Research On Numerical Simulation Of The Influence Of Slotted Dual-stage Swirler On The Combustion Performance

With the development of aviation gas turbine technology, higher requirements for the combustion performance of the combustor are put forward. And the flame tube head of the combustor is the main area for combustion occurs, the structure of the flame tube head(including cyclone) determines the performance of the combustor, therefore, research and design of the head structure of the combustion chamber is very important.The main work of this paper is to do the numerical study of the combustion performance of model combustor with a dual-stage swirler. First, according to the swirler design criteria, the dual-stage swirler with different vane setting angles has been devised. Also, in accordance with the idea of slotted bluff body and on the basis of the dual-stage swirler, a slotted dual-stage swirler has been designed. Secondly, the combustion performance of the dual-stage swirler combustor with different vane setting angles has been investigated by numerical simulation method. According to the simulation results, the influence of the each swirler's vane setting angles on the performance of the combustion chamber has been compared and analyzed. After comparison and analysis, the better combination regimen for the dual-stage swirler's each vane setting angle has been elected. Finally, the combustion performance of model combustor with slotted dual-stage cyclone and the general dual-stage swirler has been comparative studied.The results show that: the swirler's vane setting angle is an important parameter that affects the performance of the swirler chamber; and it has different effects on the size and shape of the flame tube recirculation zone. Compared with the first-stage swirler's vane setting angle, the effect which the second-stage swirler's vane setting angles on the performance of the combustion chamber is more obvious. In order to achieve optimal performance of the combustion chamber, the selection of each swirler's vane setting angle must be reasonable. In addition, compared to the general dual-stage swirler combustor, the slotted dual-stage swirler combustor has a greater advantage in fuel atomization, flame stability, combustion efficiency and so on.