Design And Simulation Of A Trapped Vortex Combustor

Combined with the research experience of trapped vortex combustors (TVC) at home and abroad, a High End Digital Prototyping system is used to pre-process an initial TVC model and the one with a device for flame joint and flow stabilization. In conditions of various inlet Mach numbers, the two models are simulated by means of CFD methods, and cold flow field structure and total pressure loss are analyzed. Then, under the working condition with Mach number0.2, combustion flow fields of the two models are chosen for analysis and comparison. The simulation results show that the NOx-emission level is lower than the one of normal chamber. With addition of the device for flame joint and flow stabilization, the combustor can get better energy transfer in the mainstream area, instead of being cut by the mainstream with excessive speeds. The combustion efficiency and outlet temperature distribution can be improved greatly. Meanwhile, the total pressure loss is also increased, which requires a design refinement subsequently.The results in this thesis could provide references for further research on refining TVC designs, and offer new research ideas for high-performance low-emission aero-engines.