Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Effects of Ultrasonic Standing Wave on the Ultrasonically-atomized Aerosol Flame Injected through a Slit-jet Nozzle

Slit-jet 노즐을 통과한 초음파 무화 에어로졸 화염에 정상초음파가 미치는 영향

  • Ahn, Hyun Jong (Department of Mechanical Engineering, Pukyong National University) ;
  • Kang, Yun Hyeong (Department of Mechanical Engineering, Pukyong National University) ;
  • Kim, Jeong Soo (Department of Mechanical Engineering, Pukyong National University)
  • Received : 2020.10.09
  • Accepted : 2020.11.30
  • Published : 2020.12.31
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Abstract

In liquid-fuel spray combustion, an experimental study was conducted to observe the effect of ultrasonic excitation on the ultrasonically-atomized liquid fuel flame by controlling pressure field through an ultrasonic standing wave. Flame of the ultrasonically-atomized kerosene aerosol was visualized by using a high speed camera, DSLR, and Schlieren photography. The amount of fuel consumed was obtained by a precise flow-rate measurement technique during combustion, through which the ratio of carrier gas (air) to fuel mass was able to be obtained, too. As a result, it could be found that the combustion reaction-rate of the liquid-fuel aerosol was increased by applying an ultrasonic standing wave to the secondary flame zone of the flame.

액체연료 분무 연소에서 화염 외부에 정상초음파 가진을 통해 압력장을 조절함으로써 초음파 무화액체연료 화염에 미치는 초음파 가진의 영향을 관찰하는 실험을 수행하였다. 초음파에 의해 미립화된 케로신 에어로졸화염은 초고속카메라, DSLR 그리고 슐리렌 촬영기법을 이용하여 가시화하였다. 연소시 소모된 연료량은 정밀유량측정법으로 계측하였고, 이를 통해 수송기체 공연비를 구할 수 있었다. 실험결과, 2차화염영역에 정상초음파를 가함에 따라 액체연료 에어로졸의 연소반응률이 증대되는 것을 관찰할 수 있었다.

Keywords

Acknowledgement

본 논문은 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업(NRF-2016R1D1A3B01012622)의 연구결과임.

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