The Study Of Energy Efficiency Of Adaptive Power And Thermal Management System

Due to the challenges of long-distance flight,high mobility and high stealth towards aircrafts in the future,traditional airborne electromechanical systems are increasingly unable to meet the new aircraft's requirements because of its large number of parts,repeated components and single function.The integrated energy management system is the development direction of airborne electromechanical systems.Recently as the new energy management system,the adaptive power and thermal management system(APTMS)is valued by researchers in the aviation field.Aiming at this system,this paper sets the coupled model of this system and aeroengine,based on the design of this system,using numerical simulation,studys the influences of aeroengine performance and system energy efficiency with the change of system parameters and working conditions.The main research results are as following:In the aspect of aeroengine performance,air extraction will lead to the decrease of compressor stability margin when the aeroengine' rotor speed is lower than the critical speed and the increase of compressor stability margin when the aeroengine' rotor speed is higher than it.And the critical speed will increase as the flight altitude increases.Shaft power extraction will lead to the decrease of compressor stability margin,and the decrease degree get larger as the aeroengine' shaft speed decrease.Air extraction and shaft power extraction will both lead to the increase of fuel consumption,and the increase degree get larger as the aeroengine' shaft speed decrease.In the aspect of system energy efficiency,the decrease of fan duct air extraction and flight mach number,the increase of flight altitude and system cooling requirement will lead to the decrease of fuel consumption.The increase of APTMS's rotor speed will lead to the fuel consumption increasing first and then decreasing.And there is an optimal ratio of air extraction and shaft power extraction and an optimal combustor exit temperature that make the fuel consumption at the smallest value.The more heat the fuel sink takes away,the smaller the fuel consumption is,the more heat the fan duct air takes away,the higher the fuel consumption is,and the ram air's influence is between the two of them.The research results provide useful technical support for the engineering design of adaptive power and thermal management system.