Simulation analysis of the influence of acceleration and deceleration control on the performance of a aero-engine

LI Jun; ZHOU Yuzhao; LI Ruijun

doi:10.19471/j.cnki.1673-6397.2025.04.005

Abstract：The mode of the acceleration and deceleration process in the transient state of a certain turbojet aero-engine is analyzed.The transient simulation model is established by using AEAYS-606 software.The acceleration and deceleration fuel control algorithm is realized by adjusting the compressor converted speed.The transient working condition simulation is realized by combining the power extraction method.The influence of different acceleration and deceleration control on the performance of the engine is analyzed.The results show that the design of acceleration and deceleration fuel is aimed at the shortest acceleration and deceleration time,and it is necessary to avoid the acceleration and deceleration process.Each parameter should not exceed or approach the stable boundary of each component for the objective.Comparing different controls,it is found that in order to shorten the acceleration time by 2 s,the maximum vortex temperature needs to be increased by 1.4%,the compressor stability is reduced by 4%,and the engine life and stability are drastically reduced.The appropriate acceleration control law should be selected according to the actual application needs of the engine.Comparing different deceleration controls,it is found that the compressor margin is significantly increased,but when the deceleration time is less than 3 s,the minimum air-fuel ratio the main combustion chamber during deceleration is less than the main combustion chamber extinction air-fuel ratio boundary.There is a risk of misfire in the main combustion chamber.