Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Combustion Characteristics of Methane-Oxygen Diffusion Flame Formed by Swirl-coaxial Injector

스월 동축형 인젝터에 의해 형성되는 메탄-산소 확산화염의 연소특성

  • Bae, Seong Hun (Department of Mechanical Engineering, Pukyong National University) ;
  • Hong, Joon Yeol (Department of Mechanical Engineering, Pukyong National University) ;
  • Kim, Heuy Dong (Department of Mechanical Engineering, Andong National University) ;
  • Kim, Jeong Soo (Department of Mechanical Engineering, Pukyong National University)
  • Received : 2017.01.27
  • Accepted : 2017.03.15
  • Published : 2017.04.01
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Abstract

In order to analyze combustion characteristics of methane-oxygen diffusion flame in a model combustor, combustion experiments were carried out under various spray conditions of propellant scrutinizing combustion stability limit and flame shapes. As the propellant approached the theoretical equivalence ratio condition, a stable detached flame was observed even under high oxygen Reynolds number. And the length of the visible flame increased and the lift-off distance of the flame exhibited a tendency toward decrease. Due to the swirl effect of the propellant by the swirl-coaxial injector, a wide and short flame was produced. Thus, it may be appropriate to employ the swirl-coaxial injector in thrusters having a limited physical dimension.

본 연구에서는 모델연소실 내부 메탄-산소 확산화염의 연소특성을 분석하기 위해 추진제의 다양한 분사조건에서 연소실험을 수행하여 연소안정한계 측정 및 화염의 형상변이를 관찰하였다. 연구 결과, 추진제가 이론당량비 조건으로 접근할수록 높은 산소 Reynolds 수($Re_o$) 구간에서도 안정적인 부상화염이 관찰되었으며, 가시화염의 길이는 증가하고, 부상높이는 감소하는 경향이 나타났다. 스월 동축형 인젝터에 의한 추진제의 스월효과로 인해 폭이 넓고, 길이가 짧은 화염이 생성되어 연소실 크기가 제한적인 추력기에서의 사용이 적합함을 확인하였다.

Keywords

References

  1. Sutton, G.P. and Biblarz, O., Rocket Propulsion Elements, 8th ed., John Wiley & Sons Inc., New York, N.Y., U.S.A., 2010.
  2. Kim, J.S., Jung, H. and Kim, J.H., "State of the Art in the Development of Methane/Oxygen Liquid-bipropellant Rocket Engine," Journal of the Korean Society of Propulsion Engineers, Vol. 17, No. 6, pp. 120-130, 2013. https://doi.org/10.6108/KSPE.2013.17.6.120
  3. Bae, S.H., Jung, H. and Kim, J.S., "A Preliminary Configuration Design of Methane/Oxygen Bipropellant Small-rocketengine through Theoretical Performance Analysis," Journal of the Korean Society of Propulsion Engineers, Vol. 19, No. 3, pp. 47-53, 2015. https://doi.org/10.6108/KSPE.2015.19.3.047
  4. Moore, J.D. and Kuo, K.K., "Effect of Switching Methane/Oxygen Reactants in a Coaxial Injector on the Stability of Non-Premixed Flames," Combustion Science and Technology, Vol. 180, No. 3, pp. 401-417, 2008. https://doi.org/10.1080/00102200701780887
  5. Fdida, N., Vingert, L., Ordonneau, G., Ristori, A. and Brossard, C., "Characterization of a Double Swirl Injector in a $LOX/LCH_4$ Fueled Combustor on Mascotte Test Bench," ONERA-DLR Aerospace Symposium, Palaiseau, France, May 2013.
  6. Pauly, C., Sender, J. and Oschwald, M., "Ignition of a Gaseous Methane/Oxygen Coaxial Jet," Progress in propulsion Physics, Vol. 1, pp. 155-170, 2009.
  7. Salgues, D., Mouis, A.G., Lee, S.Y., Kalitan, D. and Santoro, R., "Shear and Swirl Coaxial Injector Studies of LOX/GCH4 Rocket Combustion Using Non-Intrusive Laser Diagnostics," 44th AIAA Aerospace Sciences Meeting and Exhibit, Reno, N.V., U.S.A., AIAA 2006-757, Jan. 2006.
  8. Bae, S.H., Hong, J.Y., Bae, D.S. and Kim, J.S., "A Preliminary Experiment for the Investigation of Combustion Characteristics on the Methane-oxygen Diffusion Flame," Proceedings of the 2016 KSPE Fall Conference, Gangwon-do, Korea, pp. 892-895, Dec. 2016.
  9. Bae, S.H., Kwon, O.C. and Kim, J.S., "Spray Characteristics of Swirl-coaxial Injector According to the Recess Length and Injection Pressure Variation," Journal of the Korean Society of Propulsion Engineers, Vol. 20, No. 4, pp. 68-76, 2016. https://doi.org/10.6108/KSPE.2016.20.4.068
  10. Kim, J.H., Jung, H. and Kim, J.S., "Analysis of the Theoretical Performance Characteristics for Methane-fuel Bipropellant Rocket Engine," Journal of the Korean Society of Propulsion Engineers, Vol. 18, No. 3, pp. 1-7, 2014. https://doi.org/10.6108/KSPE.2014.18.3.001
  11. Choi, S., Kim, T.Y., Kim, H.K., Koo, J.Y. and Kwon, O.C., "Effects of Pressure Variation on the Combustion Characteristics of a Gaseous $CH_4/O_2$ Bipropellant in a Model Combustor," Journal of the Korean Society of Propulsion Engineers, Vol. 21, No. 1, pp. 63-71, 2017. https://doi.org/10.6108/KSPE.2017.21.1.063
  12. Kuo, K.K., Principles of Combustion, 2nd ed., John Wiley & Sons Inc., New York, N.Y., U.S.A., 2005.