Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effects of Fuel Composition and Pressure on Autoignition Delay of Biomass Syngas

혼합비율 및 압력 변화가 바이오매스 합성가스의 점화지연 시간에 미치는 영향

  • Shim, Tae Young (School of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Kang, Ki Joong (School of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Lu, Xingcai (School of Mechanical and Power Engineering, Institute of Internal Combustion Engine, Shanghai Jiao Tong Univ.) ;
  • Choi, Gyung Min (School of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Kim, Duck Jool (School of Mechanical Engineering, Pusan Nat'l Univ.)
  • Received : 2015.07.27
  • Accepted : 2015.09.29
  • Published : 2015.12.01
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Abstract

The autoignition characteristics of biosyngas were investigated both numerically and experimentally. The effects of the temperature, gas composition, and pressure on the autoignition characteristics were evaluated. A shock tube was employed to measure the ignition delay times of the biosyngas. The numerical study on the ignition delay time was performed using the CHEMKIN-PRO software to validate the experimental results and predict the chemical species in the combustion process. The results revealed that the ignition delay time increased with an increase in the hydrogen fraction in the mixture. Under most temperature conditions, the ignition delay time decreased with a pressure increase. However, the ignition delay time increased with an increase in pressure under relatively low temperature conditions.

본 연구에서는 바이오매스 합성가스를 모사하여 합성가스의 주요성분에 따른 자착화 특성을 실험 및 수치적으로 고찰하였으며, 온도, 혼합물의 조성, 압력의 변화가 자착화 특성에 미치는 영향을 분석하였다. 충격파관(Shock Tube)을 이용하여 모사 합성가스의 점화지연 시간을 측정하였고, 수치해석은 실험결과 검증과 연소과정 중 중간화학종 분석을 위해 상용프로그램인 CHEMKIN-PRO를 사용하였다. 모든 온도 조건에서 혼합물 내의 수소의 몰 비율이 증가함에 따라 점화지연 시간이 감소하는 현상을 확인할 수 있었다. 1150K 이상의 온도 조건에서 압력이 증가함에 따라 점화지연 시간이 감소하는 현상을 확인 할 수 있었다. 하지만 1150K 이하의 온도 조건에서는 압력이 증가함에 따라 점화지연 시간이 증가하는 현상을 확인할 수 있었다.

Keywords

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