Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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OH-and CH-Radical Chemiluminescence Characteristics in the Spray Combustion of Ultransonically Atomized Kerosene

초음파에 의해 무화된 케로신 분무연소에서의 OH 라디칼 및 CH 라디칼 자발광 특성

  • Kim, Min Cheol (Department of Material Engineering, Pukyong National University) ;
  • Kim, Jeong Soo (Department of Mechanical Engineering, Pukyong National University)
  • Received : 2017.10.19
  • Accepted : 2017.12.30
  • Published : 2018.02.01
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Abstract

An experimental study was performed to investigate the chemiluminescence characteristics in the spray combustion of ultransonically atomized kerosene. The radical intensity of the spray flame was measured using an ICCD camera and the amount of fuel consumed was obtained by a precise flow-rate measurement technique during combustion. Fuel consumption increased linearly with the increase in carrier-gas flow rate, and typical group combustion, which is a characteristic of spray combustion, was observed. It was found from the analysis of chemiluminescence that the maximum emission intensities of OH and CH radicals decrease, and they move downstream resulting in the increase in a vivid reaction zone as the spray flow rate increases.

초음파 진동자에 의해 미립화된 케로신 분무연소의 OH 라디칼과 CH 라디칼의 자발광 특성을 고찰하기 위한 실험이 수행되었다. ICCD 카메라를 이용하여 분무화염의 자발광 강도를 측정하였으며, 연소 시 소모된 연료량은 정밀유량측정법으로 계측하였다. 그 결과, 연료소모율은 수송기체인 공기 공급유량에 선형적으로 증가하였으며, 분무연소의 특징인 전형적인 그룹 연소가 관찰되었다. OH 라디칼과 CH 라디칼을 분석한 결과, 분사방향으로의 유량 증가에 따라 라디칼 방사강도의 최댓값은 감소하고 그 위치는 후류로 이동하여 반응대의 폭은 증가하였다.

Keywords

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