Abstract
The dynamic characteristic of transient secondary air system has the significance to ensure the airworthiness safety. This paper provides the component method to solve the secondary air system through the analysis between the component method and network method. And we carries out calculations for both steady and transient state problems by using the component method and network method toward series and parallel networks. The results agree well. Then,we couple the secondary air system with the main-flow components by component method to simulate the whole basin of aircraft engine. Finally, we analyze the change of performance and safety among the performance model, the whole engine model and the whole engine model which consider the cavity effect. Through the analysis of the results, we can predict that the whole engine model will provide help for the dynamic analysis of the secondary air system when the method develops maturely.
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