Journal of the Korean Society of Combustion (한국연소학회지)

The Korean Society of Combustion (한국연소학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Self-excitation in Laminar Lifted Coflow-jet Flames

층류 동축류 제트 부상화염에서의 자기진동에 관한 연구

  • Van, Kyu Ho (Department of Mechanical Engineering, Pukyoung National University) ;
  • Lee, Won June (Department of Mechanical Engineering, Pukyoung National University) ;
  • Park, Jeong (Department of Mechanical Engineering, Pukyoung National University) ;
  • Kim, Tae Hyung (Power Generation Research Laboratory, Korea Electric Power Research Institute) ;
  • Park, Jong Ho (Department of Mechanical Engineering, Chungnam National University)
  • 반규호 (부경대학교 기계공학과) ;
  • 이원준 (부경대학교 기계공학과) ;
  • 박정 (부경대학교 기계공학과) ;
  • 김태형 (한전전력연구원 발전연구소) ;
  • 박종호 (충남대학교 기계공학과)
  • Received : 2015.02.04
  • Accepted : 2015.03.20
  • Published : 2015.03.30
Download PDF
⟨ Previous Next ⟩

Abstract

A study on laminar jet flames in coflow air diluted with helium has been conducted to investigate self-excitations for various propane mole fractions and nozzle exit velocities. The stability map was represented as a function of nozzle exit velocity and fuel mole fraction for propane. The results show that two types of self-excitation were observed : (1) buoyancy-driven self-excitation (hereafter called BDSE) and (2) Lewis-number induced-self-excitation coupled with (1) (hereafter called LCB) near extinction limit for 9.4 mm nozzle diameter. It was shown that with 0.95 mm nozzle diameter, Lewis-number-induced self-excitation (hereafter LISE) and BDSE could be separated. The differences between the two self-excitations were shown and discussed.

Keywords

References

  1. Chung, S. H. and Lee, B. J., On the Characteristics of Laminar Lifted Flames in a Nonpremixed Jet, Combust. flame, 86 (1991) 62-72 https://doi.org/10.1016/0010-2180(91)90056-H
  2. Lee, B. J. and Chung, S. H., Stabilization of Lifted Tribrachial Flames in a Laminar Nonpremixed Jet, Combust. Flame, 109 (1997) 163-182 https://doi.org/10.1016/S0010-2180(96)00145-9
  3. Won, S. H., Chung, S. H., Cha, M. S. and Lee, B. J., Lifted Flame Stabilization in Developing and Developed Regions of Coflow Jets for Highly Diluted Propane, Proc. Combust. Inst., 28 (2000) 2093-2099.
  4. Won, S. H., Kim, J., Shin, M. K., Chung, S. H., Fujita, O., Mori, T., Choi, J. H. and Ito, K., Normal and Microgravity Experiment of Oscillating Lifted Flames on Coflow, Proc. Combust. Inst., 29 (2002), 37-44.
  5. M. Furi, O. Papas, P. A. Monkewitz, Non-premixed jet flame pulsations near extinction, Proc. Combust. Inst. 28 (2000) 831-838
  6. S. H. Yoon, J. K. Han, J. Park, J. H. Yun, S. I. Keel., Self-excitation in laminar lifted flames diluted with nitrogen, Combust. flame, 158 (2011), 1960-1969 https://doi.org/10.1016/j.combustflame.2011.02.020
  7. S. H. Yoon, J. Park, O. B. Kwon, J. H. Yun, S. I. Keel, J. S. Kim, D. S. Bae, Experimental study on self-excitations in nitrogen-diluted laminar lifted butane flames, Fuel, 91 (2012) 51-60 https://doi.org/10.1016/j.fuel.2011.06.033
  8. W. J. Lee, J. Park, O. B. Kwon, J. H. Yun, S. I. Keel. Lewis-number-induced and buoyancy-driven self-excitations in nitrogen-diluted laminar nonpremixed free-jet flames, Fuel, 112 (2013) 366-374. https://doi.org/10.1016/j.fuel.2013.05.030
  9. Kurdyumov, V. and Matalon, M., Stabilization and onset of oscillation of an edge-flame in the nearwake of a fuel injector, Proc. Comb. Inst., 31 (2007) 909-917.
  10. Kurdyumov, V. and Matalon, M., Dynamics of an edge flame in a mixing layer, Comb. Flame, 139 (2004) 329-339. https://doi.org/10.1016/j.combustflame.2004.09.005
  11. Kurdyumov, V. and Matalon, M., Radiation losses as a driving mechanism for flame oscillations, Proc. Comb. Inst., 29 (2002) 45-52.
  12. Kee, R. J., Grcar. J. F., Smooke, M. D., Miller, J. A., A Fortran program for modeling steady laminar one-dimensional premixed flames. Report No. SAND85-8240 (1993) Sandia National Laboratories.
  13. Wang, H., You, X., Joshi, A. V., Davis, S. G., Davis, A., Laskin, F., Egolfopoulos, C. K., Law, High-Temperature Combustion Reaction Model of $H_2$/CO/C1-C4 Compounds (2007) .