Correlation between core engine flow and thrust of a high bypass ratio engine
To meet the design requirements of different takeoff thrusts for high bypass ratio engines,a study on the correlation of engine takeoff thrust is conducted using Gasturb software based on core engines with varying intake mass flow rates and compression ratios.Taking the core engine with the highest compression ratio and the largest intake mass flow rate as an example,the method of re-matching the low-pressure components of the core engine is employed to design the engine performance parameters corresponding to different thrust levels.The results indicate that the intake mass flow rate of the core engine significantly affects the engine takeoff thrust,whereas the compression ratio has a smaller impact.The larger the intake mass flow rate of the core engine,the greater the engine thrust.Reducing the number of low-pressure component stages can decrease the engine thrust,but may affect fuel consumption,size,and component design.Enhancing the design level of low-pressure components and increasing the number of low-pressure component stages can increase the designed takeoff thrust of the engine,but the engine temperature margin requirements must be met.
core enginehigh bypass ratio enginecore engine flowthrust
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