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Instantaneous monitoring of local fuel concentration in a liquid hydrocarbon-fueled flame using a LIBS plug

Author

Listed:
  • Kim, J.H.
  • Lee, S.H.
  • Do, H.
  • Yoh, J.J.

Abstract

A portable device composed of photodiodes and bandpass filters was developed to measure local fuel concentration in a liquid hydrocarbon-fueled spray flame. The plasma emission spectra in and around the flame were selectively captured using such simplified device or plug instead of using a laboratory standard laser-induced breakdown spectroscopy (LIBS) system consisting of an ICCD and a spectrometer. The hydrogen (656 nm) and oxygen (777 nm) atomic lines were selected to determine the fuel concentration in atmospheric pressure. The H/O signal intensity ratio was found to be a strong function of the fuel concentration, and thus a calibration curve for the concentration measurements was established and validated using conventional LIBS. The proposed scheme to measure the local equivalence ratio of spray flames using a bundled layout of multiple LIBS plugs alongside the combustor wall may offer simple and highly robust diagnostics, especially under the harsh combustion conditions within air-breathing engines.

Suggested Citation

  • Kim, J.H. & Lee, S.H. & Do, H. & Yoh, J.J., 2017. "Instantaneous monitoring of local fuel concentration in a liquid hydrocarbon-fueled flame using a LIBS plug," Energy, Elsevier, vol. 140(P1), pages 18-26.
    • Handle: RePEc:eee:energy:v:140:y:2017:i:p1:p:18-26
    DOI: 10.1016/j.energy.2017.08.081
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    Cited by:

    1. Jun, Hyung Min & Kim, John Hyunwoo & Lee, Seok Hwan & Yoh, Jack J., 2018. "Towards simplified monitoring of instantaneous fuel concentration in both liquid and gas fueled flames using a combustor injectable LIBS plug," Energy, Elsevier, vol. 160(C), pages 225-232.

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