Numerical Simulation And Control Of Low Pollution Combustor

In this paper a kind of dual-stage swirler model was builded based on single-stage and combustion performance of swirler was investigated by numerical simulation. Under the same inlet condition,the impact of the second stage installation angle range from 40°to 60°on internal flow field of combustion chamber by numerical analysis. Effects of different fuel-air ratio and different inlet temperature on temperature distribution inside the chamber,radial profiles of the outlet gas temperature and the emissions of NO studied. The calculation results showed that the second stage installation angle had little effect on internal flow field of combustor and the recirculation zone was created at 20mm to 40mm distance from the nozzle,the export average temperature linearly increased with inlet temperature and fuel-air ratio,the export NO concentration growed thicker as fuel-air ratio grow larger and the influence become more clear with the addition of inlet temperature.Using cubic interpolation,the database of average outlet temperature to inlet fuel-air ratio builded based on numerical simulation result. In LabVIEW,the average outlet temperature as a control signal,PID algorithm as adjustment model and the data source was created by querying database. The controlling outlet temperature was simulated by the way of querying database Using PID algorithm. the result show that was useful to experimental study.