CUI Jin-hui,LI Rui-jun,ZENG Qiang,LI Da-wei.Mathematical Model of Core Engine Startup Process based on Identification Method[J].航空发动机,2021,47(5):6-11 |
Mathematical Model of Core Engine Startup Process based on Identification Method |
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Key Words:core engine mathematical model identification method virtual steady-state startup aeroengine |
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Abstract:In order to improve the calculation accuracy of the mathematical simulation model of the startup process of the aeroengine
core engine,the idea of modeling based on identification method was put forward. With the help of the test data of the core engine,the start?
up mathematical model of the core engine was established by solving the rotor torque balanced equation and gas torque characteristics
equation. In the calculation of gas torque characteristics,the concept of "virtual steady-state" in the process of startup and accelerating was
proposed innovatively. The startup process of a core engine was simulated by identification model,and the calculation results of the identifi?
cation model were checked by test data. The results show that the identification method can be used to establish the startup mathematical
model of the core engine,and the identification model has high calculation accuracy,and the error between the calculation results and the
actual test data is less than 2%. Therefore,the identification model can be used as an auxiliary means for the commissioning of the core en?
gine. With the improvement of the core engine testing database,the identification model will be further developed and its calculation ability
and accuracy will continue to be improved. |
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