Journal of Shanghai Jiao Tong University ›› 2022, Vol. 56 ›› Issue (5): 635-647.doi: 10.16183/j.cnki.jsjtu.2020.329

• Mechanical Engineering • Previous Articles     Next Articles

Large Eddy Simulation on Blow-Off Limit of Methane and Hydrogen-Mixed Gas

ZHOU Xirui1, WANG Ping1(), ZENG Haixiang1, ZHANG Yang1, PRASHANT Shrotriya2, ANTONIO Ferrante1,3, QI Haotian1   

  1. 1. Institute for Energy Research, Jiangsu University, Zhenjiang 212013, Jiangsu, China
    2. School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013,Jiangsu, China
    3. Centro Combustione Ambiente, Bali 70023, Italy
  • Received:2020-10-15 Online:2022-05-28 Published:2022-06-07
  • Contact: WANG Ping


The blow-off limits of methane and hydrogen-mixed gas on the Sydney inhomogeneous inflow jet burner were calculated and studied by large eddy simulation. The GRI 3.0 detailed reaction mechanism, 28-step and 19-step methane simplified reaction mechanisms were used to calculate the laminar premixed flames under the condition of different hydrogen-mixed fuel gases, which demonstrates the good performance of the 19-step simplified mechanism. A dynamic thickening flame combustion model was combined with the 19-step reaction mechanism to compute the Sydney partially premixed jet flame burner with a hydrogen-mixed gas (the volume ratio of V(H2):V(CH4):V(CO):V(CO2) = 0.2:0.2:0.27:0.33). The blow-off limits in FA and FJ layouts of hydrogen-mixed gas are 90 m/s and 109 m/s, while for pure methane flames are 74 m/s and 128 m/s, respectively. The difference of blow-off limits between the two fuels is related to the inhomogeneity of fuel and air mixing in different layouts. This study shows that the combustion stability can be improved by optimizing the inlet layout and mixing process of fuel gas and air.

Key words: partially premixed flame, blow-off limit, hydrogen-mixed gas, thickened flame model, large eddy simulation

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