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

The Korean Society of Mechanical Engineers (대한기계학회)
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Effect of Swirling Flow by Normal Injection of Secondary Air on the Gas Residence Time and Mixing Characteristics in a Combustor

연소로 내 2차공기의 주유동 수직방향 선회분사로 인한 선회류가 스월수에 따른 가스 체류시간과 혼합 특성에 미치는 영향

  • 박상욱 (연세대학교 대학원 기계공학부) ;
  • 전병일 (연세대학교 대학원 기계공학부) ;
  • 류태우 (한국생산기술연구원) ;
  • 황정호 (연세대학교 기계공학부)
  • Published : 2006.01.01
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Abstract

We investigated gas residence time and mixing characteristics due to various swirl numbers generated by normal injection of secondary air to a lab-scale cylinderical combustor. The residence time was estimated by measuring the temporal pressure difference which was caused by deposition of test particles on a filter media after the injection by a syringe. The mixing characteristics were evaluated by standard deviation value of test gas concentration at different measuring points. The test gas concentration was detected by a gas analyzer. The swirl number of $20{\sim}30$ for ${\theta}=5^{\circ}$ caused long residence time enough to improve mixing characteristics. Numerical calculations were also carried out to understand physical meanings of the experimental results.

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References

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