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Slot film cooling performance in combustor with flame holders

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  • Song, Jiwoon
  • Lee, Keon Woo
  • Kim, Kyung Min
  • Cho, Hyung Hee

Abstract

This experimental study was conducted to investigate the effect of a flame holder on multi-slot film cooling in a ramjet combustor. A prediffuser-type ramjet combustor equipped with a flame holder was utilized in this study. The change in adiabatic film cooling effectiveness on the downstream wall was measured using thermochromic liquid crystals. Experiments were conducted using five different blowing ratios, ranging from 0.5 to 1.5. The effect of the flame holder on heat transfer shows different characteristics between the first and second slots. In the first slot, the accelerated flows by blockage effect suppress the ejected secondary flows resulting in better cooling performance in case with the flame holder. However, the second slot represents the low cooling performance over all the regions by the disturbed flows with the flame holder compared to that without the flame holder. And the difference in cooling performance is enlarged with the increase of blowing ratio. The results reveal that it is essential to consider the effect of a wake behind the flame holder. Therefore, it should be considered in the design of film cooling systems for a practical application in ramjet combustors.

Suggested Citation

  • Song, Jiwoon & Lee, Keon Woo & Kim, Kyung Min & Cho, Hyung Hee, 2012. "Slot film cooling performance in combustor with flame holders," Energy, Elsevier, vol. 37(1), pages 533-539.
    • Handle: RePEc:eee:energy:v:37:y:2012:i:1:p:533-539
    DOI: 10.1016/j.energy.2011.10.051
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    References listed on IDEAS

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    1. Kim, Kyung Min & Kim, Beom Seok & Lee, Dong Hyun & Moon, Hokyu & Cho, Hyung Hee, 2010. "Optimal design of transverse ribs in tubes for thermal performance enhancement," Energy, Elsevier, vol. 35(6), pages 2400-2406.
    2. Lee, Dong Hyun & Rhee, Dong-Ho & Kim, Kyung Min & Cho, Hyung Hee & Moon, Hee Koo, 2009. "Detailed measurement of heat/mass transfer with continuous and multiple V-shaped ribs in rectangular channel," Energy, Elsevier, vol. 34(11), pages 1770-1778.
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    Cited by:

    1. Shilong, Zhao & Yuxin, Fan, 2020. "Experimental and numerical study on the flame characteristics and cooling effectiveness of air-cooled flame holder," Energy, Elsevier, vol. 209(C).
    2. Zhang, Fan & Liu, Cunliang & Ye, Lin & Ran, Yuan & Zhou, Tianliang & Yan, Haonan, 2024. "Study on the film superposition method for dense multirow film Hole layouts," Energy, Elsevier, vol. 293(C).
    3. Zhang, Yueliang & Li, Jiangheng & Xie, Jin, 2022. "Effects of lateral cooling hole configuration on a swirl-stabilized combustor," Energy, Elsevier, vol. 259(C).

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