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Improvement of lean flame stability of inverse methane/air diffusion flame by using coaxial dielectric plasma discharge actuators

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  • De Giorgi, Maria Grazia
  • Ficarella, Antonio
  • Sciolti, Aldebara
  • Pescini, Elisa
  • Campilongo, Stefano
  • Di Lecce, Giorgio

Abstract

Low environmental impact is a main issue in the design of novel combustion systems, as aircraft engines. In this context, the present work investigates the possibility to increase the combustion efficiency of a lean flame through the use of sinusoidally driven dielectric barrier discharge (DBD) plasma actuator. The effect of the plasma discharge on a lean non premixed methane/air flame in a Bunsen-type burner has been studied for two different configurations: the normal diffusive flame (NDF) and the inverse diffusive flame (IDF). The flame behavior was investigated by chemiluminescence imaging through an intensified CCD camera. Optical filters were installed in front of the camera, aiming to selectively record signal from the chemiluminescent species OH*, CH*, or CO2*. This allowed evaluating the changes occurring in presence of plasma actuation in term of flame emissions. It was shown that the plasma effects are significantly influenced by the burner and DBD configuration. A plasma power of approximately 25 W permitted to increase the air mass flow rate at which lean blowout appears; it rose up to 30% for low methane flow rate and up to 10% at high fuel flow rate.

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  • De Giorgi, Maria Grazia & Ficarella, Antonio & Sciolti, Aldebara & Pescini, Elisa & Campilongo, Stefano & Di Lecce, Giorgio, 2017. "Improvement of lean flame stability of inverse methane/air diffusion flame by using coaxial dielectric plasma discharge actuators," Energy, Elsevier, vol. 126(C), pages 689-706.
    • Handle: RePEc:eee:energy:v:126:y:2017:i:c:p:689-706
    DOI: 10.1016/j.energy.2017.03.048
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    Cited by:

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    3. Kapusta, Łukasz Jan & Shuang, Chen & Aldén, Marcus & Li, Zhongshan, 2020. "Structures of inverse jet flames stabilized on a coaxial burner," Energy, Elsevier, vol. 193(C).
    4. Said, Syed A. & Aliyu, Mansur & Nemitallah, Medhat A. & Habib, Mohamed A. & Mansir, Ibrahim B., 2018. "Experimental investigation of the stability of a turbulent diffusion flame in a gas turbine combustor," Energy, Elsevier, vol. 157(C), pages 904-913.
    5. Yan, Shuai & Gong, Yan & Duan, Zhengqiao & Guo, Qinghua & Yu, Guangsuo, 2023. "Investigation of the correlation between OH*, CH* chemiluminescence and heat release rate in methane inverse diffusion flame," Energy, Elsevier, vol. 283(C).
    6. Li, Yueh-Heng & Chen, Chih-Ting & Fang, Hui-Kuan, 2019. "Effects of a microwave-induced corona discharge plasma on premixed methane-air flames," Energy, Elsevier, vol. 188(C).
    7. Zare, Saeid & Lo, Hao Wei & Roy, Shrabanti & Askari, Omid, 2020. "On the low-temperature plasma discharge in methane/air diffusion flames," Energy, Elsevier, vol. 197(C).

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