Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Effects of Aspect Ratio of a Fuel Injection Nozzle into a Supersonic Air Stream on Combustion Characteristics

초음속 공기유동으로의 연료 분사노즐 종횡비 변화에 대한 연소특성 연구

  • 김경무 (국방과학연구소 추진기관부) ;
  • 백승욱 (한국과학기술원 기계공학과(항공우주)) ;
  • 김윤곤 (국방과학연구소 추진기관부)
  • Published : 2004.03.01
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Abstract

This paper is to investigate the combustion characteristics with a three dimensional chemical reacting flow on the aspect ratio of an exit configuration of the slit type nozzle for the fuel injection and to device the methods of combustion／mixing enhancement. The results show that both inside inflow and slit side vertices should be considered from a viewpoint of the mixing. The combustion efficiency becomes the smallest at aspect ratio, where the aspect ratio is less and more than unity, respectively. The total pressure loss becomes the largest at aspect ratio of unity due to the high penetration. All results imply that a streamwise very long slit is desirable with respect to the combustion and the pressure loss.

본 논문에서는 슬릿형 분사노즐의 출구 종횡비에 따라 3차원 화학반응 유동장을 수치적 계산을 통하여 그 특성을 조사하고 연소／혼합 촉진 방법을 고찰하였다. 내부유입유동과 슬릿측면 와동들 둘 다 혼합관점에서 고려되어야 한다는 것을 보여 주었다. 연소효율은 종횡비1.0을 기준으로 작은 경우가 낮고 압력손실 역시 종횡비가 작은 경우가 적다. 모든 결과들은 유동방향으로 긴 슬릿이 연소와 압력손실에 대해 바람직함을 나타내고 있다.

Keywords

References

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