Axial flow compressor one-dimensional model modeling and correction method

A one-dimensional model of an axial compressor was established by using the mean diameter method and polynomial fitting method. The PSO algorithm was then used to correct the model parameters step by step, which solved the problem of insufficient accuracy of the one-dimensional model of the axial compressor in the existing technology and achieved high-precision simulation of the engine's overall performance.

CN117494566BActive Publication Date: 2026-07-21NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Filing Date
2023-11-09
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing technologies make it difficult to establish high-precision one-dimensional models of axial compressors under operating conditions such as variable guide vanes and variable blade tip clearance. The calculation results of traditional methods are inconsistent with the experimental results, and the three-dimensional simulation calculation is too time-consuming and is not suitable for dynamic real-time calculation of the entire engine.

Method used

A one-dimensional performance model of an axial compressor was established using the median diameter method. The backward angle and loss model at the non-design point were corrected using the polynomial fitting method. The model parameters were then corrected stepwise using the particle swarm optimization (PSO) algorithm to improve the model accuracy.

Benefits of technology

High-precision one-dimensional model calculations were achieved under variable guide vane and variable tip clearance conditions. The simulation results showed good consistency with the experimental results and were suitable for high-precision simulation of the overall engine performance. The calculation error was less than 4%.

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Abstract

The application discloses a kind of axial flow compressor one-dimensional model modeling and correction method.First, the axial flow compressor one-dimensional model is established by gradually cascade through mid-diameter method, then based on design point lag angle and reference loss model, non-design point lag angle and non-design point loss model are established using polynomial fitting method, finally, the established axial flow compressor one-dimensional model is stepwise corrected using PSO algorithm, so that model calculation results are aligned with test data.The above method is used to establish and complete the correction of a certain axial flow compressor one-dimensional model, and the simulation verification and comparison show that the maximum error of compressor characteristic calculation results compared with test results is not more than 6%, and the maximum error is not more than 4% when the compressor model is embedded into the performance model of a certain turbo-shaft engine for simulation verification, which verifies the effectiveness of the method.
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