Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Numerical Study of Turbulent Flow and Combustion in a Micro Combustor with a Baffle Plate

배플이 부착된 마이크로 연소기의 난류유동 및 연소에 대한 수치해석 연구

  • Kim, Won Hyun (School of Mechanical Engineering, Kyungpook National University) ;
  • Park, Tae Seon (School of Mechanical Engineering, Kyungpook National University)
  • Received : 2013.06.02
  • Accepted : 2013.10.20
  • Published : 2013.12.01
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Abstract

Turbulent flow and combustion characteristics in a micro can combustor with a baffle plate are investigated by a Reynolds Stress Model. In order to examine the geometric effects on the turbulent combusting flow, several baffle configurations are selected. The interrelation between the flow structure and the thermal field are investigated by examing the variation of recirculation region, flame length and heat loss. For the flow mixing, the decreasing air hole is more efficient than the decrease of the fuel hole. As the fuel or air hole diameter decreases, combustion efficiency is enhanced and flame length is decreased. Additionally, as the diameter of air hole decreases, the heat loss and combustion temperature are increased, while they are reduced with decreasing the diameter of fuel hole.

배플이 있는 마이크로 연소기의 난류유동 및 연소특성이 레이놀즈 응력 모형에 의하여 조사되었다. 형상변화에 따른 난류 연소유동 대한 영향을 살펴보기 위하여, 여러 개의 배플형상이 선택되었다. 유동구조와 온도장의 상관관계가 재순환 영역, 화염크기, 열손실 변화에 의해 조사되었다. 유동혼합은 연료 유입구의 직경을 감소시키는 것보다 공기유입구의 직경을 감소시키는 것이 더 효율적이었다. 연료 또는 공기유입구의 직경이 감소함에 따라 연소효율은 증가하였고, 화염길이는 감소하였다. 또한, 공기유입구의 직경이 감소함에 따라 연소온도와 열손실이 증가하고, 반면에 연료유입구의 직경이 감소함에 따라 연소온도와 열손실은 감소되었다.

Keywords

References

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