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Visualization of flashback in a premixed burner with swirling flow

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Abstract

In this study, the measurement object is a flame propagating in a premixed burner with swirling flow in order to investigate unsteady flame behavior in a gas turbine premixer. During flashback, the flame propagating upstream was visualized with a high-speed camera. Moreover, we established the technique to measure the instantaneous flow fields of unburned fuel-air mixture in a swirling premixed burner using particle image velocimetry (PIV). As a result, the characteristics of flame behavior propagating upstream were examined. And it was found that a low velocity region existed in the vicinity of the flame tip. The relationship between low velocity region and flame behavior was discussed in detail.

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Abbreviations

D :

inner diameter of cylindrical glass (mm)

L :

length of cylindrical glass (mm)

Q air :

air flow rate (NL/min)

Q fuel :

fuel flow rate (NL/min)

S :

swirl number

S u :

burning velocity (m/s)

V f :

flame speed (m/s)

V y :

axial velocity component (m/s)

V ϑmax :

maximum tangential velocity component (m/s)

x :

radial direction in a burner

y :

axial direction in a burner

α :

exit angle of the swirler (degree)

λ :

air ratio

ρ b :

burned gas density

ρ u :

unburned gas density

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Authors and Affiliations

  1. Mitsubishi Heavy Industries, Ltd., 2-1-1, Shinhama, Arai-cho, Takasago, Hyogo, 676-0871, Japan

    Satoshi Tanimura

  2. Department of Mechanical Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565-0871, Japan

    Masaharu Komiyama, Kenichiro Takeishi, Yuji Iwasaki & Kiyonobu Nakayama

Authors
  1. Satoshi Tanimura
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  2. Masaharu Komiyama
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  3. Kenichiro Takeishi
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  4. Yuji Iwasaki
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  5. Kiyonobu Nakayama
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Corresponding author

Correspondence to Masaharu Komiyama.

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Tanimura, S., Komiyama, M., Takeishi, K. et al. Visualization of flashback in a premixed burner with swirling flow. Sci. China Ser. E-Technol. Sci. 53, 40–45 (2010). https://doi.org/10.1007/s11431-010-0019-2

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  • DOI: https://doi.org/10.1007/s11431-010-0019-2

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