Modeling system and modeling method for aero-engine nonlinear model containing CDFS structure

Abstract

The invention belongs to the field of aero-engine modeling, and discloses a modeling system and modeling method for an aero-engine nonlinear model containing a CDFS structure. The aero-engine nonlinear model modeling system with the CDFS structure comprises a CDFS information acquisition module, an outer culvert information acquisition module, a central control module, an inner culvert information acquisition module, a data analysis module, a CDFS numerical model construction module, an outer culvert outlet flow calculation module, an outer culvert outlet static pressure calculation module, an outer culvert inlet control module and a display module. The modeling method for the aero-engine nonlinear model containing the CDFS structure is a modeling method of an aero-engine with the CDFS structure, and in the modeling process, a numerical model of the CDFS and a numerical model of a front duct ejector of a rear deflation duct of the CDFS are constructed respectively; and the real-time mixing condition of the multiple air flows of the aero-engine with the CDFS structure is calculated, so that the purpose of real-time numerical simulation is achieved.

Description

Technical field[0001]The present invention belongs to the field of aerospace engine modeling, and more particularly to an air engine nonlinear model modeling system and modeling method containing a CDFS structure.Background technique[0002]At present: The aerospace engine model is an important means and tool used in engine development. The characteristics of the engine can be expressed in mathematical ways, and the engine performance is simulated, effectively reducing engine development costs and test risks, and development of engine There's important meaning. The real-time model is a mathematical model that can reflect the engine operating state in real time. The model requires that the time calculating various engine states in the computer is equivalent to the time of the real engine works in the same state, and each step of the real-time model calculation is also related to the real engine. the same. The real-time model can reflect the engine pneumatic thermodynamic parameters in ...

AI Technical Summary

Problems solved by technology

[0003] For an aero-engine with a CDFS (Core Driven Fan) structure, it can change the thermal cycle by changing the geometric shape, size, position, etc. Advanced but more complex configuration

For aero-engines with a CDFS (Core Driven Fan) structure, there is a bleed duct after the CDFS, but the existing engine real-time model does not have a corresponding component-level model; The flow path of the engine real-time model is different, and the existing engine real-time model cannot perform real-time calculation for multi-stream mixing

[0004] Through the above analysis, the existing problems and defects of the existing technology are: the existing engine real-time model does not have a corresponding component-level model; and the existing engine real-time model cannot perform real-time calculation for multi-stream mixing

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