Small scale mixing enhancement of fuel/air using multi-source vortex technology

With the multi-source vortex (MSV) structure fixed on the exit plane of axial swirler, the flow field of combustor was simulated and the effect of MSV on the mixing enhancement of fuel/air was studied. The total temperature of the air inlet was 294.28 K and the fuel was ethane (C₂H₆). The results indicate that, a small scale streamwise vortex is produced downstream each tab, helping enhance the local mixing of fuel and air. The mixing non-uniformity is 13.0% for combustor without MSV, while it declines to smaller than 7.4% with MSV. The mixing non-uniformity decreases when the total blockage of tabs increases, indicating a mixing enhancement of fuel/air.