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An Investigation on Flame Shape and Size for a High-Pressure Turbulent Non-Premixed Swirl Combustion

Author

Listed:
  • Zhongya Xi

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Zhongguang Fu

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Xiaotian Hu

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Syed Waqas Sabir

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

  • Yibo Jiang

    (National Thermal Power Engineering & Technology Research Center, North China Electric Power University, Beijing 102206, China)

Abstract

Flame shape and size for a high-pressure turbulent non-premixed swirl combustion were experimentally investigated over a wide range of varying parameters including fuel mass flow rate, combustor pressure, primary-air mass flow rate, and nozzle exit velocity. A CFD simulation was conducted to predict the flame profile. Meanwhile, a theoretical calculation was also performed to estimate flame length. It was observed that flame length increased linearly with increasing fuel mass flow rate but decreased with the increment of combustor pressure in the power function. The flame diminished at a larger primary-air mass flow rate but remained unaffected by the increasing nozzle exit velocity. Considering the global effect of all parameters at a particular pressure, the flame length generally decreased as the primary-air to fuel ratio increased. This was attributed to the reduced air entrainment required to dilute the fuel to stoichiometric proportions. The CFD simulation offered a good prediction of the variation trends of flame length, although some deviations from experimental values were observed. The theoretical calculation estimated the trends of flame length variation particularly well. Nevertheless the difference between the theoretical and experimental results was found to be due to the swirl influence. Hence, a swirl factor was proposed to be added to the original equation for swirl flames.

Suggested Citation

  • Zhongya Xi & Zhongguang Fu & Xiaotian Hu & Syed Waqas Sabir & Yibo Jiang, 2018. "An Investigation on Flame Shape and Size for a High-Pressure Turbulent Non-Premixed Swirl Combustion," Energies, MDPI, vol. 11(4), pages 1-20, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:4:p:930-:d:141018
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    References listed on IDEAS

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    1. Maria Grazia De Giorgi & Aldebara Sciolti & Stefano Campilongo & Antonio Ficarella, 2017. "Flame Structure and Chemiluminescence Emissions of Inverse Diffusion Flames under Sinusoidally Driven Plasma Discharges," Energies, MDPI, vol. 10(3), pages 1-15, March.
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    Cited by:

    1. Mehdi Bidabadi & Peyman Ghashghaei Nejad & Hamed Rasam & Sadegh Sadeghi & Bahman Shabani, 2018. "Mathematical Modeling of Non-Premixed Laminar Flow Flames Fed with Biofuel in Counter-Flow Arrangement Considering Porosity and Thermophoresis Effects: An Asymptotic Approach," Energies, MDPI, vol. 11(11), pages 1-25, October.
    2. Kai Xie & Yunjing Cui & Xingqi Qiu & Jianxin Wang, 2019. "Combustion Characteristics of Horizontal Diesel Spray Burner in Low-Pressure Chamber Based on Multivariate Correlation Analysis," Complexity, Hindawi, vol. 2019, pages 1-11, November.

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