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Combustion characteristics of ignition processes for lean premixed swirling combustor under visual conditions

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  • Shen, Wenkai
  • Liu, Li
  • Hu, Qiming
  • Liu, Guichuang
  • Wang, Jiwei
  • Zhang, Ning
  • Wu, Shaohua
  • Qiu, Penghua
  • Song, Shaowei

Abstract

The combustion characteristics of ignition processes under different ignition fuel ratios were studied on a natural gas-fueled micro gas turbine combustion chamber. With the changing of air mass flow, the equivalence ratio varied from 0.024 to 0.994 at which the fuel mass flow remained the same. The flue gas compositions were measured at the combustion chamber outlet, and used to calculate the combustion efficiency. To characterize the relative flame stability, optical measurements and digital image processing techniques were applied. The results indicate that the combustor can ignite successfully under the ignition fuel ratio conditions of 10%, 15%, and 20%, in which the corresponding equivalence ratios are 0.082–0.497, 0.082–0.746, and 0.098–0.994, respectively. Moreover, the combustion efficiency decreased with the descending equivalence ratio. However, the amount of CO and unburned CH4 in the combustion products increased as the equivalence ratio decreased. The heat release rate in the reaction zone and the morphological characteristics of the flame were obtained using the gray level of average flame images. Furthermore, the flame fluctuation was analyzed by coefficient of variation of the flame area, and the relative flame stability was analyzed by the probability distribution density of the relative flame area ratio. The appropriate equivalence ratios for ignition are around 0.245, 0.243–0.369, and 0.196–0.326 under the ignition fuel ratio conditions of 10%, 15%, and 20%. The ignition fuel ratio has considerable influence on combustion efficiency, combustion product, and flame stability.

Suggested Citation

  • Shen, Wenkai & Liu, Li & Hu, Qiming & Liu, Guichuang & Wang, Jiwei & Zhang, Ning & Wu, Shaohua & Qiu, Penghua & Song, Shaowei, 2021. "Combustion characteristics of ignition processes for lean premixed swirling combustor under visual conditions," Energy, Elsevier, vol. 218(C).
    • Handle: RePEc:eee:energy:v:218:y:2021:i:c:s0360544220326281
    DOI: 10.1016/j.energy.2020.119521
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    References listed on IDEAS

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    Cited by:

    1. Zong, Chao & Ji, Chenzhen & Cheng, Jiaying & Zhu, Tong & Guo, Desan & Li, Chengqin & Duan, Fei, 2022. "Toward off-design loads: Investigations on combustion and emissions characteristics of a micro gas turbine combustor by external combustion-air adjustments," Energy, Elsevier, vol. 253(C).
    2. Shen, Wenkai & Xing, Chang & Liu, Haiqing & Liu, Li & Hu, Qiming & Wu, Guohua & Yang, Yujia & Wu, Shaohua & Qiu, Penghua, 2022. "Exhaust gas recirculation effects on flame heat release rate distribution and dynamic characteristics in a micro gas turbine," Energy, Elsevier, vol. 249(C).
    3. Guo, Kaifang & Sun, Dechuan & Zeng, Zhuoxiong, 2023. "Numerical study of ignition process in vortex cold wall combustion chamber," Energy, Elsevier, vol. 262(PA).
    4. Bolegenova, Saltanat & Askarova, Аliya & Georgiev, Aleksandar & Nugymanova, Aizhan & Maximov, Valeriy & Bolegenova, Symbat & Mamedov, Bolat, 2023. "The use of plasma technologies to optimize fuel combustion processes and reduce emissions of harmful substances," Energy, Elsevier, vol. 277(C).
    5. Park, Yeseul & Choi, Minsung & Choi, Gyungmin, 2022. "Fault detection of industrial large-scale gas turbine for fuel distribution characteristics in start-up procedure using artificial neural network method," Energy, Elsevier, vol. 251(C).

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