Research On The Performance And Characteristic Of Turbine Inter-vane Burner In High Bypass Ratio Turbofan Engine

To improve the performance of gas turbine engine, many new technical ways of changing thethermodynamic cycle of engine has been mentioned. The technique of combustion inside the turbinehas been paid more and more attention. In order to research the performance and characteristic ofTurbine Inter-Vane Burner(TIB) in high bypass ratio turbofan engine, according to performancecalculation and numerical simulation, this thesis study the influence of combustion inside the turbineon the performance of high bypass ratio turbofan engine and the influence of structure of combustionring on the performance of Turbine Inter-Vane Burner.First of all, this thesis study the engine performance calculation. By adding each thermodynamicmodel of combustion inside turbine to the mathematical model of traditional engine, calculated andcompared the difference between four kinds of engines with combustion inside turbine and traditionalengine in different parameters. The results show: Inter-Turbine Burner(ITB) and TIB have differentfeatures. Both of them can significantly improve the performance of traditional separate-flow turbofanengine, and the effect of High-pressure Turbine Inter-Vane Burner (HTIB) is particularly prominent.Secondly, this thesis investigate the Turbine Inter-Vane Burner by numerical simulation.According to changing the length-width ratio of combustion ring of Turbine Inter-Vane,6models withdifferent length width ratio were designed. The realizable k-ε turbulent model, PDF combustionmodel, and DPM model of FLUENT were used to simulate two phase combustion flows in the TIB in5different loading conditions. The results show: the degree of mixing of the high temperature gas andthe main flow affect the temperature field, thereby changing the combustion completeness and thedistribution of outlet temperature. Choosing the length-width ratio of combustion ring reasonably canimprove the combustion efficiency, total pressure loss and the distribution of temperature of TIB. Theresult of numerical simulation can provide the reference for designing TIB.Finally, three-dimensional full-scale main combustion and HTIB were designed to investigatethe influence on flow, combustion and some parameters like combustion efficiency between these twostructure. The results show: after main combustor, HTIB can form combustion and control the localhigh temperature inside combustion ring.