西安交通大学能源与动力工程学院,710049,西安
作者简介:范智翔(2002—),男,博士生;
张楚华(通信作者),男,教授,博士生导师。
收稿:2025-04-06,
纸质出版:2026-01-10
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范智翔, 张夏雯, 李震, 等. 跨声速压气机转子通用
FAN Zhixiang, ZHANG Xiawen, LI Zhen, et al. Machine Learning-Assisted Optimization of Generalized
范智翔, 张夏雯, 李震, 等. 跨声速压气机转子通用
FAN Zhixiang, ZHANG Xiawen, LI Zhen, et al. Machine Learning-Assisted Optimization of Generalized
针对雷诺平均纳维-斯托克斯(RANS)方法中现有涡黏湍流模型普遍存在对压气机非设计工况下气动特性及复杂流动计算精度不足的共性问题,通用
k-ω
(GEKO)湍流模型引入了6个自由参数,可根据不同类型流动进行校准,提高了压气机内流计算精度。针对跨声速轴流压气机转子NASA Rotor 67近堵塞、设计点和近失速3个工况进行GEKO湍流模型自由参数的机器学习及多目标优化,并对比分析优化后的GEKO湍流模型、默认的GEKO湍流模型及标准的剪切应力传输(SST)湍流模型的计算精度。结果表明:相较于默认的GEKO湍流模型,优化后的GEKO湍流模型在气动性能曲线、转子出口平面展向参数分布和流场细节方面的计算精度都显著提高;相较于SST湍流模型,优化后的GEKO湍流模型对性能曲线计算更精准,特别对失速裕度的计算精度提高了5.4%,对激波位置和强度的计算精度更高。GEKO湍流模型对于提高跨声速轴流压气机转子的数值模拟精度效果显著,可为发展高精度的RANS湍流模型提供参考。
To address the common issue of insufficient computational accuracy in aerodynamic characteristics and complex flows under off-design conditions of compressors using existing eddy-viscosity turbulence models in Reynolds-averaged Navier-Stokes (RANS)methods,the generalized
k-ω
(GEKO)turbulence model introduces six free parameters that can be calibrated for different types of flows,improves the computational accuracy of internal flows in compressors.This study focuses on machine learning and multi-objective optimization of the free parameters of the GEKO turbulence model for a transonic axial compressor rotor (NASA Rotor 67)under three operating conditions:near-choke,design point,and near-stall.The computational accuracy of the optimized GEKO turbulence model is compared with that of the default GEKO turbulence model and the standard shear stress transport (SST)turbulence model.The results show that compared to the default GEKO turbulence model,the optimized GEKO turbulence model significantly improves computational accuracy in terms of aerodynamic performance curves,spanwise parameter distributions at the rotor outlet plane,and flow field details.Compared to the SST turbulence model,the optimiz
ed GEKO turbulence model provides more accurate performance curve calculations,with a 5.4% improvement in stall margin calculation accuracy.Additionally,the optimized GEKO turbulence model achieves higher accuracy in calculating shock wave locations and intensities. The GEKO turbulence model demonstrates significant effectiveness in enhancing the numerical simulation accuracy of transonic axial compressor rotors,providing a reference for the development of high-precision RANS turbulence models.
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