Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Optical Diagnostic Study for Flame Characteristic Analysis in Aluminum Dust Clouds

알루미늄 군입자 화염특성 분석을 위한 광학기법 연구

  • Lee, Sanghyup (School of Mechanical Engineering, Yonsei University) ;
  • Ko, Taeho (School of Mechanical Engineering, Yonsei University) ;
  • Lim, Jihwan (School of Mechanical Engineering, Yonsei University) ;
  • Lee, Dohyung (Advanced Propulsion Technology Center, Agency for Defense Development) ;
  • Yoon, Woongsup (School of Mechanical Engineering, Yonsei University)
  • Received : 2013.06.14
  • Accepted : 2013.09.18
  • Published : 2013.10.01
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Abstract

In this study, In order to develop the measurement method of high energy density metal aluminum dust cloud combustion, flame temperature and emission spectrum was measured using spectrometer. Because of the ultra high ${\mu}m$-sized aluminum flame temperature more than 2400 K, it was measured by non-contact optical technique which is the modified two wavelength pyrometry with 520, 640 nm and spectrum comparison method. These methods were applied to experiment after accurate verification. As a result, we could identify that flame temperature is more than 2400 K in bottom of combustor in both methods. And on the emission spectrum analysis, we could measure AlO radical which is occurred dominantly in aluminum combustion.

본 연구에서는 고에너지 금속 알루미늄 군입자 연소 화염 분석을 위한 측정기법 개발 연구로서 스펙트로메터를 사용하여 화염 온도와 자발광 스펙트럼을 측정하였다. 마이크로 크기의 알루미늄 군입자 연소 반응시 발생하는 화염온도는 약 2400 K 이상의 초고온이므로 비접촉식 광학 계측 방법을 사용하였으며, 측정을 위해 개발된 기법은 520 nm, 640 nm를 사용하는 이색법을 응용한 방법과 광대역 파장 비교법으로서 각각의 방법은 정밀하게 검증 후 실험에 적용되었다. 연소실 하단에서 화염온도 측정결과 두 방법 모두 2400 K 이상의 화염온도를 확인할 수 있었으며 자발광 측정 결과 알루미늄 연소 반응시 가장 지배적으로 발생하는 화학종인 AlO를 확인할 수 있었다.

Keywords

References

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