首页|An axisymmetric characteristic model for enhancing prediction of centrifugal compressor characteristics

An axisymmetric characteristic model for enhancing prediction of centrifugal compressor characteristics

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Rapid and accurate determination of compressor characteristic maps is essential for the ini-tial design of centrifugal compressors in aircraft power systems.The accuracy of existing methodolo-gies,which rely on combinations of loss models,varies significantly depending on the compressor's geometry and operational range.This variance necessitates substantial experimental or Computational Fluid Dynamics(CFD)data for coefficient calibration.To address this challenge,this study presents an axisymmetric characteristic model for compressor performance assessment.This model incorporates the factors of blade angle,meridional passage area,and the radial deflection angle of meridional stream-lines of the compressor.These factors are derived from fundamental aerodynamic equations encom-passing mass,momentum,and energy conservation of the compressor.In contrast to conventional one-dimensional approaches,the proposed method reduces the number of loss coefficients and more effectively accounts for the impact of geometric alterations on centrifugal compressor properties.Fur-thermore,the model reduces dependence on experimental and CFD data.Efficacy of the model is val-idated using experimental data from four distinct types of centrifugal compressors.Correlation analysis reveals that the model's coefficients can be expressed as functions of the ratio of the Reynolds number to the impeller tip speed.This ratio serves as a characteristic parameter for the design and optimization of centrifugal compressors.Consequently,the proposed method offers an efficient and accurate means for the quick computation of centrifugal compressor characteristics.This is of great significance for improving the efficiency of centrifugal compressors and reducing energy consumption.

Centrifugal compressorPositive problemCharacteristic predictionAerodynamic characteristicAxisymmetric model

Peng REN、Xiangjun FANG、Zeyu JIAO、Ying HAN

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School of Energy and Power Engineering,Beihang University,Beijing 100191,China

Guangdong Key Laboratory of Modern Control Technology,Institute of Intelligent Manufacturing,Guangdong Academy of Sciences,Guangzhou 510070,China

Guangdong Basic and Applied Basic Research Foundation广东省自然科学基金GDAS'Project of Science and Technology Development,China

2022A15151100072023A15150128692021GDASYL-20210103090

2024

10.1016/j.cja.2024.01.009

中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
年,卷(期)：2024.37(4)
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