Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Combustion Characteristics of Methane-Air Mixture in a Constant Volume Combustion Chamber(2) : Inhomogeneous Charge

정적연소기에서의 메탄-공기 혼합기의 연소특성(2) : 비균질급기

  • 최승환 (부산대학교 기계공학과) ;
  • 전충환 (부산대학교 기계공학부, 기계기술연구소) ;
  • 장영준 (부산대학교 기계공학부, 기계기술연구소)
  • Published : 2003.07.01
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Abstract

A cylindrical constant volume combustion chamber was used to investigate the flow characteristics at spark plug and the combustion characteristics of inhomogeneous charge methane-air mixture under several parameters. The flow characteristics such as mean velocity and turbulence intensity was analyzed by hot wire anemometer. Combustion pressure development measured by piezoelectric pressure transducer was used to investigate the effect of initial charge pressure, excess air ratio and ignition times on combustion pressure and combustion duration. Mean velocity and turbulence intensity had the maximum value at 200 or 300ms and then decreased to beneath 0.05m/s gradually at 3 seconds. Second mixture is accompanied by an increase in the combustion rate, and that the higher the mass which is added in the second stage injection, the faster the burn rate.

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