Effects of different influencing factors under mass injection and pre-compressor cooling on turbofan engine performance
In order to study the performance and stability of turbofan engine under mass injection and pre-compressor cooling(MIPCC),the steady-state performance of turbofan engine was numerically simulated by considering three factors:inlet mixing heat exchange,modification of thermophysical properties of working fluid and modification of component characteristics.The calculation results showed that the thrust of engine under MIPCC greatly increased due to the increase of intake flow,in which the inlet mixing heat exchange is the direct factor contributing to the increase of intake flow,while the changes of thermophysical properties of working fluid and component characteristics lead to the decrease of the thrust of engine.Even if with high water-air ratio,the thrust level can still be greatly enhanced by intake flow.Inlet mixing heat exchange can make fan work closer to the surge point,however,with the increase of water-air ratio,the stability of fan and high-pressure compressor both rose.
mass injection and pre-compressor cooling(MIPCC)mixing heat exchangethermophysicalpropertiescomponentcharacteristicsthrustsurgemargin
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