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

The Korean Society of Mechanical Engineers (대한기계학회)
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Short Reaction Mechanism for Premixed CH4-Air Flames at High Pressure

고압에서 예혼합 CH4-Air 화염의 축소 반응 메카니즘

  • Lee, Su-Gak (Dept. of Mechanical Engineering, Andong Nat'l Univ.) ;
  • Lee, Ki-Yong (Dept. of Mechanical Engineering, Andong Nat'l Univ.)
  • 이수각 (안동대학교 기계공학과) ;
  • 이기용 (안동대학교 기계공학과)
  • Received : 2012.01.09
  • Accepted : 2012.03.30
  • Published : 2012.06.01
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Abstract

A short reaction mechanism for premixed $CH_4$-air flames at high pressure was developed using a reduction method based on the combined application of the simulation error minimization connectivity method and the iterative species-removal sensitivity method. It consisted of 43 species and 554 elementary reactions under the condition that it produces less than 5% of the maximum error. The flame structures obtained using a detailed reaction mechanism and the short reaction mechanism were compared for $CH_4$-air flames with various initial temperatures and equivalence ratios at high pressure, and the results were in good agreement. Therefore, the short reaction mechanism developed could reproduce the flame speeds, temperatures, and concentrations of major and minor species at high pressure.

에러 최소 연결 방법(SEM-CM) 및 반복적 화학종 제거 민감도를 적용한 반응 메카니즘 감소 방법을 갖고, 고압에서 메탄-공기 예혼합 화염에 대한 축소 반응 메카니즘을 개발하였다. 최대 5% 이내의 에러 조건에서 얻어진 축소 반응 매카니즘은 43개 화학종과 554개 기초반응식으로 구성되어 있다. 고압조건에서 다양한 초기온도, 당량비를 갖는 메탄-공기 화염에 대하여 상세 화학반응 메카니즘과 축소 반응 메카니즘으로부터 얻어진 화염구조는 비교되었고, 결과는 잘 일치하였다. 따라서 개발된 축소 반응 메카니즘은 고압에서 화염속도, 화염온도, 주 화학종 및 부 화학종의 농도 등을 재생할 수 있다.

Keywords

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