Simulation Modeling of an Enhanced Low-Emission Swirl-Cascade Burner

Qubbaj, Ala

University of Texas at Austin

关键词: Natural Gas;    Diffusion;    Burners;    Flames;    Radial Velocity;   

DOI  :  10.2172/838121
RP-ID  :  NONE
RP-ID  :  FG26-02NT41682
RP-ID  :  838121

美国|英语

来源: UNT Digital Library

【 摘 要 】

Based on the physical and computational models outlined in the previous technical progress reports, Natural gas jet diffusion flames in baseline, cascade, swirl, and swirlcascade burners were numerically modeled. The thermal, composition, and flow (velocity) fields were simulated. The temperature, CO{sub 2} and O{sub 2} concentrations, as well as the axial and radial velocity profiles were computed and analyzed. The numerical results showed that swirl and cascade burners have a more efficient fuel/air mixing, a shorter flame, and a lower NOx emission levels, compared to the baseline case. The results also revealed that the optimal configurations of the cascaded and swirling flames have not produced an improved performance when combined together in a ''swirl-cascade burner''.