| With the enhanced awareness of environmental protection, increasingly stringent environmental regulations were developed at home and abroad. In aviation, the International Civil Aviation Organization (ICAO) has developed Committee on Aviation Environmental Protection (CAEP) 1-CAEP8 and other regulations which were used to regulate aircraft engine emission. In this context, a large number of studies of high-performance low-emission combustor had been carried out at domestic and international, and many results obtained. RQL, LPP, LDI and other low-emission combustion technology researches were established.This paper summarizes achievement of the high-performance low-emission combustor at domestic and international, based on the theory of flame stability in vortex, and then achieved Rich-burn Quick-quench Lean-burn (RQL) staged combustion processes in trapped-vortex combustor. The RQL trapped-vortex combustor (RQL-TVC) model and mixing devices were mainly designed, and a set of experimental research system was established in this investigation, and then an experimental study of Combustion Characteristic focused on RQL-TVC was carried out. Under the influence of different inlet air temperature, different inlet air flow mach number and different residual air coefficient parameters (air ratio), overall combustion performance and emission performance of RQL-TVC were verified. The following conclusions were obtained by analyzing the experimental data:NOx emission decreases while CO, UHC emissions increase as the inlet air temperature increases (298K~473K); with air ratio increases (total air ratio in the range of 1.5~5, trapped-vortex air ratio in the range of 0.5~1.7), CO, UHC emissions decrease and NOx emission first increases and then decreases; NOx, CO, UHC emissions all increase as the inlet airflow mach number increases (0.2~0.28).The research results show the emission performance of RQL-TVC, and will help RQL-TVC used in engineering applications. While the research results not only have important guidance significance for the optimized design of the next generation RQL-TVC, but also have some reference value for the research field of the high-efficiency and low-emission low-pollution combustor. |
