Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지
DOI QR코드

DOI QR Code

Development of LIBS Plug for Combustor Diagnosis

연소실 진단을 위한 LIBS 소형화 장비 개발

  • Jun, Hyung Min (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Hyunwoo (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Yoh, Jai-ick (Department of Mechanical and Aerospace Engineering, Seoul National University)
  • Received : 2018.06.07
  • Accepted : 2019.02.11
  • Published : 2019.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

LIBS plug, a simplified laser-induced breakdown spectroscopy(LIBS) device with the purpose of measuring the fuel distribution inside the combustion chamber, was developed and manufactured. The LIBS plug receives only two wavelengths (H:656.3 nm, O: 777 nm) that are closely related to the equivalence ratio in the overall spectrum. The calibration curve between the signal of the LIBS plug and the equivalence ratio was constructed, and the fuel distribution of gasoline-air and LPG-air mixtures was measured using the LIBS plug.

연소실 내부의 연료 분포를 실시간으로 측정하는 목적을 가진 소형화 장비인 LIBS plug가 개발 및 제작 되었다. LIBS plug는 레이저 유도 플라즈마 분광분석법 (Laser-induced breakdown spectroscopy : LIBS)를 응용한 장비로, 기존의 LIBS 결과인 전체 스펙트럼에서 당량비와 깊게 관여하는 두 개의 파장(H: 656.3 nm, O: 777 nm)만을 선정하여 측정할 수 있도록 하였다. 렌즈와 밴드패스 필터, 포토다이오드로 구성된 본 장비로 수집한 결과에 대한 분석이 이루어졌으며, 액체(가솔린)와 기체(LPG) 연료와 공기의 혼합물에서의 당량비 측정이 이루어졌다.

Keywords

References

  1. Tavoularis, S., Measurement in Fluid Mechanics, Cambridge University Press, New York, N.Y., U.S.A., 2005.
  2. Pitz, R.W., Grady, N.R., Shopoff, S.W., Hu, S. and Carter, C.D., "UV Raman scattering measurements of a Mach 2 reacting flow over a piloted cavity," 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, N.V., U.S.A., AIAA 2008-244, Jan. 2008.
  3. Gruber, M.R., Baurle, R.A., Mathur, T. and Hsy, K.Y., “Fundamental studies of cavity-based flameholder concepts for supersonic combustors,” Journal of Propulsion and Power, Vol. 17, No. 1, pp. 146-153, 2001. https://doi.org/10.2514/2.5720
  4. Stavropoulos, P., Michalakou, A., Skevis, G. and Couris, S., “Quantitative local equivalence ratio determination in laminar premixed methane-air flames by laser induced breakdown spectroscopy (LIBS),” Chemical Physics Letters, Vol. 404, No. 4, pp. 309-314, 2005. https://doi.org/10.1016/j.cplett.2005.01.105
  5. Keifer, J., Troger, J.W., Li, S. and Alden, M., “Laser-induced plasma in methane and dimethyl ether for flame ignition and combustion diagnostics,” Applied Physics B: Lasers and Optics, Vol. 103, No. 1, pp. 229-236, 2011. https://doi.org/10.1007/s00340-010-4338-6
  6. Lee, S.H., Do, H. and Yoh, J.J., "Simultaneous optical ignition and spectroscopy of a two-phase spray flame," Combustion and Flame, Vol. 144, pp. 334-345, 2016.
  7. Miziolek, A.W., Palleschi, V. and Schechter I., Laser-induced breakdown spectroscopy, Cambridge University Press, New York, N.Y., U.S.A., 2006.