한국연소학회:학술대회논문집
- 한국연소학회 2004년도 제28회 KOSCO SYMPOSIUM 논문집
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- Pages.235-241
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- 2004
삼단중유연소 버너에서 다단비가 연소현상에 미치는 영향에 대한 수치 연구
Numerical study on the effects of air staging on combustion in the three air stage heavy oil fired combustion system
초록
Computations were performed to investigate the effects of air staging on combustion in three stage heavy-oil fired combustion burner. The burner was designed for 3 MW. Different amounts of air are introduced into each 3 three stages by means of each dampers. The goal of the study is to understand combustion phenomena according to each air stage mass ratios through CFD. Air flow rates at three inlets are adjusted by dampers inside a burner. Here, injection conditions of liquid fuel are kept constant throughout all simulations. This assumption is made in order to limit the complexity of oil combustion though it may cause some disagreement. In case of cold flows, only longitudinal velocities arc considered, On the other hand, flow, temperature and NOx generations are taken into account for reactive flows. Simple parametric study was conducted by setting 1'st air stage mass ratio as a parameter. And an optimal operation condition was found. The computational study is based on k-e model, P-1 radiation model(WSGGM) and PDF, and is implemented on a commercial code, FLUENT.