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A comparative study on the turbulent explosion characteristics of syngas between CO-enriched and H2-enriched

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  • Sun, Z.Y.
  • LIU, Shao-Yan

Abstract

Syngas, containing mostly CO and H2, has variant explosion properties for the specific contents. For a further understanding, a comparative study on the turbulent explosion characteristics of syngas between CO-enriched (the mole ratio of CO was 70%) and H2-enriched (the mole ratio of H2 was 70%) were conducted at different equivalence ratios (φ, from 0.4 to 3.0) and turbulent intensities (u'rms, from 0 to 1.309 m/s). The peak value of maximum explosion pressure (pmax) was attained in the stoichiometric explosion of H2-enriched syngas but in fuel-rich explosion of the CO-enriched, the growth extents of pmax seemed more sensitive to u'rms for H2-enriched syngas compared to CO-enriched syngas. The lowest values of explosion duration (tc) was attained in fuel-rich explosions for both CO-enriched and H2-enriched syngas but different corresponding φ to the lowest tc, the phenomena were analyzed from the aspects of ignition delay time, laminar burning velocity, intrinsic instabilities, and flame/turbulence interaction. Finally, the pressure rising was comparatively observed, the maximum pressure rise rate ((dp/dt)max) expressed more similar variation regulations to tc rather than pmax, which meant flame propagation speed plays a more important role on the evolution of pressure rising.

Suggested Citation

  • Sun, Z.Y. & LIU, Shao-Yan, 2022. "A comparative study on the turbulent explosion characteristics of syngas between CO-enriched and H2-enriched," Energy, Elsevier, vol. 241(C).
    • Handle: RePEc:eee:energy:v:241:y:2022:i:c:s036054422103190x
    DOI: 10.1016/j.energy.2021.122941
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    References listed on IDEAS

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    2. Liang, He & Yan, Xingqing & Shi, Enhua & Wang, Xinfei & Qi, Chang & Ding, Jianfei & Zhang, Lianzhuo & Chen, Lei & Lv, Xianshu & Yu, Jianliang, 2024. "Effect of hydrogen blending on ammonia/air explosion characteristics under wide equivalence ratio," Energy, Elsevier, vol. 297(C).
    3. Qi, Beibei & Li, Haitao & Zhai, Fuer & Yu, Minggao & Wei, Chengcai, 2024. "Experimental and numerical study on the explosion characteristics of syngas under different venting conditions," Energy, Elsevier, vol. 290(C).
    4. Chang, Ke & Ji, Changwei & Wang, Shuofeng & Yang, Jinxin & Wang, Huaiyu & Meng, Hao & Liu, Dianqing, 2023. "Numerical investigation of the synchronous and asynchronous changes of ignition timing in a double spark plugs direct injection rotary engine," Energy, Elsevier, vol. 268(C).

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