Overview of Dynamic Characteristics of Typical Power Output Configuration for Aero-derived Gas Turbine
The conversion of aircraft engines to gas turbines refers to the development of gas turbines based on mature aircraft engines through improvement.It is the main means of developing light gas turbines in recent years,which can significantly reduce technical dif-ficulties,shorten development cycles,and effectively reduce research and development costs.According to the different forms of power output from aero-derived gas turbine,they can be divided into three types of configurations:back-end output power configuration gas turbines,front-end output power configuration gas turbines,and front and rear simultaneous output power configuration gas turbines.In order to summarize and master the dynamic design characteristics of gas turbines with different output configurations,research on the structural characteristics,critical speed-operating speed relationship and strain energy distribution of three types of output configura-tions was carried out,a study was conducted on the dynamic characteristics of the above-mentioned configurations of aero-derived gas turbine.The results showed that:both domestic and foreign aviation engines are still pursuing the design of rigid rotors within the work-ing speed range for aero-derived gas turbine rotor systems,which requires strict control of rotor strain energy levels,ensuring and im-proving rotor stiffness is the key to the mechanical design of aero-derived gas turbine.From the perspective of structural differences,the order of dynamic design from easy to difficult is:back-end output power configuration,front-end output power configuration,and front and rear simultaneous output power configuration.Studying and summarizing the dynamic characteristics of aero-derived gas tur-bine with different output power configurations has significant engineering reference significance for the design and development of aero-derived gas turbine.
aero-derived gas turbinepower output configurationdynamics characteristics
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