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Primary air entrainment characteristics for a self-aspirating burner: Model and experiments

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  • Namkhat, A.
  • Jugjai, S.

Abstract

Experimental and theoretical investigations of primary air entrainment characteristics of a self-aspirating burner are presented. Emphasis was made on experiments, which were performed using both hot and cold tests; and a correlation between them is proposed. The level of primary air entrainment is measured using an oxygen sensor and a particle image velocimetry system. Experimental results are used to validate the predicted ones, which are obtained by constructing a theoretical model basing on simple momentum and energy conservation principles. It is found that the model predictions agree with the experimental data for a similar system. Primary air entrainment is a function of fuel gas flow rate, fuel gas type, injector geometry, mixing tube geometry, and burner port geometry. The level of primary air entrainment increases with increasing momentum rate of the fuel gas. The hot test gives about a 22 percentage point (37% relative) lower PA value than that of the cold test because of the preheating effect caused by combustion. A first correlation between the hot test and the cold one for primary air entrainment is proposed. It is recommended that the preheating effect caused by combustion in a self-aspirating burner not be neglected when designing the burner.

Suggested Citation

  • Namkhat, A. & Jugjai, S., 2010. "Primary air entrainment characteristics for a self-aspirating burner: Model and experiments," Energy, Elsevier, vol. 35(4), pages 1701-1708.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:4:p:1701-1708
    DOI: 10.1016/j.energy.2009.12.020
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    Cited by:

    1. Roberto Moreno-Soriano & Froylan Soriano-Moranchel & Luis Armando Flores-Herrera & Juan Manuel Sandoval-Pineda & Rosa de Guadalupe González-Huerta, 2020. "Thermal Efficiency of Oxyhydrogen Gas Burner," Energies, MDPI, vol. 13(20), pages 1-11, October.
    2. Sun, Mengxiao & Huang, Xiaomei & Hu, Yelong & Lyu, Shan, 2022. "Effects on the performance of domestic gas appliances operated on natural gas mixed with hydrogen," Energy, Elsevier, vol. 244(PA).
    3. Sutar, Kailasnath B. & M.R., Ravi & Kohli, Sangeeta, 2016. "Design of a partially aerated naturally aspirated burner for producer gas," Energy, Elsevier, vol. 116(P1), pages 773-785.
    4. Saberi Moghaddam, Mohammad Hossein & Saei Moghaddam, Mojtaba & Khorramdel, Mohammad, 2017. "Numerical study of geometric parameters effecting temperature and thermal efficiency in a premix multi-hole flat flame burner," Energy, Elsevier, vol. 125(C), pages 654-662.
    5. Yu, Byeonghun & Kum, Sung-Min & Lee, Chang-Eon & Lee, Seungro, 2013. "Combustion characteristics and thermal efficiency for premixed porous-media types of burners," Energy, Elsevier, vol. 53(C), pages 343-350.
    6. Lee, Seungro & Kum, Sung-Min & Lee, Chang-Eon, 2011. "An experimental study of a cylindrical multi-hole premixed burner for the development of a condensing gas boiler," Energy, Elsevier, vol. 36(7), pages 4150-4157.
    7. Kuntikana, Pramod & Prabhu, S.V., 2017. "Thermal investigations on methane-air premixed flame jets of multi-port burners," Energy, Elsevier, vol. 123(C), pages 218-228.
    8. Yoksenakul, W. & Jugjai, S., 2011. "Design and development of a SPMB (self-aspirating, porous medium burner) with a submerged flame," Energy, Elsevier, vol. 36(5), pages 3092-3100.

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