitting curve of laminar flame speed versus equivalence ratio for H

Fig.6 Fitting curve of laminar flame speed versus equivalence ratio for NG

Fig.7 Laminar flame speed increment versus H fraction at different equivalence ratios

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