Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Ignition Transition by Ignition Position and Time of Gaseous Oxygen/Kerosene Combustor

기체산소/케로신 연소기에서 점화 위치 및 시간에 따른 점화 과정 연구

  • Song, Wooseok (Department of Aerospace and Mechanical Engineering, Graduate School of Korea Aerospace University) ;
  • Shin, Dongsoo (Department of Aerospace and Mechanical Engineering, Graduate School of Korea Aerospace University) ;
  • Son, Min (Department of Aerospace and Mechanical Engineering, Graduate School of Korea Aerospace University) ;
  • Koo, Jaye (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • Received : 2017.06.07
  • Accepted : 2017.12.26
  • Published : 2018.08.01
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Abstract

The objective of this paper is to observe effects of ignition position and time on ignition transition. A gaseous oxygen and liquid kerosene mixture is used as propellant with a shear-coaxial injector. In order to study the ignition delay time and combustion instability intensity, the pressure transducer was used. Sequences, excepting igniter operation time, were fixed to compare the ignition time only. Initial pressure peak and ignition delay time increased as the ignition time was delayed. Additionally, an unstable flame development zone was detected when the igniter was away from the injector.

본 논문에서는 점화 위치 및 시간에 따른 점화 지연 및 연소 불안정에 미치는 영향을 관찰하는 것이 목표이다. 산화제는 기체 산소를 사용하였고 연료는 액체 케로신을 사용하였다. 점화 지연 및 연소 불안정 정도를 관찰하기 위해 압력 트랜스듀서를 이용하여 정압을 측정하였다. 모든 경우의 점화기 작동시기를 제외한 점화 시퀀스는 동일하게 설정하였고 점화 시간은 25 ms 간격으로 설정하였다. 점화 시간이 늦어질수록 초기 압력 피크값과 점화 지연 시간이 증가하는 경향을 보였다. 점화 위치가 분사기로부터 멀어질수록 초기 압력 피크 이후 불안정한 화염 발달 구간이 존재하였다.

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References

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