한국연소학회지 (Journal of the Korean Society of Combustion)
- 제3권1호
- /
- Pages.71-78
- /
- 1998
- /
- 1226-0959(pISSN)
- /
- 2466-2089(eISSN)
보염기에 의해 안정되는 난류확산화염의 연소특성에 관한 연구
A Study on the Combustion Characteristics of Turbulent Diffusion Flame Stabilized by Bluff Body
초록
The flame stabilization and the combustion characteristics of diffusion flame formed in the wake of a cylindrical bluff body with fuel injection are studied. With the turbulence generator, the flame stability limits and ion currents were measured and analyzed. The results from this experimental study are summarized as follows. The region with highest average value of ion currents in the middle of flame is moved to the upstream side by the turbulent components of main stream. The flame mass with partially active reaction is moved fast for uniform flow and turbulence generator G3, but the flame mass with relatively slow reaction is moved slowly for turbulence generator G1. If the turbulence generator with strong turbulent component is installed, the turbulent time scale is increased with movement from main stream side to recirculation zone as well as the flame stability limits is deteriorated. Though the special dominant frequency is not appeared in the eddy which exists in flame, high frequency characteristics are appeared in uniform flow and turbulence generator G3, and low frequency characteristics are appeared in uniform flow, turbulence generator G3 and G1.
키워드