Simulation of the effect of interstage turbine burner pressure recovery factor on turbofan engine performance
In order to analyze the influence of interstage turbine burner pressure recovery factor on the net thrust and specific fuel consumption of mixed exhaust turbofan engine with medium bypass ratio under different flight conditions,the interstage burning was added,and the steady-state performance calculation model of component level was established based on the original engine without interstage turbine burner cycle parameters.The simulation results showed that:when the turbofan aeroengine flight height was 5 km and flight Mach number was 0.8,and the interstage turbine burner pressure recovery factor changed from 0.92 to 0.8,resulting in the increase of specific fuel consumption by 12.2％.When the flight height was 5 km,and flight Mach number was 1.8,the interstage turbine burner pressure recovery factor changed from 0.92 to 0.8,which increased the specific fuel consumption of the engine by 20.3％.When the calculation program was used in model simulation,the pressure recovery factor of interstage turbine burner was basically unchanged.However,existing studies on interstage turbine burner showed that:the interstage turbine burner pressure recovery factor could aggrandize with the increase of flight Mach number.When the flight Mach number changed from 0.8 to 1.8,the interstage turbine burner pressure recovery factor increased by more than 2％.Therefore,the calculation results were adopted from the perspective of variable interstage turbine burner pressure recovery factor to study its influence on engine performance.
mixed exhaust turbofan engine with medium bypass ratiointerstage turbine burner pressure recovery factorflight Mach numbernet thrustspecific fuel consumption
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