An Experimental Study on Turbulent Counter Jet Flame near Stagnation Point

대향 제트 정체점 주변의 난류 화염에 관한 연구

  • 고일민 (LG화학) ;
  • 서정일 (한국과학기술원 기계공학과 대학원) ;
  • 홍정구 (한국과학기술원 기계공학과 대학원) ;
  • 신현동 (한국과학기술원 기계공학과)
  • Published : 2006.04.14

Abstract

A characterization of turbulent reacting flows has proved difficult owing to the complex interaction between turbulence, mixing, and combustion chemistry. There are many types of time scales in turbulent flame which can determine flame structure. This counter jet type premixed burner produces high intensity turbulence. The goal is to gain better insights into the flame structures at high turbulence. 6 propane/air flames gave been studied with high velocity fluctuation in bundle type nozzle and in one hole type nozzle. By measuring velocity fluctuation, turbulent intensity and integral length scale are obtained. And sets of OH LIF images were processed to see flame structure of the mean flame curvatures and flame lengths for comparison with turbulence intensity and turbulent length scales. The results show that the decrease in nozzle size generates smaller flow eddy and mean curvatures of the flame fronts, and a decrease in Damkohler number estimated from flow time scale measurement.

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