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Experimental Study of Hydrogen Addition Effects on a Swirl-Stabilized Methane-Air Flame

Author

Listed:
  • Mao Li

    (Department of Energy Sciences, Lund University, Ole Römers väg 1, SE-22100 Lund, Sweden)

  • Yiheng Tong

    (Department of Energy Sciences, Lund University, Ole Römers väg 1, SE-22100 Lund, Sweden)

  • Jens Klingmann

    (Department of Energy Sciences, Lund University, Ole Römers väg 1, SE-22100 Lund, Sweden)

  • Marcus Thern

    (Department of Energy Sciences, Lund University, Ole Römers väg 1, SE-22100 Lund, Sweden)

Abstract

The effects of H 2 addition on a premixed methane-air flame was studied experimentally with a swirl-stabilized gas turbine model combustor. Experiments with 0%, 25%, and 50% H 2 molar fraction in the fuel mixture were conducted under atmospheric pressure. The primary objectives are to study the impacts of H 2 addition on flame lean blowout (LBO) limits, flame shapes and anchored locations, flow field characteristics, precessing vortex core (PVC) instability, as well as the CO emission performance. The flame LBO limits were identified by gradually reducing the equivalence ratio until the condition where the flame physically disappeared. The time-averaged CH chemiluminescence was used to reveal the characteristics of flame stabilization, e.g., flame structure and stabilized locations. In addition, the inverse Abel transform was applied to the time-averaged CH results so that the distribution of CH signal on the symmetric plane of the flame was obtained. The particle image velocimetry (PIV) was used to detect the characteristics of the flow field with a frequency of 2 kHz. The snapshot method of POD (proper orthogonal decomposition) and fast Fourier transform (FFT) were adopted to capture the most prominent coherent structures in the turbulent flow field. CO emission was monitored with an exhaust probe that was installed close to the combustor exit. The experimental results indicated that the H 2 addition extended the flame LBO limits and the operation range of low CO emission. The influence of H 2 addition on the flame shape, location, and flow field was observed. With the assistance of POD and FFT, the combustion suppression impacts on PVC was found.

Suggested Citation

  • Mao Li & Yiheng Tong & Jens Klingmann & Marcus Thern, 2017. "Experimental Study of Hydrogen Addition Effects on a Swirl-Stabilized Methane-Air Flame," Energies, MDPI, vol. 10(11), pages 1-18, November.
  • Handle: RePEc:gam:jeners:v:10:y:2017:i:11:p:1769-:d:117497
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    Citations

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    Cited by:

    1. Abubakar, Zubairu & Shakeel, Mohammad Raghib & Mokheimer, Esmail M.A., 2018. "Experimental and numerical analysis of non-premixed oxy-combustion of hydrogen-enriched propane in a swirl stabilized combustor," Energy, Elsevier, vol. 165(PB), pages 1401-1414.
    2. Zhongya Xi & Zhongguang Fu & Xiaotian Hu & Syed Waqas Sabir & Yibo Jiang, 2018. "An Experimental Investigation on the NO and CO Emission Characteristics of a Swirl Convergent-Divergent Nozzle at Elevated Pressure," Energies, MDPI, vol. 11(6), pages 1-18, May.

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