Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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An Effect of Pressure Fluctuations of a Combustion Chamber on the Modulation of Equivalence Ratio in the Channel of the Burner

연소실 압력 변동이 버너내부의 당량비 변조에 미치는 영향

  • 홍정구 (한국과학기술원 대학원 기계공학과) ;
  • 오광철 (자동차부품연구원 환경부품연구센터) ;
  • 신현동 (한국과학기술원 기계공학과)
  • Published : 2007.02.01
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Abstract

In order to understand the phenomena of combustion instability, an experimental study was conducted at the moderate pressure and ambient temperature conditions. The flame behavior and the pressure fluctuations were measured in a dump combustor. Various types of combustion modes occurred in accordance with the equivalence ratio and the fuel supplying conditions. The fluctuation of pressure, heat release and equivalence ratio were measured by piezoelectric pressure sensor, high speed Intensified Charge Coupled Device (HICCD) camera and gas chromatography respectively. Two representative modes were self-excited pressure oscillations at the resonance of combustion chamber (200Hz) and instabilities related to the modulated fuel flow rate through the fuel holes (10Hz). It is found that, especially in an unchoked fuel flow condition, the modulation of the fuel flow rate affects the characteristics of flame behavior and pressure fluctuations in a lean premixed flame.

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References

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  1. Experimental Study on the Effect of Flame Surface Area Fluctuation on the Heat Release Fluctuation in a Premixed Bunsen Flame vol.34, pp.2, 2010, https://doi.org/10.3795/KSME-B.2010.34.2.197