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Time-Average Character of Gas-Liquid Two Phase Swirl Combustion
Author(s): 
Pages: 335-337
Year: Issue:  2
Journal: Journal of Engineering Thermophysics

Keyword:  spray combustionDNSswirl combustiontime-average;
Abstract: In order to provide a reference of the actual spray evaporation and combustion,Threedimensional swirling spray combustion under different condition were studied by Direct Numerical Simulation(DNS).The gas combustion was modeled by an adaptive one-step reaction mechanism,the droplets were tracked in Lagrangian framework and the evaporation was described by infinite heat conduction model.We have learned the time-average character for both gas phase and liquid phase.It was found that there is mutually reinforcing effect between the combustion and the central recirculation zone(CRZ).Co-swirling leads to a stronger central recirculation zone(CRZ),but there will be a smaller outer recirculation zone(ORZ).The reaction rate is much higher and evaporative cooling effect is more obvious in rich combustion.Turbulence inflow will make contribution to higher dispersed droplets and smaller droplets.
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